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Kia · Known Issues

2022 Kia K5 Problems: 23 Known Issues

2022 model year · 1,192+ owner reports · Updated September 2026

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Issue summary

According to Au7o's analysis of 1,192+ owner reports, the 2022 Kia K5 has 23 documented known issues, with 10 rated critical. The most serious are Battery Drain / No-Start After Sitting (Telematics/Module Sleep Issue) ($180-$1,200 repair), Forward Collision Avoidance Assist (FCA) Phantom Braking Events, SmartStream G2.5 GDI Engine Piston Ring/Oil Consumption Issue, Electronic Parking Brake (EPB) Warning / Auto-Hold Malfunction ($180-$900 repair), Rear Wheel Bearing Premature Failure and Humming Noise ($250-$650 repair), Transmission Control Unit (TCU) Software Fault Causing Harsh Upshifts or Limp Mode (8-Speed AT), Windshield Optical/Rain Sensor Bracket Detachment (ADAS/Auto Wipers Inoperative) ($250-$1,400 repair), Brake Booster / Vacuum Pump Noise and Reduced Brake Assist (1.6T) ($50-$900 repair), Fuel Tank Expansion and Fire Risk and 8-Speed DCT Electric Oil Pump Failure. The most commonly reported issue is Battery Drain / No-Start After Sitting (Telematics/Module Sleep Issue) with 160 owner reports. Across all issues with published estimates, repair costs range from $10 to $2,000. DIY maintenance guides at au7o.io.

In This Article

  • K5 Transmission3
  • K5 Safety/Recalls2
  • K5 Brakes2
  • K5 Electrical4
  • K5 Engine3
  • K5 Suspension3
  • K5 Fuel System1
  • K5 Body/Panels3
  • K5 HVAC1
  • K5 Interior1
  • Recalls8
  • FAQ
Get Started
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In This Article

  • Transmission3
  • Safety/Recalls2
  • Brakes2
  • Electrical4
  • Engine3
  • Suspension3
  • Fuel System1
  • Body/Panels3
  • HVAC1
  • Interior1
  • Recalls8
  • FAQ

All 23 Known Issues

NHTSA Recalls8 recalls

EXTERIOR LIGHTING:LIGHTING CONTROL MODULE:SOFTWARE

Kia America, Inc. (Kia) is recalling certain 2025 K5 vehicles. A software error in the Power-net Domain Controller (PDC) may cause the parking lights to flicker. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) 108, "Lamps, Reflective Devices, and Associated Equipment."

Campaign #25V35100027/05/2025

STRUCTURE:BODY:ROOF AND PILLARS

Kia America, Inc. (Kia) is recalling certain 2023-2025 K5 vehicles. The left and right rear window trim pieces may loosen and detach.

Campaign #25V49300028/07/2025

AIR BAGS:SIDE/WINDOW:CURTAIN

Kia America, Inc. (Kia) is recalling certain 2021-2023 K5 vehicles. The side curtain air bags may have been installed incorrectly, causing them not to deploy properly in the event of a crash.

Campaign #23V14900007/03/2023
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Other Kia Models

Kia Forte31Kia Telluride28Kia Carnival26Kia Sportage25Kia EV621Kia Sorento21

Frequently Asked Questions

What are the most common Kia K5 problems?

According to Au7o's analysis of 1,192+ owner reports, the 2022 Kia K5 has 23 documented issues. The most frequently reported are: Battery Drain / No-Start After Sitting (Telematics/Module Sleep Issue), Forward Collision Avoidance Assist (FCA) Phantom Braking Events, SmartStream G2.5 GDI Engine Piston Ring/Oil Consumption Issue. Of these, 10 are rated critical and should be addressed promptly.

Is the Kia K5 reliable?

The 2022 Kia K5 has 23 known issues documented across 1,192+ owner reports. 10 issues are rated critical: Battery Drain / No-Start After Sitting (Telematics/Module Sleep Issue) and Forward Collision Avoidance Assist (FCA) Phantom Braking Events and SmartStream G2.5 GDI Engine Piston Ring/Oil Consumption Issue and Electronic Parking Brake (EPB) Warning / Auto-Hold Malfunction and Rear Wheel Bearing Premature Failure and Humming Noise and Transmission Control Unit (TCU) Software Fault Causing Harsh Upshifts or Limp Mode (8-Speed AT) and Windshield Optical/Rain Sensor Bracket Detachment (ADAS/Auto Wipers Inoperative) and Brake Booster / Vacuum Pump Noise and Reduced Brake Assist (1.6T) and Fuel Tank Expansion and Fire Risk and 8-Speed DCT Electric Oil Pump Failure. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.

How much does it cost to fix common Kia K5 problems?

Repair costs for known Kia K5 issues range from $0 to $2,000, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, Battery Drain / No-Start After Sitting (Telematics/Module Sleep Issue), typically costs $180-$1,200 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What is the 2021-2023 Kia K5 Battery Drain / No-Start After Sitting (Telematics/Module Sleep Issue)?

NHTSA complaints and owner reports describe repeated dead 12V batteries and no-start conditions after the vehicle sits for 1–3 days. Reports often point to excessive parasitic draw from modules not entering sleep mode (commonly infotainment/telematics-related) or repeated wake-up… Repairs typically run $180-$1,200. Severity: high.

Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.

Data sourced from 1,192+ owner reports, NHTSA recalls, TSBs, and automotive forums.

Filter:
ALL YEARS20252024202320222021

When Issues Typically Appear

Windshield Optical/Rain Sensor Bracket Detachment (ADAS/Auto Wipers Inoperative)
1K-30K
Battery Drain / No-Start After Sitting (Telematics/Module Sleep Issue)
1K-40K
Forward Collision Avoidance Assist (FCA) Phantom Braking Events
1K-60K
Wireless Phone Charging Pad Overheating and Device Damage
1K-40K
Electronic Parking Brake (EPB) Warning / Auto-Hold Malfunction
3K-60K
Transmission Control Unit (TCU) Software Fault Causing Harsh Upshifts or Limp Mode (8-Speed AT)
5K-60K
Door Handle/Lock Actuator Failure (Door Won’t Open or Won’t Lock/Unlock)
5K-80K
Steering Column/Intermediate Shaft Clunk or Knock (Low-Speed Turns)
5K-50K
Paint Chipping and Clear Coat Peeling (Hood and Roof Panel)
5K-45K
SmartStream G2.5 GDI Engine Piston Ring/Oil Consumption Issue
8K-50K
Front Suspension Strut Mount/Bearing Noise (Creak/Pop While Turning)
8K-70K
Turbocharger Oil Feed/Return Leak (1.6T) Causing Burning Oil Smell/Smoke
8K-70K
025K50K75K100K mi
Community reported
58 owners

On the 2021-2024 Kia K5, k5 models equipped with the 8-speed conventional automatic transmission (paired with the 2.5T Turbo engine in higher trims) have generated complaints of harsh, jerky upshifts—particularly the 1-2 and 2-3 shifts—and in some cases the transmission entering limp mode (restricted to lower gears) after a fault is detected. This is distinct from the DCT shudder issue and specifically affects the hydraulic 8AT unit. TSBs from Kia/Hyundai on the shared 8AT platform have addressed TCU software logic for shift pressure and torque converter clutch engagement.

This issue also affects: Genesis G90

Common Symptoms

  • Hard or jerky upshift felt between 1st-2nd or 2nd-3rd gears
  • Transmission warning light or check engine light illumination
  • Vehicle entering limp mode with limited gear availability
  • Delayed or hunting gear changes during light throttle driving
  • Transmission slipping sensation before engaging next gear

How to Fix

Kia dealers perform TCU reprogramming via KDS (Kia Diagnostic System) using updated calibration files per TSB TR-004 and related bulletins. In cases of internal valve body damage from repeated harsh shifts, valve body replacement or full transmission replacement may be required. TCU software update is typically covered under powertrain warranty. Valve body replacement parts range from $600–$1,200 plus labor.

Research This Issue

Based on 58 owner reports

GoogleRedditYouTubeNHTSA
Community Reported
Medium Confidence58 owner reportsReviewed May 2026

On the 2021-2023 Kia K5 2.5L T-GDI, nHTSA recall 22V760000 (Kia SC250) covers certain 2021-2023 K5 vehicles equipped with the 2.5L T-GDI engine and 8-speed dual-clutch transmission. A supplier soldering defect can cause an internal electric oil-pump circuit-board fault. The vehicle may chime, display “stop safely immediately,” illuminate the malfunction indicator light and then lose motive power when the transmission disengages its drive gears.

Common Symptoms

  • Audible warning chimes
  • “Stop safely immediately” cluster message
  • Malfunction indicator light
  • Loss of motive power

How to Fix

Check the VIN for open recall 22V760000/SC250 and follow Kia's stop-safely warning if it appears. A Kia dealer inspects the vehicle, replaces the transmission when necessary and updates the transmission-control-unit software, free of charge under the recall. Although the recall report identifies oil-pump assembly 46220-2N510, this is not a retail DIY remedy; the campaign repair is VIN-specific and dealer-installed.

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GoogleRedditYouTubeNHTSA
Manually Verified
High ConfidenceVerifiedReviewed Aug 2026

On the 2021-2024 Kia K5 2.5L T-GDI, kia bulletin TRA100 documents clutch judder on some 2021 model year and later K5 GT vehicles equipped with the 2.5L T-GDI engine and 8-speed wet dual-clutch transmission. Kia defines the condition as body vibration, without steering-wheel shudder, during a controlled creep-driving test below 5 mph. The bulletin does not establish a general software defect across all K5 trims or recommend a transmission-fluid flush.

Common Symptoms

  • Body vibration during low-speed creep
  • Judder below approximately 5 mph without steering-wheel shudder

How to Fix

Have a Kia dealer or qualified transmission specialist confirm the vehicle is a K5 GT with the 2.5L T-GDI wet DCT and perform Kia's KDS 8 Wet Type DCT Judder Test. Kia's procedure repeats the creep measurement five times and replaces the dual-clutch assembly only when the test indicates replacement. This is a fitment- and diagnostic-dependent internal transmission repair, so no retail clutch kit or universal ATF is recommended.

Research This Issue

GoogleRedditYouTubeNHTSA
Manually Verified
High ConfidenceVerifiedReviewed Aug 2026
Community reported
134 owners

On the 2021-2024 Kia K5, multiple K5 owners and NHTSA complaints document unexpected, uninitiated hard braking events triggered by the Forward Collision Avoidance Assist system in the absence of any actual obstacle. These phantom braking events occur most commonly on highways, elevated roads, or in areas with overhead signs, bridges, or guardrails that the front radar and camera system misidentifies as collision threats. The issue represents a safety concern as following vehicles may be unable to react in time, increasing rear-end collision risk.

Common Symptoms

  • Sudden hard braking with no obstacle present
  • Forward Collision Warning alert with no vehicle or object ahead
  • FCA system activating on bridges, overpasses, or metal guardrails
  • Brake lights activating unexpectedly at highway speeds
  • FCA warning light remaining on after phantom brake event

How to Fix

Kia has released multiple FCA software calibration updates through dealer reprogramming to improve object discrimination and reduce false positives. TSB reference DAS-007 addresses radar and camera fusion logic updates. Owners should have the forward radar sensor (part of the front bumper radar module) and windshield camera inspected for alignment. In persistent cases, FCA can be temporarily disabled via the Driver Assistance menu, though this is not recommended as a permanent fix.

Research This Issue

Based on 134 owner reports

GoogleRedditYouTubeNHTSA
Community Reported
Medium Confidence134 owner reportsReviewed May 2026

On the 2021-2024 Kia K5, owner reports and NHTSA complaints describe the forward-facing camera/rain sensor bracket at the windshield separating or losing adhesion, which can cause the camera module to shift out of position. This can trigger driver-assistance warnings and disable features like Lane Following Assist/Forward Collision-Avoidance Assist and/or cause erratic automatic wiper behavior. The issue is typically tied to windshield bracket bonding/installation and is often noticed after temperature swings or windshield replacement.

Common Symptoms

  • Lane assist/forward collision warnings and features disabled
  • Automatic wipers stop working or behave erratically
  • Camera calibration/aiming DTCs or calibration failure
  • Rattling/loose module at top center of windshield

How to Fix

Inspect the windshield-mounted bracket and camera/sensor alignment; re-bond/replace the windshield bracket or replace the windshield if the bracket is integral. Reinstall and calibrate the front camera using Kia scan tool procedures; if the windshield was replaced, ensure OEM glass and correct bracket are used. Dealers may reference Kia service guidance/TSB procedures for front camera calibration after windshield/bracket service.

Typical repair cost:$250 - $1,400

Research This Issue

Based on 45 owner reports

GoogleRedditYouTubeNHTSA
Community Reported
Medium Confidence45 owner reportsReviewed Apr 2026
Community reported
70 owners

On the 2021-2024 Kia K5, nHTSA complaints and owner reports note intermittent EPB warnings and Auto-Hold faults on Kia K5, sometimes accompanied by the parking brake not applying/releasing as expected. The issue is commonly linked to EPB actuator/motor faults, wiring/connector issues at the rear calipers, or control module logic faults. Owners typically experience warning messages, chimes, and loss of Auto-Hold functionality.

Common Symptoms

  • EPB warning light/message on cluster
  • Auto-Hold unavailable or turns off unexpectedly
  • Parking brake fails to apply or release
  • Chime and multiple brake/ESC warnings

How to Fix

Scan for EPB/ESC fault history and inspect rear caliper EPB actuators, connectors, and harness routing for corrosion or damage. Replace the affected EPB actuator/caliper assembly if the motor is failing; perform EPB service mode initialization and verify Auto-Hold operation. If applicable, apply Kia software updates per dealer service bulletins addressing EPB/Auto-Hold warnings.

Typical repair cost:$180 - $900

Research This Issue

Based on 70 owner reports

GoogleRedditYouTubeNHTSA
Community Reported
Medium Confidence70 owner reportsReviewed Apr 2026

On the 2021-2024 Kia K5, on 1.6T turbocharged K5 variants, some owners and NHTSA complainants have reported a hissing sound from the brake booster area upon brake pedal application, accompanied by a noticeably harder brake pedal and reduced power assistance. The GDi turbocharged engine uses an electric vacuum pump to supplement braking assist; failures or leaks in the vacuum pump, vacuum check valve, or booster hose connection reduce available vacuum and compromise brake pedal feel and stopping distance. This has been flagged as a safety concern in NHTSA filings.

Common Symptoms

  • Hissing sound when brake pedal is pressed
  • Hard or stiff brake pedal requiring significantly more force to stop
  • Longer stopping distances than normal
  • Brake warning light or low vacuum warning illumination
  • Brake pedal feel improving after engine warms up then worsening again

How to Fix

Inspection of the vacuum pump, vacuum reservoir, check valve, and all vacuum lines connecting to the brake booster is required. The electric vacuum pump (Kia/Mobis part number 59100-L2000 or per VIN) may require replacement if output is below specification. The vacuum check valve (a common failure point) is a lower-cost item at approximately $20–$50. Full vacuum pump replacement is $300–$700 parts and labor.

What you need to fix it

Only diagnosis- and fitment-reviewed repair parts are linked here.

  • Genuine Kia 28810-2M810 mechanical brake-vacuum pump
    OEMKia 28810-2M810, superseded by 28810-2M831

    Replace the engine-driven pump after a vacuum-output test confirms pump failure Fitment/availability: 2021-2024 Kia K5 with 1.6L Gamma-II turbo; seller shows supersession to 28810-2M831. Confirm VIN and current EPC before ordering, and d…

    KiaPartsNow

As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.

Typical repair cost:$50 - $900

Research This Issue

Based on 31 owner reports

GoogleRedditYouTubeNHTSA
Community Reported
Medium Confidence31 owner reportsReviewed May 2026
Community reported
160 owners

On the 2021-2023 Kia K5, nHTSA complaints and owner reports describe repeated dead 12V batteries and no-start conditions after the vehicle sits for 1–3 days. Reports often point to excessive parasitic draw from modules not entering sleep mode (commonly infotainment/telematics-related) or repeated wake-ups. Owners experience jump-start needs, battery replacements, and intermittent recurrence.

Common Symptoms

  • No-crank/no-start after sitting overnight or a few days
  • Repeated jump-starts required
  • Battery warning or low-voltage behavior (dim lights, resets)
  • Intermittent recurrence after battery replacement

How to Fix

Perform parasitic draw testing with an ammeter and isolate the circuit causing draw; check for module wake events and apply Kia software updates where available. Replace the 12V battery if it has been deeply discharged multiple times, and repair/replace the offending module (often telematics/infotainment-related) if it fails to sleep. Verify current draw meets Kia specifications after repairs.

What you need to diagnose it

The fix here starts with a test, not a part — which repair you need depends on what the test finds.

  • UNI-T UT210E Low-Current DC Clamp Meter

    1 mA resolution on the 2 A range — a 0.1 A meter reads a 50 mA drain as zero

    $40–$70View

As an Amazon Associate, we earn from qualifying purchases. Prices are approximate and may vary.

Testing and isolating the fault is DIY work. Replacing or reprogramming a control module is not — most are VIN-programmed, so a new one does nothing until a shop codes it to your car. Check for an open recall or service bulletin before buying anything.

What you need to fix it

Only diagnosis- and fitment-reviewed repair parts are linked here.

  • DieHard Platinum AGM H6/Group 48 battery, 70 Ah, 760 CCA
    OEMDieHard H6-AGM

    Conditional replacement after the draw is repaired and the original battery fails a post-charge test Fitment/availability: 2021-2023 Kia K5 only after confirming the installed battery is H6/Group 48 AGM, 70 Ah and 760 CCA with matching d…

    Advance Auto Parts

As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.

Typical repair cost:$180 - $1,200

Research This Issue

Based on 160 owner reports

GoogleRedditYouTubeNHTSA
Community Reported
Medium Confidence160 owner reportsReviewed Apr 2026

On the 2021-2023 Kia K5, k5 models equipped with the optional wireless charging pad have generated NHTSA complaints and owner forum reports describing the pad running excessively hot during charging cycles, causing smartphones to display thermal warnings and in some cases warping or discoloring the charging pad surface. The issue appears related to inadequate thermal management in the Qi charging module integrated into the center console. Kia issued a software update for the UVO telematics/charging control module on some vehicles to limit charging output and improve thermal cutoff response.

Common Symptoms

  • Smartphone displays overheating warning while on charging pad
  • Charging pad surface becomes uncomfortably hot to touch
  • Discoloration or warping of charging pad surface
  • Phone charges slowly or intermittently due to thermal throttling
  • Charging pad ceases functioning after thermal shutdown event

How to Fix

Kia dealers can apply a software update to the wireless charging control module addressing thermal limits per internal service guidance. If the pad surface is physically damaged, the center console wireless charging module assembly requires replacement. Owners experiencing device damage should document and file with Kia Customer Assistance for consideration of device compensation.

Research This Issue

Based on 47 owner reports

GoogleRedditYouTubeNHTSA
Community Reported
Medium Confidence47 owner reportsReviewed May 2026

On the 2021-2025 Kia K5, the Advanced Driver Assistance Systems on the K5 — including Lane Keep Assist, Forward Collision Avoidance, and Blind Spot Monitoring — intermittently throw calibration faults and disable themselves. The forward-facing camera behind the windshield and radar sensor in the front bumper are sensitive to windshield contamination, extreme temperatures, and minor front-end impacts. After a windshield replacement, the ADAS sensors require recalibration that many glass shops skip or perform incorrectly.

This issue also affects: Genesis G70

Common Symptoms

  • Lane Keep Assist warning light and system disabled
  • Forward Collision warning malfunction message
  • Blind Spot Monitor not functioning
  • Multiple ADAS warning lights on dashboard
  • Systems disabling in rain, fog, or extreme cold
  • Phantom braking from Forward Collision system

How to Fix

For intermittent faults in normal conditions: clean the windshield interior and exterior thoroughly around the camera area. Ensure the camera lens cover behind the rearview mirror is clean and unobstructed. A dealer scan and ADAS recalibration costs $200-$500. After windshield replacement, ALWAYS have the ADAS camera recalibrated at a Kia dealer — this requires specialized targets and equipment. If faults persist, the camera module or radar sensor may need replacement ($500-$1,500).

Owner tips & cautions

  • WarningIf you get your windshield replaced, INSIST on ADAS recalibration. The camera must be recalibrated to the new windshield or your safety systems will not function correctly. Budget $300-$500 for this.
Typical repair cost:$0 - $1,500

Research This Issue

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Community Reported
Medium Confidence

On the 2021-2025 Kia K5, the K5 infotainment system — both the 8-inch and 10.25-inch displays — experiences random screen blackouts, freezes, and spontaneous reboots. The screen may go completely black while driving, losing access to navigation, backup camera, and climate controls. Some owners report the system rebooting in a loop. The issue is typically software-related but can also be caused by a failing display head unit. Android Auto and Apple CarPlay connections can trigger or worsen the problem.

Common Symptoms

  • Infotainment screen goes completely black while driving
  • System freezes and becomes unresponsive to touch
  • Screen reboots with Kia logo repeatedly
  • Backup camera unavailable when in reverse
  • Bluetooth audio cutting out
  • Climate controls unresponsive on touchscreen-only models

How to Fix

First try a system reset by holding the power/volume knob for 10+ seconds. Visit a Kia dealer for the latest infotainment software update — Kia has released multiple updates addressing stability issues (check for updates via the Kia Connect app or USB update). If the software update does not resolve the issue, the head unit may need replacement under warranty ($800-$2,000 if out of warranty). Disconnect the phone and disable wireless CarPlay/Android Auto to test if the issue is phone-related. A factory reset of the infotainment (Settings > General > Reset) can also help.

Owner tips & cautions

  • TipBefore going to the dealer, try a USB software update. Download the latest navigation/infotainment update from the Kia owners portal, put it on a USB drive, and install it. Many blackout issues are fixed by the latest software.
  • TipIf the screen goes black, hold the power knob for 10 seconds to force a reboot. This is faster than disconnecting the battery and usually restores the system immediately.
Typical repair cost:$0 - $2,000

Research This Issue

GoogleRedditYouTubeNHTSA
Community Reported
High Confidence
Community reported
85 owners

On the 2021-2024 Kia K5, owners of K5 models equipped with the 2.5L naturally aspirated GDI engine (SmartStream G2.5) have reported excessive oil consumption between change intervals, sometimes consuming over a quart per 1,000 miles. The root cause is linked to piston ring sealing tolerances that allow oil to enter the combustion chamber, producing blue smoke from the exhaust on cold starts and acceleration. NHTSA complaint database reflects multiple owners reporting this on 2021-2023 model years, with Kia issuing TSB guidance for inspection and potential short block replacement.

This issue also affects: Genesis G70, Genesis GV80

Common Symptoms

  • Blue/white smoke from exhaust on cold start or hard acceleration
  • Low oil level warning light before scheduled oil change
  • Fouled spark plugs causing rough idle
  • Burning oil smell from engine bay
  • Oil level dropping more than 1 quart per 1,000 miles

How to Fix

Kia dealerships perform an oil consumption test over 3,000-mile intervals per TSB ENG 023. If consumption exceeds specification, piston rings or short block assembly replacement is authorized under warranty. Short block part numbers vary by build date; dealers reference Kia's warranty claim system. Out-of-warranty repair involves short block replacement costing $3,500–$6,000.

Research This Issue

Based on 85 owner reports

GoogleRedditYouTubeNHTSA
Community Reported
Medium Confidence85 owner reportsReviewed May 2026

On the 2021-2024 Kia K5 1.6T, owner reports and NHTSA complaints on 1.6L turbo K5 models describe oil seepage/leaks around the turbocharger oil feed/return lines or related seals, sometimes producing a burning oil smell and light smoke after driving. Heat cycling can harden seals or loosen fittings, allowing oil to drip onto hot exhaust components. Owners typically notice odor in the cabin at stops and oil residue near the turbo area.

Common Symptoms

  • Burning oil smell after driving
  • Light smoke from engine bay near turbo area
  • Oil residue around turbocharger lines
  • Gradual oil level drop between services

How to Fix

Inspect turbo oil feed and return lines, banjo bolts, and sealing washers/gaskets for seepage; clean and recheck after a drive. Replace leaking oil line assemblies and sealing washers/gaskets (commonly crush washers at banjo fittings) and torque to specification; verify no oil contacts the exhaust. After repair, monitor oil level and confirm no further smoke/odor.

What you need to fix it

Only diagnosis- and fitment-reviewed repair parts are linked here.

  • Genuine Kia 28240-2M810 turbocharger oil feed tube
    OEMKia 28240-2M810

    Replace a cracked restricted or leaking 1.6T turbo oil feed line Fitment/availability: 2021-2024 Kia K5 1.6T feed-line branch; confirm VIN/current EPC and purchase all service-manual-required gaskets/washers before installation.

    Kia OEM Parts Online
  • Genuine Kia 28248-2M800 turbocharger oil return tube
    OEMKia 28248-2M800

    Replace a cracked distorted or leaking 1.6T turbo oil return line Fitment/availability: 2021-2024 Kia K5 1.6T return-line branch; confirm VIN/current EPC and replace both return gaskets when disturbed.

    Kia OEM Parts Online
  • Genuine Kia 28241-2B710 turbo oil feed tube gasket
    OEMKia 28241-2B710

    Renew the feed-line gasket whenever that sealed joint is opened Fitment/availability: 2021-2024 Kia K5 1.6T feed connection; confirm exact joint location, quantity and current EPC before purchase.

    Kia OEM Parts Online
  • Genuine Kia 28246-2B710 turbo oil return gasket at turbo
    OEMKia 28246-2B710

    Renew the upper return-line gasket whenever the return tube is removed Fitment/availability: 2021-2024 Kia K5 1.6T oil return tube at turbo connection; confirm VIN/current EPC and quantity before purchase.

    Kia OEM Parts Online
  • Genuine Kia 28247-2B700 turbo oil return gasket at engine
    OEMKia 28247-2B700

    Renew the lower return-line gasket whenever the return tube is removed Fitment/availability: 2021-2024 Kia K5 1.6T oil return tube at engine connection; confirm VIN/current EPC and quantity before purchase.

    Kia OEM Parts Online

As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.

Typical repair cost:$220 - $1,200

Research This Issue

Based on 35 owner reports

GoogleRedditYouTubeNHTSA
Community Reported
Medium Confidence35 owner reportsReviewed Apr 2026

On the 2021-2025 Kia K5 2.5L Theta II, the 2.5L Theta II engine in certain K5 models has experienced knock sensor faults and engine knock concerns. The knock sensor may trigger false positives or fail to detect actual detonation, causing the ECU to either retard timing unnecessarily (reducing power) or fail to protect against harmful knock. Kia issued a software update to improve knock detection logic, but some owners report persistent issues after the update.

Common Symptoms

  • Check engine light with knock sensor codes
  • Reduced engine power or sluggish acceleration
  • Audible pinging or knocking under load
  • Poor fuel economy from excessive timing retard
  • Engine hesitation during acceleration

How to Fix

Visit a Kia dealer for the latest ECU software update (TSB SA508) that improves knock detection calibration — this is typically performed at no cost. If the knock sensor itself has failed, replacement costs $200-$400 including labor. Use only 87+ octane fuel as specified. If actual engine knock is present (metallic pinging under load), have the engine inspected immediately as the Theta II engine family has a known history of connecting rod bearing issues in earlier applications. Kia has extended warranty coverage on some Theta II engines.

Owner tips & cautions

  • TipCheck if your VIN is covered under the Kia engine warranty extension. Many Theta II engines have extended coverage to 150,000 miles for knock-related failures.
  • TipRequest the latest ECU calibration update at every service visit. Kia has released multiple updates to improve knock detection and engine protection logic.
Typical repair cost:$0 - $400

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On the 2021-2024 Kia K5, a number of K5 owners have reported premature rear wheel bearing failure, typically presenting as a low-pitched humming or growling noise that changes with vehicle speed and varies when turning left or right. The issue has been observed on both FWD and AWD variants and appears linked to bearing press-fit tolerances in the rear knuckle assembly. NHTSA complaints and owner forums document failures occurring well before expected service life, sometimes as early as 25,000 miles.

Common Symptoms

  • Humming or growling noise that increases with vehicle speed
  • Noise changes pitch or volume when turning or changing lanes
  • Vibration felt through floorboard or seat at highway speeds
  • ABS or traction control warning light illumination (in advanced cases)
  • Looseness or play detected at wheel during inspection

How to Fix

Replacement of the rear wheel bearing/hub assembly is required. The rear bearing is an integrated hub unit (Kia part number 52730-L1000 or equivalent by production date). Labor requires knuckle removal; dealership or independent repair is approximately 1.5–2 hours per side. AWD variants may require additional drivetrain disassembly.

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Call to confirm they service Kia vehicles and check your VIN, recall eligibility, parts availability, and appointment options.

What you need to fix it

Only diagnosis- and fitment-reviewed repair parts are linked here.

  • Genuine Kia 52730-L1000 FWD rear hub and bearing assembly
    OEMKia 52730-L1000

    Replace a confirmed noisy rough or loose rear hub on a front-wheel-drive K5 Fitment/availability: 2021-2024 Kia K5 FWD with 1.6L or 2.5L engine, left or right rear; confirm VIN/current EPC and required hardware before purchase.

    Kia OEM Parts Online
  • Genuine Kia 52730-N9000 AWD rear hub and bearing assembly
    OEMKia 52730-N9000

    Replace a confirmed noisy rough or loose rear hub on an all-wheel-drive K5 Fitment/availability: 2021-2024 Kia K5 AWD with 1.6L engine, left or right rear; confirm VIN/current EPC and required axle/hub hardware before purchase.

    Kia OEM Parts Online

As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.

Typical repair cost:$250 - $650

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Based on 62 owner reports

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Community Reported
Medium Confidence62 owner reportsReviewed May 2026
Community reported
110 owners

On the 2021-2024 Kia K5, kia K5 owners report creaking, popping, or groaning noises from the front suspension during steering input, especially at low speeds or when parking. The issue is often tied to strut mount bearings binding or premature wear, sometimes exacerbated by moisture intrusion. The noise can be mistaken for steering rack issues but is frequently localized to the upper strut mounts.

Common Symptoms

  • Creaking/groaning when turning steering wheel
  • Popping noise during parking maneuvers
  • Noise more noticeable in wet/cold conditions
  • Front-end noise over low-speed bumps

How to Fix

Confirm noise source with chassis ears and inspect upper strut mounts and bearings for binding or damage. Replace the affected strut mount/bearing assemblies and verify proper spring indexing; perform alignment afterward. If present, address water intrusion and ensure correct torque on top mount hardware.

What you need to fix it

Only diagnosis- and fitment-reviewed repair parts are linked here.

  • Genuine Kia 54612-L1000 front strut bearing
    OEMKia 54612-L1000

    Replace a diagnosed binding or damaged front strut bearing Fitment/availability: 2021-2024 Kia K5, front left or right; confirm VIN/current EPC and required quantity before purchase.

    Kia.Parts
  • Genuine Kia 54610-L0000 front strut mount for 1.6L
    OEMKia 54610-L0000

    Replace a diagnosed torn collapsed or loose upper mount on the 1.6L branch Fitment/availability: 2021-2024 Kia K5 with 1.6L engine, front left or right; confirm VIN and current EPC before purchase.

    Kia OEM Parts Online
  • Genuine Kia 54610-L0100 front strut mount for 2.5L turbo
    OEMKia 54610-L0100

    Replace a diagnosed torn collapsed or loose upper mount on the 2.5T GT branch Fitment/availability: 2021-2024 Kia K5 GT with 2.5L turbo, front left or right; confirm VIN and current EPC before purchase.

    Kia OEM Parts Online

As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.

Typical repair cost:$250 - $900

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Based on 110 owner reports

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Community Reported
Medium Confidence110 owner reportsReviewed Apr 2026
Community reported
85 owners

On the 2021-2023 Kia K5, owner reports and NHTSA complaints describe a clunk/knock felt through the steering wheel during low-speed turning or over small bumps. The condition is commonly associated with play in the intermediate steering shaft, column coupling, or related fasteners/bushings. Drivers report a noticeable tactile knock and noise that can worsen over time.

Common Symptoms

  • Clunk/knock in steering wheel at low speed
  • Noise when turning into driveways/parking maneuvers
  • Vibration or looseness felt through steering
  • Intermittent clicking over small bumps

How to Fix

Inspect the intermediate shaft and steering column coupling for play and verify torque on related fasteners. Replace the intermediate steering shaft/coupler if excessive looseness is found; some repairs involve updated parts and re-torque procedures per Kia service guidance. Perform an alignment check after steering component replacement.

What you need to fix it

Only diagnosis- and fitment-reviewed repair parts are linked here.

  • Genuine Kia 56400-L0000 lower/intermediate steering shaft
    OEMKia 56400-L0000

    Replace a lower shaft with confirmed joint or spline play on the 1.6L non-GT branch Fitment/availability: 2021-2023 Kia K5 with 1.6L engine and non-GT column-mounted steering; confirm VIN/current EPC and required new pinch bolts before p…

    Kia OEM Parts Online

As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.

Typical repair cost:$120 - $650

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Based on 85 owner reports

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Community Reported
Medium Confidence85 owner reportsReviewed Apr 2026

On the 2021-2023 Kia K5 1.6L T-GDI, nHTSA recall 25V794000 (Kia SC356) covers 2021-2024 K5 vehicles equipped with the 1.6L T-GDI engine. A deteriorated purge-control-system check valve can allow pressurized intake air into the fuel tank. The tank can expand, contact hot exhaust components and locally melt, which can cause a fuel leak and increase fire risk. Warning signs can include a popping sound near the tank, a check-engine light or rough running.

Common Symptoms

  • Popping sound from fuel-tank area
  • Check-engine light
  • Rough running
  • Expanded or leaking fuel tank

How to Fix

Check the VIN for recall 25V794000/SC356. A Kia dealer replaces the check valve with the improved design, inspects the fuel tank for damage, replaces the tank when necessary and confirms the latest ECU software, free of charge. Do not buy a generic fuel tank or check valve from this page; the recall repair is VIN-, engine- and inspection-specific.

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Call to confirm they service Kia vehicles and check your VIN, recall eligibility, parts availability, and appointment options.

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High ConfidenceVerifiedReviewed Aug 2026
Community reported
95 owners

On the 2021-2024 Kia K5, owner reports and NHTSA complaints note exterior door handles and/or door lock actuators failing, leading to doors that won’t open from outside (and sometimes inside) or won’t lock/unlock reliably. Failures are commonly tied to actuator motor wear, latch mechanism binding, or linkage issues inside the door. Owners often report intermittent operation that progresses to complete failure.

Common Symptoms

  • Door won’t open from outside
  • Intermittent lock/unlock operation
  • Key fob works but door remains locked
  • Grinding/clicking noise inside door when locking

How to Fix

Remove door trim panel and inspect latch/handle linkage and actuator operation. Replace the failed door lock actuator and/or latch assembly and verify proper cable/rod adjustment; lubricate latch mechanisms. If the exterior handle mechanism is damaged, replace the handle assembly and confirm keyless entry operation.

What you need to fix it

Only diagnosis- and fitment-reviewed repair parts are linked here.

  • Genuine Kia 81310-L3000 front-left lock actuator without smart key
    OEMKia 81310-L3000

    Replace the diagnosed driver-front latch/actuator on a non-smart-key car Fitment/availability: 2021-2024 Kia K5, front left/driver side, without smart key; verify VIN and existing label before purchase.

    Kia OEM Parts Online
  • Genuine Kia 81310-L3010 front-left lock actuator with smart key
    OEMKia 81310-L3010

    Replace the diagnosed driver-front latch/actuator on a smart-key car Fitment/availability: 2021-2024 Kia K5, front left/driver side, with smart key; verify VIN and existing label before purchase.

    Kia OEM Parts Online
  • Genuine Kia 81320-L3000 front-right lock actuator without smart key
    OEMKia 81320-L3000

    Replace the diagnosed passenger-front latch/actuator on a non-smart-key car Fitment/availability: 2021-2024 Kia K5, front right/passenger side, without smart key; verify VIN and existing label before purchase.

    Kia OEM Parts Online
  • Genuine Kia 81320-L3010 front-right lock actuator with smart key
    OEMKia 81320-L3010

    Replace the diagnosed passenger-front latch/actuator on a smart-key car Fitment/availability: 2021-2024 Kia K5, front right/passenger side, with smart key; verify VIN and existing label before purchase.

    Kia OEM Parts Online
  • Genuine Kia 81410-L3000 rear-left lock actuator without power safety lock
    OEMKia 81410-L3000

    Replace the diagnosed driver-rear latch/actuator without the power-safety-lock option Fitment/availability: 2021-2024 Kia K5, rear left/driver side, without power safety lock; verify VIN, option and existing label before purchase.

    Kia OEM Parts Online
  • Genuine Kia 81410-L3010 rear-left lock actuator with power safety lock
    OEMKia 81410-L3010

    Replace the diagnosed driver-rear latch/actuator with the power-safety-lock option Fitment/availability: 2021-2024 Kia K5, rear left/driver side, with power safety lock; verify VIN, option and existing label before purchase.

    Kia OEM Parts Online
  • Genuine Kia 81420-L3000 rear-right lock actuator without power safety lock
    OEMKia 81420-L3000

    Replace the diagnosed passenger-rear latch/actuator without the power-safety-lock option Fitment/availability: 2021-2024 Kia K5, rear right/passenger side, without power safety lock; verify VIN, option and existing label before purchase.

    Kia OEM Parts Online
  • Genuine Kia 81420-L3010 rear-right lock actuator with power safety lock
    OEMKia 81420-L3010

    Replace the diagnosed passenger-rear latch/actuator with the power-safety-lock option Fitment/availability: 2021-2024 Kia K5, rear right/passenger side, with power safety lock; verify VIN, option and existing label before purchase.

    Kia OEM Parts Online

As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.

Typical repair cost:$180 - $650

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Based on 95 owner reports

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Community Reported
Medium Confidence95 owner reportsReviewed Apr 2026
Community reported
76 owners

On the 2021-2024 Kia K5, k5 owners across multiple model years have reported premature paint chipping on the hood and roof panels, with the clear coat peeling in flakes or bubbling in affected areas. This is documented in Kia owner forums and in some NHTSA complaints, particularly in darker colors such as Gravity Gray and Aurora Black Pearl. The issue is attributed to insufficient paint film thickness or adhesion on horizontal panels most exposed to UV radiation and road debris impact, and is a known issue on the shared Sonata/K5 platform. Some owners have had repaints or touch-up coverage denied under warranty as cosmetic exclusions.

Common Symptoms

  • Small paint chips on hood leading edge without identifiable rock impact
  • Clear coat peeling or flaking from roof or hood in irregular patches
  • Bubbling or lifting of clear coat under sunlight
  • Color fading or hazing on horizontal panels disproportionate to age
  • Rust spotting developing at paint chip locations in humid climates

How to Fix

Kia's new vehicle limited warranty covers paint defects for 3 years or 36,000 miles; owners experiencing premature peeling within this window should request a paint warranty claim at the dealership with documentation. Out-of-warranty repairs require professional repaint of affected panels; hood repaint costs $400–$900 and full roof repaint $500–$1,200 at a body shop. Paint protection film (PPF) application proactively prevents recurrence.

Find a Kia dealer

Choose to share your location for this search, or enter an area below. Your search location is sent to Google to find dealers.

Open Kia dealer map in Google Maps ↗

Call to confirm they service Kia vehicles and check your VIN, recall eligibility, parts availability, and appointment options.

Typical repair cost:$200 - $1,800

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Based on 76 owner reports

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Community Reported
Medium Confidence76 owner reportsReviewed May 2026

On the 2021-2025 Kia K5, the electric trunk latch mechanism on the K5 is prone to sticking or failing to release, leaving the trunk locked. The issue is more common in cold weather when moisture gets into the latch mechanism and freezes. The trunk release button on the key fob, interior button, and exterior trunk handle may all fail to open the trunk when the latch is stuck. Some owners report the latch actuator motor failing entirely, requiring manual release from inside the trunk via the emergency release handle.

Common Symptoms

  • Trunk will not open from key fob button
  • Interior trunk release button unresponsive
  • Trunk latch clicks but does not release
  • Trunk opens intermittently or requires multiple presses
  • Trunk stuck closed in cold weather

How to Fix

Lubricate the trunk latch mechanism with white lithium grease or silicone spray every 6 months to prevent sticking ($5-$10). If the latch actuator motor has failed, replace the entire trunk latch assembly ($100-$200 for parts, $100-$200 labor). In an emergency, access the trunk from the rear seat pass-through or use the emergency release handle inside the trunk. The dealer can reprogram the trunk open/close module if the issue is software-related. Apply dielectric grease to the latch electrical connector to prevent corrosion.

What you need to fix it

Only diagnosis- and fitment-reviewed repair parts are linked here.

  • Genuine Kia 81230-L0000 trunk-lid latch assembly
    OEMKia 81230-L0000

    Replace a mechanically or electrically failed trunk latch after command and alignment diagnosis Fitment/availability: 2021-2024 Kia K5 trunk lid; confirm VIN/current EPC before purchase.

    Kia OEM Parts Online
  • Genuine Kia 81230-L8000 trunk-lid latch assembly
    OEMKia 81230-L8000

    Replace a mechanically or electrically failed trunk latch on the facelift branch Fitment/availability: 2025 Kia K5 trunk lid; confirm VIN/current EPC before purchase.

    Kia OEM Parts Online

As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.

Owner tips & cautions

  • TipSpray the trunk latch with silicone lubricant before winter. This prevents moisture from freezing the mechanism shut in cold weather. Takes 30 seconds and saves a lot of frustration.
Typical repair cost:$10 - $400

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On the 2021-2024 Kia K5, k5 owners report blower motors that begin squealing, chirping, or rattling and may intermittently stop, reducing cabin airflow. The condition is typically caused by blower motor bearing wear, debris intrusion, or resistor/control issues depending on trim. Symptoms often start as noise at certain fan speeds and progress to reduced or no airflow.

Common Symptoms

  • Squealing/chirping from passenger-side dash
  • Rattling noise that changes with fan speed
  • Intermittent or no airflow from vents
  • Burning smell or hot resistor symptoms (in some cases)

How to Fix

Inspect cabin air filter housing and blower for debris; replace the cabin filter if restricted. Replace the blower motor assembly if bearings are noisy or the motor is intermittent; if speed control is erratic, test/replace the blower resistor or blower control module as applicable. Verify HVAC operation across all speeds after repair.

What you need to fix it

Only diagnosis- and fitment-reviewed repair parts are linked here.

  • Genuine Kia 97113-L1100 HVAC blower motor with impeller
    OEMKia 97113-L1100

    Replace the cabin blower after debris removal and electrical/current tests confirm motor or bearing failure Fitment/availability: 2021-2024 Kia K5 with 1.6L or 2.5L engine; confirm VIN/current EPC before purchase.

    Kia.Parts
  • Genuine Kia 97133-L1000 cabin air filter
    OEMKia 97133-L1000

    Replace a visibly restricted or due cabin filter during blower inspection Fitment/availability: 2021-2024 Kia K5 with 1.6L or 2.5L engine; maintenance/airflow branch only and not a repair for an electrically failed or noisy motor.

    KiaPartsNow

As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.

Typical repair cost:$120 - $550

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Based on 60 owner reports

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Medium Confidence60 owner reportsReviewed Apr 2026

On the 2021-2024 Kia K5, k5 owners with heated and ventilated seat packages have reported failures of the seat heating elements—particularly in the rear seat areas—as well as ventilation fan noise or complete fan failure in the front seats. Seat heating elements can develop open circuits causing partial or complete loss of heat, often on one side of the seat. Ventilated seat blower motors have been reported to produce rattling or grinding noises, sometimes from debris infiltration or motor bearing wear, a known issue documented on multiple Kia and Hyundai shared platforms.

Common Symptoms

  • Seat heat indicator lit but seat not warming, or only partial warming
  • Grinding or rattling noise from seat base during ventilation use
  • Ventilated seat providing no airflow despite being activated
  • Seat heat or ventilation function cutting off intermittently
  • One zone of heated seat (cushion or back) working while other does not

How to Fix

For failed heating elements, the seat cushion or seatback heater mat assembly must be replaced; front seat heater mats are accessed by removing seat upholstery (Kia part numbers 88350-L3010 / 88360-L3010 for cushion/back heater pads, vary by trim). For ventilation fan noise, the blower motor within the seat frame is replaced; dealers reference seat disassembly procedures in KDS. Labor is significant due to seat upholstery removal.

What you need to fix it

Only diagnosis- and fitment-reviewed repair parts are linked here.

  • Genuine Kia 88170-L3000 front seat cushion heater without ventilation
    OEMKia 88170-L3000

    Replace an open front cushion element on the diagnosed non-ventilated seat branch Fitment/availability: 2021-2024 Kia K5 front seat cushion without ventilation, power-seat type 1; catalog position data emphasizes left, so confirm seat si…

    Kia OEM Parts Online
  • Genuine Kia 88170-L3010 front seat cushion heater with ventilation
    OEMKia 88170-L3010

    Replace an open front cushion element on the diagnosed ventilated-seat branch Fitment/availability: 2021-2024 Kia K5 front seat cushion with ventilation, power-seat type 2; confirm seat side, VIN and current EPC before purchase.

    Kia OEM Parts Online
  • Genuine Kia 88370-L3000 front seat-back heater without ventilation
    OEMKia 88370-L3000

    Replace an open front seat-back element on a non-ventilated seat Fitment/availability: 2021-2024 Kia K5 front seat back without ventilation; used across manual/power front-seat branches, but confirm side, VIN and current EPC before purch…

    Kia OEM Parts Online
  • Genuine Kia 88370-L3010 front seat-back heater with ventilation
    OEMKia 88370-L3010

    Replace an open front seat-back element on a ventilated seat Fitment/availability: 2021-2024 Kia K5 front seat back with ventilation; used across manual/power front-seat branches, but confirm side, VIN and current EPC before purchase.

    Kia OEM Parts Online
  • Genuine Kia 881P0-L1100 ventilated-seat blower motor
    OEMKia 881P0-L1100

    Replace a commanded ventilated-seat blower that is noisy seized or electrically failed Fitment/availability: 2021-2024 Kia K5 ventilated front-seat option branch only; catalog descriptions vary by seat side and occupant-classification/na…

    Kia OEM Parts Online

As an Amazon Associate, we earn from qualifying purchases; other part links may also earn au7o a commission. Confirm fitment by VIN before buying.

Typical repair cost:$150 - $850

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Based on 39 owner reports

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Community Reported
Medium Confidence39 owner reportsReviewed May 2026

AIR BAGS: AIR BAG/RESTRAINT CONTROL MODULE

Kia Motors America (Kia) is recalling certain 2021 Telluride, K5, and Forte vehicles. The Occupant Classification and Detection System (OCS/ODS) unit may not detect the presence of a child restraint system in the front passenger seat. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 208, "Occupant Crash Protection."

Campaign #21V16400011/03/2021

FUEL SYSTEM, GASOLINE:DELIVERY:HOSES, LINES/PIPING, AND FITTINGS

Kia Motor America (Kia) is recalling certain 2021 Sorento and 2021-2022 K5 vehicles equipped with 2.5L turbocharged engines. Fuel may leak at the pipe connection between the high-pressure fuel pump and fuel rail.

Campaign #21V51900008/07/2021

+ 3 more recalls. Check all on NHTSA.gov

Enter your VIN at NHTSA.gov to check recalls specific to your vehicle.

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What is the 2021-2024 Kia K5 Forward Collision Avoidance Assist (FCA) Phantom Braking Events?

Multiple K5 owners and NHTSA complaints document unexpected, uninitiated hard braking events triggered by the Forward Collision Avoidance Assist system in the absence of any actual obstacle. These phantom braking events occur most commonly on highways, elevated roads, or in areas… Severity: high.

What is the 2021-2024 Kia K5 SmartStream G2.5 GDI Engine Piston Ring/Oil Consumption Issue?

Owners of K5 models equipped with the 2.5L naturally aspirated GDI engine (SmartStream G2.5) have reported excessive oil consumption between change intervals, sometimes consuming over a quart per 1,000 miles. The root cause is linked to piston ring sealing tolerances that allow o… Severity: high.

What is the 2021-2024 Kia K5 Electronic Parking Brake (EPB) Warning / Auto-Hold Malfunction?

NHTSA complaints and owner reports note intermittent EPB warnings and Auto-Hold faults on Kia K5, sometimes accompanied by the parking brake not applying/releasing as expected. The issue is commonly linked to EPB actuator/motor faults, wiring/connector issues at the rear calipers… Repairs typically run $180-$900. Severity: high.

What is the 2021-2024 Kia K5 Rear Wheel Bearing Premature Failure and Humming Noise?

A number of K5 owners have reported premature rear wheel bearing failure, typically presenting as a low-pitched humming or growling noise that changes with vehicle speed and varies when turning left or right. The issue has been observed on both FWD and AWD variants and appears li… Repairs typically run $250-$650. Severity: high.

What is the 2021-2024 Kia K5 Transmission Control Unit (TCU) Software Fault Causing Harsh Upshifts or Limp Mode (8-Speed AT)?

K5 models equipped with the 8-speed conventional automatic transmission (paired with the 2.5T Turbo engine in higher trims) have generated complaints of harsh, jerky upshifts—particularly the 1-2 and 2-3 shifts—and in some cases the transmission entering limp mode (restricted to… Severity: high.

What is the 2021-2024 Kia K5 Windshield Optical/Rain Sensor Bracket Detachment (ADAS/Auto Wipers Inoperative)?

Owner reports and NHTSA complaints describe the forward-facing camera/rain sensor bracket at the windshield separating or losing adhesion, which can cause the camera module to shift out of position. This can trigger driver-assistance warnings and disable features like Lane Follow… Repairs typically run $250-$1,400. Severity: high.

What is the 2021-2024 Kia K5 Brake Booster / Vacuum Pump Noise and Reduced Brake Assist (1.6T)?

On 1.6T turbocharged K5 variants, some owners and NHTSA complainants have reported a hissing sound from the brake booster area upon brake pedal application, accompanied by a noticeably harder brake pedal and reduced power assistance. The GDi turbocharged engine uses an electric v… Repairs typically run $50-$900. Severity: high.

What is the 2021-2023 Kia K5 Fuel Tank Expansion and Fire Risk?

NHTSA recall 25V794000 (Kia SC356) covers 2021-2024 K5 vehicles equipped with the 1.6L T-GDI engine. A deteriorated purge-control-system check valve can allow pressurized intake air into the fuel tank. The tank can expand, contact hot exhaust components and locally melt, which ca… Severity: high.

What is the 2021-2023 Kia K5 8-Speed DCT Electric Oil Pump Failure?

NHTSA recall 22V760000 (Kia SC250) covers certain 2021-2023 K5 vehicles equipped with the 2.5L T-GDI engine and 8-speed dual-clutch transmission. A supplier soldering defect can cause an internal electric oil-pump circuit-board fault. The vehicle may chime, display “stop safely i… Severity: high.

What is the 2021-2024 Kia K5 Front Suspension Strut Mount/Bearing Noise (Creak/Pop While Turning)?

Kia K5 owners report creaking, popping, or groaning noises from the front suspension during steering input, especially at low speeds or when parking. The issue is often tied to strut mount bearings binding or premature wear, sometimes exacerbated by moisture intrusion. The noise… Repairs typically run $250-$900. Severity: medium.

What is the 2021-2024 Kia K5 Door Handle/Lock Actuator Failure (Door Won’t Open or Won’t Lock/Unlock)?

Owner reports and NHTSA complaints note exterior door handles and/or door lock actuators failing, leading to doors that won’t open from outside (and sometimes inside) or won’t lock/unlock reliably. Failures are commonly tied to actuator motor wear, latch mechanism binding, or lin… Repairs typically run $180-$650. Severity: medium.

What is the 2021-2023 Kia K5 Steering Column/Intermediate Shaft Clunk or Knock (Low-Speed Turns)?

Owner reports and NHTSA complaints describe a clunk/knock felt through the steering wheel during low-speed turning or over small bumps. The condition is commonly associated with play in the intermediate steering shaft, column coupling, or related fasteners/bushings. Drivers repor… Repairs typically run $120-$650. Severity: medium.

What is the 2021-2023 Kia K5 Wireless Phone Charging Pad Overheating and Device Damage?

K5 models equipped with the optional wireless charging pad have generated NHTSA complaints and owner forum reports describing the pad running excessively hot during charging cycles, causing smartphones to display thermal warnings and in some cases warping or discoloring the charg… Severity: medium.

What is the 2021-2024 Kia K5 Turbocharger Oil Feed/Return Leak (1.6T) Causing Burning Oil Smell/Smoke?

Owner reports and NHTSA complaints on 1.6L turbo K5 models describe oil seepage/leaks around the turbocharger oil feed/return lines or related seals, sometimes producing a burning oil smell and light smoke after driving. Heat cycling can harden seals or loosen fittings, allowing… Repairs typically run $220-$1,200. Severity: medium.

What is the 2021-2024 Kia K5 8-Speed DCT Low-Speed Hesitation and Shudder?

Kia bulletin TRA100 documents clutch judder on some 2021 model year and later K5 GT vehicles equipped with the 2.5L T-GDI engine and 8-speed wet dual-clutch transmission. Kia defines the condition as body vibration, without steering-wheel shudder, during a controlled creep-drivin… Severity: medium.

What is the 2021-2025 Kia K5 ADAS Sensor Calibration Faults (Lane Keep, Forward Collision)?

The Advanced Driver Assistance Systems on the K5 — including Lane Keep Assist, Forward Collision Avoidance, and Blind Spot Monitoring — intermittently throw calibration faults and disable themselves. The forward-facing camera behind the windshield and radar sensor in the front bu… Repairs typically run $0-$1,500. Severity: medium.

What is the 2021-2025 Kia K5 Infotainment Screen Blackout and Random Reboots?

The K5 infotainment system — both the 8-inch and 10.25-inch displays — experiences random screen blackouts, freezes, and spontaneous reboots. The screen may go completely black while driving, losing access to navigation, backup camera, and climate controls. Some owners report the… Repairs typically run $0-$2,000. Severity: medium.

What is the 2021-2025 Kia K5 Theta II Engine Knock Sensor Issues and Knock-Related Concerns?

The 2.5L Theta II engine in certain K5 models has experienced knock sensor faults and engine knock concerns. The knock sensor may trigger false positives or fail to detect actual detonation, causing the ECU to either retard timing unnecessarily (reducing power) or fail to protect… Repairs typically run $0-$400. Severity: medium.

What is the 2021-2024 Kia K5 Paint Chipping and Clear Coat Peeling (Hood and Roof Panel)?

K5 owners across multiple model years have reported premature paint chipping on the hood and roof panels, with the clear coat peeling in flakes or bubbling in affected areas. This is documented in Kia owner forums and in some NHTSA complaints, particularly in darker colors such a… Repairs typically run $200-$1,800. Severity: low.