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Tesla · Known Issues

2017 Tesla Model S Problems: 14 Known Issues

2017 model year · NHTSA recalls, manufacturer TSBs, and owner forum reports · Updated September 2026

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Issue summary

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2017 Tesla Model S has 14 documented known issues, with 6 rated critical. The most serious are Model S / X Drive Unit "Milling" Noise / Failure ($0-$6,500 repair), Model S / X MCU1 eMMC Flash Memory Failure ($0-$2,500 repair), 12V Auxiliary Battery / DC-DC Converter Failure Cascade ($220-$1,800 repair), Drive Unit / Battery Coolant Leak (LDU Rotor Seal & Cooling Lines) ($300-$4,500 repair), Front Suspension Fore Link (Lower Control Link) Failure ($200-$900 repair) and High-Voltage Battery Pack Failure - BMS_u029 Fault ($2,000-$22,000 repair). Across all issues with published estimates, repair costs range from $20 to $22,000. DIY maintenance guides at au7o.io.

In This Article

  • Model S Electrical5
  • Model S Suspension2
  • Model S Drivetrain1
  • Model S Cooling1
  • Model S Exterior2
  • Model S Body/Panels2
  • Model S Brakes1
  • Recalls26
  • FAQ
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In This Article

  • Electrical5
  • Suspension2
  • Drivetrain1
  • Cooling1
  • Exterior2
  • Body/Panels2
  • Brakes1
  • Recalls26
  • FAQ
  • All 14 Known Issues

    Filter:
    ALL YEARS2024202320222021202020192018201720162015201420132012

    When Issues Typically Appear

    Model S / X Drive Unit "Milling" Noise / Failure
    30K-150K
    Model S / X MCU1 eMMC Flash Memory Failure
    30K-200K
    Model S / X Air Suspension Leveling / Nose-Droop
    80K-200K
    050K100K150K200K mi

    On the 2012-2018 Tesla Model S, the MCU1 (Tegra 3-based infotainment) used in 2012-2018 Model S and 2016-2018 Model X has a chronic eMMC flash memory wear-out issue — the 8GB eMMC accumulates write cycles from system logging until it fails, taking the rearview camera, defrost/defog controls, turn-signal lighting, and Autopilot configuration offline. NHTSA investigation led to recall 21V-035 (NHTSA Campaign 21V035000) covering 134,951 vehicles. Recall began March 29, 2021. Tesla's remedy is VCM daughterboard replacement with enhanced eMMC controller, free of charge.

    This issue also affects: Lucid Air, Polestar Polestar 2, Tesla Cybertruck

    Common Symptoms

    • blank screen
    • no infotainment
    • no climate control
    • autopilot unavailable
    • losing settings

    How to Fix

    Tesla covered the fix under recall 21V-035 — confirm via VIN at Tesla recall lookup. Out-of-recall: 3rd-party eMMC replacement (Gruber Motor, etc.) $400-$700; MCU2 retrofit from Tesla $2,000-$2,500 incl. labor.

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    Typical repair cost:$0 - $2,500

    Research This Issue

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    Manually Verified
    High Confidence

    On the 2012-2021 Tesla Model S, the low-voltage 12V lead-acid battery on early-to-mid Model S (concentrated in 2015-2018 build years) fails prematurely due to a poor original vendor cell plus constant vampire-load strain from always-on electronics. Roughly a third of Tesla NHTSA low-voltage complaints trace here. A weak 12V triggers a cascade of seemingly unrelated warnings, screen glitches, lock/unlock weirdness and 'car won't wake up.' In a subset of cars the real culprit is a failing DC-DC converter that stops properly charging the 12V, which owners misdiagnose as just a dead battery. A dead 12V can leave the car completely immobilized/locked.

    Common Symptoms

    • Multiple unrelated alerts appear at once
    • 'Car needs service - power reduced' warning
    • 12V battery service message
    • Vehicle will not wake / no response to key
    • Screen and lock/unlock glitches

    How to Fix

    Replace the 12V battery (OEM lead-acid ~$220-380 installed); many owners upgrade to a lithium or AGM unit for 3-4x service life. If warnings persist or return quickly after a fresh battery, diagnose the DC-DC converter output (the PCS/charger assembly) rather than replacing the battery again. Tesla covers the 12V under the 4yr/50k basic warranty.

    Typical repair cost:$220 - $1,800

    Research This Issue

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    Community Reported
    Medium ConfidenceVerifiedReviewed Jul 2026

    On the 2012-2018 Tesla Model S, the BMS_u029 alert ('maximum battery charge level reduced' / unable to charge to full) is a widely-reported code that has effectively killed a number of early Model S high-voltage packs. The Battery Management System detects a condition (module isolation drift, contactor concern, thermal imbalance, moisture intrusion or connector/harness corrosion) that makes it unsafe to charge the pack to normal capacity, so it caps charge and may progress to a no-charge/limp state. Related codes BMS_u018 and BMS_a029 appear in the same family. While a minority of cases are recoverable calibration/thermal faults, the fault frequently ends in an expensive pack or module repair on 85 kWh-era cars.

    Common Symptoms

    • 'Maximum battery charge level reduced' message
    • Sudden loss of range / charge cap
    • Car refuses to charge past a set percentage
    • Reduced power / vehicle may not restart
    • Alert appears after sitting unused for days

    How to Fix

    Get a professional HV diagnostic (SMT/Scan My Tesla data plus Tesla toolbox) to determine whether it is a recoverable isolation/thermal/contactor issue or genuine cell/module degradation. Some cars are fixed with a BMS reset, contactor service, or single-module replacement by an independent EV specialist; others need a remanufactured pack. Out-of-warranty full pack replacement is the worst case and the reason many owners pursue module-level rebuilds.

    Typical repair cost:$2,000 - $22,000

    Research This Issue

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    Community Reported
    Medium ConfidenceVerifiedReviewed Jul 2026

    On the 2012-2021 Tesla Model S, the charge port door fails to open on command, or the internal latch fails to lock/release the charge cable. The actuator motor stops engaging the latch mechanism, or the electrical command isn't fulfilled, so the door won't 'push-to-open,' won't close, or the connector locks/unlocks erratically. Cold weather makes the door stick or freeze shut. Because charging is the car's lifeblood, a failed charge-port latch can strand an owner unable to plug in or unable to remove a stuck cable.

    Common Symptoms

    • Charge port door will not open
    • Door won't close / stays ajar
    • Charge cable locked in or won't latch
    • 'Charge port latch not engaged' message
    • Port sticks or freezes in cold weather

    How to Fix

    Short term, use the manual release lever behind the left rear trunk trim to open the door/release the cable, and warm a frozen port. For persistent failures the charge port actuator/latch or the whole charge port assembly is replaced - a ~30-minute mobile-service job. Keep firmware current, as some latch behaviors are software-mediated.

    Typical repair cost:$150 - $700

    Research This Issue

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    Community Reported
    Medium ConfidenceVerifiedReviewed Jul 2026

    On the 2012-2018 Tesla Model S, the 17-inch center touchscreen develops a yellow band around its border as the display's optical bonding adhesive yellows when heat, humidity and oxygen reach it over time - very common on 2012-2017 cars, especially in warm climates. A related and more serious defect is LCD bubbling/gel leaking from the bottom of the screen as the adhesive fails. Both are cosmetic-to-functional display degradation, not an MCU logic-board failure (distinct from the eMMC issue). Tesla acknowledged the yellowing and built a UV-light remediation tool.

    Common Symptoms

    • Yellow band framing the edges of the touchscreen
    • Bubbles or blotches at the bottom of the display
    • Gel-like fluid leaking inside the screen
    • Discoloration worsens in hot weather

    How to Fix

    Tesla's UV-light fixture reverses the yellow border in ~2-3 hours at a service center (cannot be done by mobile service and can be a low/no-cost goodwill fix). The UV treatment is considered temporary and yellowing can return. For gel-bubbling/leaking screens the display is replaced (~$550+); owners often pair this with an MCU1-to-MCU2 upgrade.

    What you need to fix it

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

    • Tesla 2012-2020 Model S/X Infotainment Upgrade

      official installed hardware-upgrade branch when Tesla confirms display/MCU replacement or the owner elects the supported infotainment upgrade Fitment/availability: Model S produced 2012 through March 2018 or earlier, subject to Tesla acc…

      Tesla Shop

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    Typical repair cost:$0 - $1,500

    Research This Issue

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    Community Reported
    Medium ConfidenceVerifiedReviewed Jul 2026

    On the 2013-2017 Tesla Model S, the front lower 'fore link' (forward lower control link) can fracture or separate, most often at low speed while turning into a driveway or parking lot. NHTSA's ODI investigation (PE20-010) covering 2015-2017 Model S/X (74,918 vehicles) identified 426 fore-link failures; the agency closed the probe without a mandated recall but noted Tesla's 2017 service bulletin (limited to Jan-May 2016 builds) left ~75% of the failures uncovered and recommended Tesla widen coverage. A class action alleges a broader suspension defect. Failure at speed could cause loss of control.

    Common Symptoms

    • Clunk or knock from front suspension at low speed
    • Popping when turning into/out of a driveway
    • Wheel visibly out of alignment after an event
    • Uneven front tire wear
    • Loud bang followed by handling change

    How to Fix

    Inspect and replace the failed fore link (and inspect the lateral/aft link); many owners upgrade to reinforced aftermarket links with spherical or polyurethane bushings for durability. Have both sides inspected since failures cluster. Check whether the VIN is covered by Tesla's fore-link service bulletin for a goodwill replacement.

    What you need to fix it

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

    • Unplugged Performance Model S Front Lower Compliance Fore and Lateral Aft Arm Set

      upgraded complete-arm branch after inspection confirms failed front lower fore and/or lateral-aft components Fitment/availability: 2012-2026+ Tesla Model S according to manufacturer, including left/right fore and lateral/aft arm configur…

      Unplugged Performance

    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:$200 - $900

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    Community Reported
    Medium ConfidenceVerifiedReviewed Jul 2026

    On the 2012-2020 Tesla Model S all, model S and X with air suspension develop leveling-pump and air-strut failures — typically presenting as a nose-droop overnight (car settles unevenly) or "Air Suspension Needs Service" warning. Pump diaphragm wear is the most common single cause; corner air struts also leak. Common at 80,000-160,000 km.

    This issue also affects: Buick Enclave, Lincoln Continental, Lincoln Navigator

    Common Symptoms

    • nose droop
    • air suspension warning
    • uneven ride height
    • car settling overnight

    How to Fix

    Air pump replacement (refurbished) $300-$600 part + $200-$400 install. Single air strut $400-$800 part + install. Many owners switch to 3rd-party Arnott replacements. Severe cases need full system overhaul ($2,000-$4,000).

    What you need to fix it

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

    • Arnott P-3283 Air Suspension Compressor

      early-system compressor branch only after leak correction and compressor failure confirmation Fitment/availability: 2012-2015 Model S and 2016 Model S built through March 2016; verify OE 600640300A, build date and system before purchase …

      PartsGeek
    • Arnott P-3509 Air Suspension Compressor

      later-system compressor branch only after leak correction and compressor failure confirmation Fitment/availability: 2016 Model S built from April 2016; Arnott also catalogs later 2016-2021 Model S and specified Model X applications, but …

      CarParts.com
    • Arnott AS-4328 Front Air Strut

      early-RWD front-strut branch only when that strut is proven to leak Fitment/availability: 2012-2016 RWD Model S front position, including listed Performance Plus OE families; does not cover AWD or post-2016 systems and exact OE/build mus…

      EVANNEX

    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:$500 - $4,000

    Research This Issue

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    Manually Verified
    High Confidence

    On the 2012-2020 Tesla Model S, early Model S (and X) drive units develop a "milling" noise — a metallic whine that gradually grows louder, ultimately requiring drive-unit replacement. Tesla has replaced many DUs under warranty (often multiple times per car). Issue stems from gear-mesh quality and bearing tolerances; quieter post-2014 but still present. Front DU on dual-motor cars typically the first to fail.

    This issue also affects: Lucid Air, Polestar Polestar 2, Tesla Cybertruck

    Common Symptoms

    • whining noise
    • milling sound
    • humming
    • progressive louder over speed

    How to Fix

    Tesla warranty replacement is the standard fix when covered (8 yr / unlimited miles on drive unit historically). Out-of-warranty refurb DU from Tesla $2,500-$4,500; new $4,500-$6,500 incl. install. Have a Tesla service center document any whine while still under drivetrain warranty.

    Typical repair cost:$0 - $6,500

    Research This Issue

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    Manually Verified
    High Confidence

    On the 2012-2019 Tesla Model S, early Model S large drive units (LDU) have a known internal coolant leak where the rotor shaft seal fails and coolant migrates into the drive unit, and separately the battery/drive-unit cooling lines and fittings crack or seep with age. Leaks rarely show as a puddle; instead owners see intermittent low-coolant messages that clear overnight, cooling fans that keep running after charging, brief regen/power reductions on warm days, or the cabin heater blowing cold. Left unaddressed, coolant loss can overheat the drive unit or battery.

    Common Symptoms

    • Recurring 'coolant level low' messages
    • Cooling fans run after charging/parking
    • Brief regen or power reduction when warm
    • Heater blows cold air
    • Sweet coolant smell or slow coolant loss

    How to Fix

    Pressure-test the cooling system to locate the source. For a leaking LDU rotor seal the drive unit is resealed or replaced (reman units are common); for cracked coolant lines/fittings or a failed thermal valve/heat exchanger those components are replaced and the system is refilled and bled with the specified Tesla coolant. Address low-coolant warnings promptly to avoid thermal derate or pack damage.

    Typical repair cost:$300 - $4,500

    Research This Issue

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    Community Reported
    Medium ConfidenceVerifiedReviewed Jul 2026

    On the 2012-2020 Tesla Model S, the Model S's flush, auto-presenting exterior door handles are the single most-complained-about item on the car (the #1 issue in Consumer Reports' survey of ~1,300 owners). The small plastic 'paddle gear' inside the handle that transfers the pull to the latch cracks under material fatigue, and internal micro-switch wires break, so the handle stops presenting or fails to retract. The heavily-used driver's door often fails first, sometimes as early as ~20,000 miles, with the other three doors failing later. Owners can get locked out or unable to enter. Tesla revised the mechanism through Gen 1 -> Gen 2.1 -> Gen 3, but the earlier design remains widespread on used cars.

    Common Symptoms

    • Door handle does not present/extend when approached
    • Handle stays out and will not retract
    • Intermittent operation, worse in cold
    • Clicking or no response when pressing handle
    • Locked out of the vehicle

    How to Fix

    Replace the failed handle assembly with a later-generation unit, or install a paddle-gear/micro-switch rebuild kit (billet or upgraded plastic gear) which addresses the root-cause wear part at far lower cost than a full assembly. Retrofitting the Gen 3.0 handle per the Tesla service bulletin is the most durable fix. If only the microswitch/wire has broken the handle can often be repaired without a new assembly.

    What you need to fix it

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

    • EVANNEX Tesla Model S Door Handle Repair Kit

      paddle-gear and microswitch-harness rebuild branch for a diagnosed early-generation handle Fitment/availability: early Model S Gen 1/2 presenting handle using OE-reference 1016009-00-E / 1042845-00-B components; verify installed handle g…

      EVANNEX

    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 - $600

    Research This Issue

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    Community Reported
    Medium ConfidenceVerifiedReviewed Jul 2026

    On the 2012-2020 Tesla Model S, the window regulator on Model S doors fails because of a weak plastic ferrule in the regulator assembly that cracks, letting the glass come off its track or float free in the door. Owners report grinding/crunching or cracking noises raising and lowering the glass, glass that sticks out past the chrome trim (which also blocks the frameless-door auto-drop, risking a closed door catching the glass), or a window that drops into the door and won't come up. It affects front and rear doors across most model years.

    Common Symptoms

    • Grinding/cracking noise when moving the window
    • Glass off-track or sticking past the trim
    • Window falls into the door and won't raise
    • Window moves slowly or stops mid-travel
    • Auto-drop on frameless door not working

    How to Fix

    Replace the window regulator assembly (OEM), or install an upgraded billet-aluminum ferrule to cure the root-cause weak point at low cost. Check that the regulator/motor mounting bolts are torqued, since loose bolts accompany some failures. Re-calibrate the window after service.

    What you need to fix it

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

    • Gruber Motors Billet Aluminum Window Regulator Ferrule

      root-cause ferrule-only repair branch Fitment/availability: Tesla Model S cable regulator whose plastic tensioner bushing is confirmed broken while cable, rail, pulleys and motor remain serviceable Fitment/availability: Add to cart live …

      Gruber Motors
    • Gruber Motors Tesla Model S Power Window Regulator Assembly

      complete regulator branch when damage extends beyond the ferrule Fitment/availability: selected Model S driver/passenger and front/rear door; buyer must choose the exact failed position and confirm assembly/service option Fitment/availab…

      Gruber Motors

    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:$20 - $450

    Research This Issue

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    Community Reported
    Medium ConfidenceVerifiedReviewed Jul 2026

    On the 2012-2018 Tesla Model S, model S cars fitted with the optional panoramic (opening) glass roof are prone to water leaking into the cabin during heavy rain. Root causes include an improperly seated rear rubber seal, the early 2014-design seal channel that has an opening at the rear (so when parked nose-down on a hill the drain channel fills and overflows back inside), and pano-roof spacers pushing out. A manufacturing fault where the roof damaged its own seals on open/close drove a Tesla recall/seal service. Water intrusion can wet headliner, pillars and floor and, in worst cases, reach electronics. Tesla discontinued the panoramic option in 2018 in favor of the fixed glass roof.

    Common Symptoms

    • Water dripping from headliner or A/B pillars in rain
    • Damp carpet or footwells after storms
    • Wind noise from roof at speed
    • Musty smell / fogging interior
    • Water pooling when parked on an incline

    How to Fix

    Have a Tesla service center re-adjust the roof closure pressure/settings and reseat or replace the rubber seal; clean and lubricate the roof mechanism per the service procedure. Ensure drain channels are clear. Cars with recurring leaks may need the updated seal or spacer correction. The fixed glass roof (2018+) eliminates the problem.

    Typical repair cost:$0 - $900

    Research This Issue

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    Community Reported
    Medium ConfidenceVerifiedReviewed Jul 2026

    On the 2012-2020 Tesla Model S, the front trunk ('frunk') fails to open on command because the electric hood latch actuator fails or the release cables corrode/seize or the latch goes misaligned. Owners hear the actuator working but the hood won't pop, or the dash reports 'front trunk / hood latch position unknown.' Conversely a frunk that doesn't latch fully is a safety concern - Tesla has run recalls inspecting the frunk secondary/hood latch on some cars. Loss of frunk access blocks the emergency 12V jump/manual-release points on some models.

    Common Symptoms

    • Frunk won't open on command
    • 'Front trunk/hood latch position unknown' alert
    • Actuator noise but hood stays shut
    • Frunk won't stay latched / pops at speed
    • Grinding or no movement from the latch

    How to Fix

    Free seized cables by applying lithium grease to the actuator cable and cycling it by hand; realign or reposition the secondary latch per the service procedure. Replace a failed latch actuator if the mechanism no longer engages. For 'won't latch' cases confirm whether the VIN falls under a frunk/secondary-latch recall for a free inspection and re-alignment.

    Typical repair cost:$0 - $400

    Research This Issue

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    Community Reported
    Medium ConfidenceVerifiedReviewed Jul 2026

    On the 2013-2021 Tesla Model S, the rear integrated electronic parking brake (EPB) calipers seize or the caliper actuator motor fails, throwing 'EPB_w053 - Parking brake did not release' or 'EPB_w052 - Parking brake functions degraded.' The caliper shaft can seize (often from moisture/corrosion in cars driven little or in salt climates) or the small electric motor that drives the park-brake screw fails, leaving the brake stuck applied or unable to hold. Because the mechanism is integrated into the rear caliper, Tesla typically replaces the entire caliper - and frequently both rear sides - which drives significant cost.

    Common Symptoms

    • 'Parking brake did not release' warning
    • 'Parking brake functions degraded' warning
    • Grinding or dragging from a rear wheel
    • Car will not move / rear wheel locked
    • Parking brake will not hold on an incline

    How to Fix

    Use the EPB release tool/connector to fully release a stuck caliper; if the shaft is seized or the motor is damaged, the park-brake caliper (or the caliper's park-brake motor) is replaced and the system re-calibrated. Clean-and-lubricate service can prevent recurrence. Independent shops sometimes replace just the actuator motor to avoid a full dual-caliper job.

    Typical repair cost:$350 - $1,600

    Research This Issue

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    Community Reported
    Medium ConfidenceVerifiedReviewed Jul 2026
    NHTSA Recalls26 recalls

    ELECTRICAL SYSTEM:ADAS:AUTONOMOUS/SELF DRIVING:SOFTWARE

    Tesla, Inc. (Tesla) is recalling certain 2016-2022 Model S and Model X, 2017-2022 Model 3, and 2020-2022 Model Y vehicles. The "rolling stop" functionality available as part of the Full Self-Driving (Beta) software may allow the vehicle to travel through an all-way stop intersection without first coming to a stop.

    Campaign #22V03700027/01/2022

    LATCHES/LOCKS/LINKAGES:HOOD:LATCH

    Tesla, Inc. (Tesla) is recalling certain 2014-2021 Model S vehicles. The front trunk latch assembly may be misaligned, preventing the secondary hood latch from engaging. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 113, "Hood Latch System."

    Campaign #21V00B00021/12/2021

    FORWARD COLLISION AVOIDANCE: SENSING SYSTEM: CAMERA

    Tesla, Inc. (Tesla) is recalling certain 2017-2021 Model S, Model 3, Model X, and 2020-2021 Model Y vehicles operating software version 2021.36.5.2. A communication error may cause false forward-collision warning (FCW) or unexpected activation of the automatic emergency brake (AEB) system.

    Campaign #21V84600029/10/2021

    ELECTRICAL SYSTEM:ADAS:AUTONOMOUS/SELF DRIVING:SOFTWARE

    Tesla, Inc. (Tesla) is recalling 2012-2023 Model S, 2016-2023 Model X, 2017-2023 Model 3, and 2020-2023 Model Y vehicles equipped with all versions of Autosteer leading up to the version(s) that contains the recall remedy. In certain circumstances when Autosteer is engaged, the prominence and scope of the feature's controls may not be sufficient to prevent driver misuse of the SAE Level 2 advanced driver-assistance feature.

    Campaign #23V83800012/12/2023

    ELECTRICAL SYSTEM:SOFTWARE

    Tesla, Inc. (Tesla) is recalling certain 2020-2022 Model Y, Model X, Model S, and 2017-2022 Model 3 vehicles. The Boombox function allows sounds to be played through an external speaker while the vehicle is in motion, which may obscure the Pedestrian Warning System (PWS) sounds. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 141, "Minimum Sound Requirements for Hybrid and Electric Vehicles."

    Campaign #22V23500012/04/2022

    + 21 more recalls. Check all on NHTSA.gov

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

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    Frequently Asked Questions

    What are the most common Tesla Model S problems?

    According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2017 Tesla Model S has 14 documented issues. The most frequently reported are: Model S / X Drive Unit "Milling" Noise / Failure, Model S / X MCU1 eMMC Flash Memory Failure, 12V Auxiliary Battery / DC-DC Converter Failure Cascade. Of these, 6 are rated critical and should be addressed promptly.

    Is the Tesla Model S reliable?

    The 2017 Tesla Model S has 14 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. 6 issues are rated critical: Model S / X Drive Unit "Milling" Noise / Failure and Model S / X MCU1 eMMC Flash Memory Failure and 12V Auxiliary Battery / DC-DC Converter Failure Cascade and Drive Unit / Battery Coolant Leak (LDU Rotor Seal & Cooling Lines) and Front Suspension Fore Link (Lower Control Link) Failure and High-Voltage Battery Pack Failure - BMS_u029 Fault. 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 Tesla Model S problems?

    Repair costs for known Tesla Model S issues range from $0 to $22,000, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, Model S / X Drive Unit "Milling" Noise / Failure, typically costs $0-$6,500 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

    What is the 2012-2020 Tesla Model S Model S / X Drive Unit "Milling" Noise / Failure?

    Early Model S (and X) drive units develop a "milling" noise — a metallic whine that gradually grows louder, ultimately requiring drive-unit replacement. Tesla has replaced many DUs under warranty (often multiple times per car). Issue stems from gear-mesh quality and bearing toler… Repairs typically run $0-$6,500. Severity: high.

    What is the 2012-2018 Tesla Model S Model S / X MCU1 eMMC Flash Memory Failure?

    The MCU1 (Tegra 3-based infotainment) used in 2012-2018 Model S and 2016-2018 Model X has a chronic eMMC flash memory wear-out issue — the 8GB eMMC accumulates write cycles from system logging until it fails, taking the rearview camera, defrost/defog controls, turn-signal lightin… Repairs typically run $0-$2,500. Severity: high.

    What is the 2012-2021 Tesla Model S 12V Auxiliary Battery / DC-DC Converter Failure Cascade?

    The low-voltage 12V lead-acid battery on early-to-mid Model S (concentrated in 2015-2018 build years) fails prematurely due to a poor original vendor cell plus constant vampire-load strain from always-on electronics. Roughly a third of Tesla NHTSA low-voltage complaints trace her… Repairs typically run $220-$1,800. Severity: high.

    What is the 2012-2019 Tesla Model S Drive Unit / Battery Coolant Leak (LDU Rotor Seal & Cooling Lines)?

    Early Model S large drive units (LDU) have a known internal coolant leak where the rotor shaft seal fails and coolant migrates into the drive unit, and separately the battery/drive-unit cooling lines and fittings crack or seep with age. Leaks rarely show as a puddle; instead owne… Repairs typically run $300-$4,500. Severity: high.

    What is the 2013-2017 Tesla Model S Front Suspension Fore Link (Lower Control Link) Failure?

    The front lower 'fore link' (forward lower control link) can fracture or separate, most often at low speed while turning into a driveway or parking lot. NHTSA's ODI investigation (PE20-010) covering 2015-2017 Model S/X (74,918 vehicles) identified 426 fore-link failures; the agen… Repairs typically run $200-$900. Severity: high.

    What is the 2012-2018 Tesla Model S High-Voltage Battery Pack Failure - BMS_u029 Fault?

    The BMS_u029 alert ('maximum battery charge level reduced' / unable to charge to full) is a widely-reported code that has effectively killed a number of early Model S high-voltage packs. The Battery Management System detects a condition (module isolation drift, contactor concern,… Repairs typically run $2,000-$22,000. Severity: high.

    What is the 2012-2021 Tesla Model S Charge Port Door / Latch Actuator Failure?

    The charge port door fails to open on command, or the internal latch fails to lock/release the charge cable. The actuator motor stops engaging the latch mechanism, or the electrical command isn't fulfilled, so the door won't 'push-to-open,' won't close, or the connector locks/unl… Repairs typically run $150-$700. Severity: medium.

    What is the 2012-2020 Tesla Model S Retractable Door Handle Failure (Paddle Gear / Actuator Wear)?

    The Model S's flush, auto-presenting exterior door handles are the single most-complained-about item on the car (the #1 issue in Consumer Reports' survey of ~1,300 owners). The small plastic 'paddle gear' inside the handle that transfers the pull to the latch cracks under materia… Repairs typically run $120-$600. Severity: medium.

    What is the 2012-2018 Tesla Model S Panoramic Sunroof Water Leak?

    Model S cars fitted with the optional panoramic (opening) glass roof are prone to water leaking into the cabin during heavy rain. Root causes include an improperly seated rear rubber seal, the early 2014-design seal channel that has an opening at the rear (so when parked nose-dow… Repairs typically run $0-$900. Severity: medium.

    What is the 2012-2020 Tesla Model S Model S / X Air Suspension Leveling / Nose-Droop?

    Model S and X with air suspension develop leveling-pump and air-strut failures — typically presenting as a nose-droop overnight (car settles unevenly) or "Air Suspension Needs Service" warning. Pump diaphragm wear is the most common single cause; corner air struts also leak. Comm… Repairs typically run $500-$4,000. Severity: medium.

    What is the 2013-2021 Tesla Model S Electronic Parking Brake Caliper Seizure (EPB Motor Failure)?

    The rear integrated electronic parking brake (EPB) calipers seize or the caliper actuator motor fails, throwing 'EPB_w053 - Parking brake did not release' or 'EPB_w052 - Parking brake functions degraded.' The caliper shaft can seize (often from moisture/corrosion in cars driven l… Repairs typically run $350-$1,600. Severity: medium.

    What is the 2012-2018 Tesla Model S Center Touchscreen Yellow Border & LCD Delamination/Bubbling?

    The 17-inch center touchscreen develops a yellow band around its border as the display's optical bonding adhesive yellows when heat, humidity and oxygen reach it over time - very common on 2012-2017 cars, especially in warm climates. A related and more serious defect is LCD bubbl… Repairs typically run $0-$1,500. Severity: low.

    What is the 2012-2020 Tesla Model S Frunk (Front Trunk) Hood Latch Actuator / Cable Failure?

    The front trunk ('frunk') fails to open on command because the electric hood latch actuator fails or the release cables corrode/seize or the latch goes misaligned. Owners hear the actuator working but the hood won't pop, or the dash reports 'front trunk / hood latch position unkn… Repairs typically run $0-$400. Severity: low.

    What is the 2012-2020 Tesla Model S Power Window Regulator Failure (Plastic Ferrule Design Flaw)?

    The window regulator on Model S doors fails because of a weak plastic ferrule in the regulator assembly that cracks, letting the glass come off its track or float free in the door. Owners report grinding/crunching or cracking noises raising and lowering the glass, glass that stic… Repairs typically run $20-$450. Severity: low.

    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 compiled from NHTSA recalls, manufacturer TSBs, automotive forums, and AI-assisted research. No aggregated owner-report counts available for this vehicle yet.