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Porsche · Known Issues

2019 Porsche 718 Cayman Problems: 11 Known Issues

2019 model year · 4,850+ owner reports · Updated September 2026

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Issue summary

According to Au7o's analysis of 4,850+ owner reports, the 2019 Porsche 718 Cayman has 11 documented known issues, with 4 rated critical. The most serious are PDK Mechatronic Unit Issues ($2,500-$6,000 repair), 2.0L Turbo Wastegate Actuator Seizure Causing Boost Collapse / Limp Mode ($2,500-$6,000 repair), Recall 19V113000: Luggage Compartment Crossmember Can Detach in a Crash, Causing a Fuel Leak and Water Pump (Coolant Pump) Bearing/Seal Failure with Labor-Intensive Exhaust Removal ($1,360-$3,610 repair). The most commonly reported issue is Turbo Wastegate Rattle at Idle with 3,000 owner reports. Across all issues with published estimates, repair costs range from $150 to $6,000. DIY maintenance guides at au7o.io.

In This Article

  • 718 Cayman Engine4
  • 718 Cayman Transmission2
  • 718 Cayman Cooling2
  • 718 Cayman Fuel System1
  • 718 Cayman Exterior1
  • 718 Cayman Electrical1
  • FAQ
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In This Article

  • Engine4
  • Transmission2
  • Cooling2
  • Fuel System1
  • Exterior1
  • Electrical1
  • FAQ

All 11 Known Issues

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Other Porsche Models

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Frequently Asked Questions

What are the most common Porsche 718 Cayman problems?

According to Au7o's analysis of 4,850+ owner reports, the 2019 Porsche 718 Cayman has 11 documented issues. The most frequently reported are: PDK Mechatronic Unit Issues, 2.0L Turbo Wastegate Actuator Seizure Causing Boost Collapse / Limp Mode, Recall 19V113000: Luggage Compartment Crossmember Can Detach in a Crash, Causing a Fuel Leak. Of these, 4 are rated critical and should be addressed promptly.

Is the Porsche 718 Cayman reliable?

The 2019 Porsche 718 Cayman has 11 known issues documented across 4,850+ owner reports. 4 issues are rated critical: PDK Mechatronic Unit Issues and 2.0L Turbo Wastegate Actuator Seizure Causing Boost Collapse / Limp Mode and Recall 19V113000: Luggage Compartment Crossmember Can Detach in a Crash, Causing a Fuel Leak and Water Pump (Coolant Pump) Bearing/Seal Failure with Labor-Intensive Exhaust Removal. 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 Porsche 718 Cayman problems?

Repair costs for known Porsche 718 Cayman issues range from $150 to $6,000, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, PDK Mechatronic Unit Issues, typically costs $2,500-$6,000 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What is the 2017-2023 Porsche 718 Cayman PDK Mechatronic Unit Issues?

The 718 Cayman PDK transmission shares the same mechatronic valve body issues as the 718 Boxster. Solenoid wear causes harsh shifts, delayed engagement, and transmission fault codes. Regular PDK fluid changes are the best prevention. Repairs typically run $2,500-$6,000. Severity: high.

What is the 2017-2025 Porsche 718 Cayman 2.0L Turbo Wastegate Actuator Seizure Causing Boost Collapse / Limp Mode?

On the base 2.0L 718 the single turbocharger and its electronic wastegate actuator are mounted low under the belly pan, exposing the actuator to road water, salt, and debris. Over time the actuator rod corrodes and seizes, so boost builds momentarily (e.g., ~15 psi) then collapse… Repairs typically run $2,500-$6,000. 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 4,850+ owner reports, NHTSA recalls, TSBs, and automotive forums.

Filter:
ALL YEARS202520242023202220212020201920182017

When Issues Typically Appear

Turbo Wastegate Rattle at Idle
1K-50K
Direct Injection Intake Valve Carbon Buildup
25K-60K
PDK Mechatronic Unit Issues
40K-90K
025K50K75K100K mi

On the 2017-2025 Porsche 718 Cayman 2.0L turbo flat-four (base 718), on the base 2.0L 718 the single turbocharger and its electronic wastegate actuator are mounted low under the belly pan, exposing the actuator to road water, salt, and debris. Over time the actuator rod corrodes and seizes, so boost builds momentarily (e.g., ~15 psi) then collapses, or never exceeds ~5 psi. The result is sudden loss of power, juddery delivery under hard acceleration, and sometimes a PSM/engine warning; restarting the engine often temporarily restores boost. The 2.5L is less affected because its turbo sits higher in the engine bay. Porsche's official remedy for a failed actuator is replacement of the complete turbocharger; later parts have improved weather protection. This is distinct from the audible idle wastegate rattle in that it produces actual boost loss and turbo replacement.

This issue also affects: Audi A1, Audi A3, Audi A6

Common Symptoms

  • Sudden loss of boost / power
  • Boost builds then drops to a few psi
  • Juddery power under hard acceleration
  • Engine/PSM warning light
  • Power restored after engine restart

How to Fix

Diagnose with boost-pressure logging; freeing/greasing the actuator arm can be a temporary measure, but Porsche's fix is to replace the turbocharger assembly (under warranty/extended warranty where applicable). Use the updated turbo with improved actuator protection and inspect/seal the underbody exposure point.

Typical repair cost:$2,500 - $6,000

Research This Issue

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Community Reported
High ConfidenceVerifiedReviewed Jun 2026
Community reported
1,100 owners

On the 2017-2025 Porsche 718 Cayman, the 718 Cayman turbo flat-four and naturally aspirated flat-six engines use direct injection, which does not wash the intake valves with fuel. Carbon deposits accumulate on the intake valves over time, restricting airflow and causing rough idle, misfires, and power loss. The turbo engines are more prone due to higher intake temperatures.

This issue also affects: Audi S8, Audi A4, Audi A1

Common Symptoms

  • Rough idle worsening over time
  • Hesitation on acceleration
  • Misfires at low RPM
  • Reduced fuel economy
  • Check engine light with misfire codes

How to Fix

Walnut blasting of intake valves every 40,000-50,000 miles. Install an oil catch can to reduce the rate of carbon buildup. Chemical intake cleaning can help in mild cases but walnut blasting is the definitive solution.

Owner tips & cautions

  • TipBudget for walnut blasting every 40,000 miles as routine maintenance on any DFI Porsche engine — it is not optional, it is required maintenance.
Typical repair cost:$700 - $1,500

Research This Issue

Based on 1,100 owner reports

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Community Reported
High Confidence1,100 owner reportsLast reported by owners Feb 2026Reviewed Mar 2026

On the 2017-2025 Porsche 718 Cayman, the air-oil separator in the crankcase ventilation system can fail, with the internal diaphragm tearing. This lets crankcase vacuum spike and draws engine oil into the intake, producing heavy blue/white exhaust smoke (often worst on cold startup or under load), oil residue in the intake tract, possible whistling/hissing from the engine bay, and lean/rich fuel-trim faults. Failures are documented on 718 flat-four cars, in some cases at very low mileage. Driving with a failed AOS risks oil consumption and, in severe cases, hydrolock/engine damage.

This issue also affects: Audi S4, Audi S8

Common Symptoms

  • Blue/white exhaust smoke, worst on startup or under load
  • Oil residue in intake
  • Whistling/hissing from engine bay
  • Rough idle / fuel-trim faults
  • Elevated oil consumption
  • Check engine light

How to Fix

Replace the AOS (some owners fit upgraded units, especially for track use); inspect the intake for oil contamination and clear any stored fuel-trim codes. Address promptly to avoid runaway oil consumption.

What you need to fix it

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

  • Genuine Porsche 0PC115099B complete oil separator

    Confirm exact submodel/VIN for 2025 and order one 9A210747300 seal separately.

    PartsGeek
  • Genuine Porsche 9A210747300 oil-separator seal

    2017-2024 Porsche 718 Cayman 2.0L and 2.5L turbo applications cataloged by the retailer; 9A210747300/9A2-107-473-00. It is a companion, not a stand-alone AOS repair.

    RM European
  • Genuine Porsche 9A210790400 AOS diaphragm

    Confirm engine/VIN and do not use for a damaged separator housing or unresolved crankcase fault.

    Sierra Madre Collection

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:$400 - $1,200

Research This Issue

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Community Reported
High ConfidenceVerifiedReviewed Jun 2026
Community reported
3,000 owners

On the 2017-2025 Porsche 718 Cayman, the 718 Cayman shares the same turbo flat-four engine as the 718 Boxster and exhibits identical wastegate rattle at idle. The metallic buzzing sound is caused by play in the wastegate actuator arm and is the single most common complaint on 718 forums.

Common Symptoms

  • Metallic buzzing or tapping at idle
  • Rattle disappears under load
  • Sound from rear of vehicle
  • More noticeable when warm
  • No effect on performance

How to Fix

Replace the wastegate actuator with updated Porsche part. The fix is identical to the 718 Boxster — dealer warranty coverage is available for many VINs.

Owner tips & cautions

  • TipThis is a known issue covered under Porsche warranty. Document with video and have your dealer submit a warranty claim for the updated wastegate actuator.

Research This Issue

Based on 3,000 owner reports

GoogleRedditYouTubeNHTSA
Community Reported
High Confidence3,000 owner reportsLast reported by owners Mar 2026Reviewed Mar 2026
Community reported
750 owners

On the 2017-2023 Porsche 718 Cayman, the 718 Cayman PDK transmission shares the same mechatronic valve body issues as the 718 Boxster. Solenoid wear causes harsh shifts, delayed engagement, and transmission fault codes. Regular PDK fluid changes are the best prevention.

This issue also affects: Audi A4 Avant, Audi A4, Audi A8

Common Symptoms

  • Harsh shifting
  • Delayed gear engagement
  • Transmission fault light
  • Shudder at low speeds
  • Occasional gear refusal

How to Fix

Replace or rebuild the PDK mechatronic unit. Maintain strict 40,000-mile PDK fluid change intervals. The repair is identical to the 718 Boxster procedure.

Owner tips & cautions

  • TipPDK fluid change at 40,000 miles is the single most important maintenance item for long-term PDK reliability. Do not skip this service.
Typical repair cost:$2,500 - $6,000

Research This Issue

Based on 750 owner reports

GoogleRedditYouTubeNHTSA
Community Reported
Medium Confidence750 owner reportsLast reported by owners Feb 2026Reviewed Mar 2026

On the 2017-2025 Porsche 718 Cayman, owners of 6-speed manual 718 Caymans (including base, S, and GTS) report an intermittent grind or crunch when shifting from 1st to 2nd, most often on quicker shifts above ~4,000 rpm but also occasionally during gentle low-rpm shifts. Reported contributors include air in the hydraulic clutch line / poor clutch fluid condition, an improperly mounted or out-of-adjustment slave cylinder, and shift technique that doesn't let revs settle. In persistent cases owners have escalated to Porsche; most are managed without a gearbox rebuild, though a minority of 2.5 cars have reported needing transmission work for 1-2 grind.

Common Symptoms

  • Grind/crunch shifting 1st to 2nd
  • Worse on fast upshifts above ~4000 rpm
  • Intermittent, hard to reproduce

How to Fix

Bleed/replace the clutch fluid and verify the slave cylinder is correctly mounted and adjusted; confirm correct gearbox oil level/spec. Adjust shift technique (full clutch travel, let revs drop). If grinding persists after hydraulic service, have the dealer inspect the 1-2 synchros under warranty.

Typical repair cost:$150 - $600

Research This Issue

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Community Reported
High ConfidenceVerifiedReviewed Jun 2026

On the 2017-2025 Porsche 718 Cayman, the engine-driven coolant pump on the 982-generation 718 four-cylinder turbo engines (2.0L and 2.5L) is prone to early bearing wear, plastic impeller degradation, and seal failure, sometimes as early as 20,000-40,000 km. A failing pump causes coolant loss and overheating risk, and because the pump is buried low in the mid-engine bay behind the exhaust, the catalytic converter / rear exhaust assembly must be partially removed to access it, driving labor far above a typical water pump job. A leaking pump can also damage the cooling system changeover (switchover) valve. Many owners and independent shops recommend proactive replacement around 30,000-50,000 miles / 50,000 km.

Common Symptoms

  • Knocking, whining or squealing from the pump area
  • Coolant smell
  • Visible coolant drips/leak
  • Erratic or rising coolant temperature
  • Low coolant warning

How to Fix

Replace the coolant pump (often together with thermostat, gasket, pulley, and a coolant flush) once seepage, noise, or coolant loss appears; many owners replace it proactively before the warranty expires given the high labor content. Pressure-test the system afterward and inspect the changeover valve.

What you need to fix it

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

  • Genuine Porsche 9A210605003 main engine water pump

    Confirm exact VIN for 2025; not the auxiliary electric pump.

    ECS Tuning

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:$1,360 - $3,610

Research This Issue

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Community Reported
High ConfidenceVerifiedReviewed Jun 2026

On the 2017-2025 Porsche 718 Cayman, the plastic coolant expansion/overflow reservoir on the 982 718 can crack along the seam where its upper and lower halves are joined, causing slow coolant loss that often only appears when the system is hot and pressurized. Forum discussion and a 982 service bulletin tie a higher incidence to cars built roughly March-August 2018; an integrated coolant-level sensor can also fail and trigger a 'refill coolant / stop driving' warning even when actual coolant temperature is normal. Because of where the reservoir is packaged, replacement on the 982 typically requires dropping the engine/transmission assembly, making an otherwise cheap part very expensive to address.

Common Symptoms

  • Slow coolant loss, worse when hot
  • Coolant smell
  • 'Refill coolant / stop driving' warning with normal temperature
  • Damp residue around the reservoir seam

How to Fix

Replace the coolant reservoir (and the level sensor if faulty) with the updated part; confirm whether the symptom is a true crack/leak versus a faulty level sensor before authorizing the engine-out labor. Pressure-test the system after repair.

What you need to fix it

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

  • Genuine Porsche 982121407C coolant expansion tank

    Confirm VIN and do not order for a cap, hose, filler-neck or wiring fault.

    FCP Euro

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:$1,500 - $4,000

Research This Issue

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Community Reported
High ConfidenceVerifiedReviewed Jun 2026

On the 2017-2019 Porsche 718 Cayman, porsche Cars North America issued NHTSA recall 19V113000 covering 2017-2019 718 Cayman and 718 Cayman S models, along with 2018-2019 718 Cayman GTS versions. On affected cars, a crossmember can detach from the luggage compartment bracket in the event of a crash. If that happens, fuel can leak. NHTSA's consequence statement is blunt: a fuel leak in the presence of an ignition source increases the risk of fire. Because the defect only shows itself during a crash, there is nothing an owner will notice in normal driving on a 718 Cayman that still has this campaign open. The 14,388-vehicle count is campaign-wide across every model Porsche included, not a figure for the 718 Cayman by itself. Porsche's internal reference for the campaign is AKA3, and the recall began April 19, 2019.

Common Symptoms

  • No symptom during normal driving - the crossmember only detaches in a crash
  • Fuel leak after a collision

How to Fix

The repair is free at any Porsche dealer. The dealer secures the crossmember with additional rivets so it stays attached to the luggage compartment bracket in a crash. Owners were notified starting April 19, 2019, but a used 718 Cayman may still have the work outstanding, so enter your VIN at nhtsa.gov/recalls to check whether campaign 19V113000 (Porsche code AKA3) is still open on your car. Porsche customer service can be reached at 1-800-767-7243.

Research This Issue

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Community Reported
High ConfidenceVerifiedReviewed Aug 2026

On the 2017-2025 Porsche 718 Cayman, moisture intrusion in the lighting units is a recurring weak spot on the 718. Owners report water droplets, pooling, or persistent fogging inside PDLS/LED headlights and in the taillights, even on low-mileage, garaged cars, attributed to imperfect housing seals. Separately, a defect in the headlight lens UV coating/material can cause fine cracks or a peeling/hazy film on the inside of the lens. Light venting mist that clears with the lights on is considered normal; standing water, pooling, or persistent heavy fogging indicates a failed seal and is sometimes replaced under warranty.

Common Symptoms

  • Fogging or water droplets inside headlights
  • Pooling water in headlight or taillight housing
  • Internal lens cracking/peeling/haze
  • Condensation in taillights

How to Fix

Distinguish normal venting mist from true water ingress; for pooling water, persistent fogging, or internal lens cracking/peeling, replace the affected headlight or taillight assembly (warranty where applicable). Verify housing seals and venting are intact on replacement.

Typical repair cost:$300 - $2,000

Research This Issue

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Community Reported
High ConfidenceVerifiedReviewed Jun 2026

On the 2017-2021 Porsche 718 Cayman 2.5L turbo flat-four (Cayman S), when the factory-fitted spark plugs are replaced for the first time (typically the ~4-year / ~40,000-mile service), owners and OPCs frequently find the ignition coil mounting bolts seized in place. The bolt must be drilled out and the coil pack replaced, turning routine plug maintenance into a multi-day, specialist job. Documented on 718 Cayman S cars; the repair has been covered under warranty after owner advocacy in reported cases.

Common Symptoms

  • Seized/sheared coil pack bolt during spark plug service
  • Inability to remove coil for plug access
  • Extended shop time at first major service

How to Fix

On the first plug change, anticipate seized coil bolts; if a bolt shears or seizes, drill it out and replace the affected coil pack. Use anti-seize on reinstallation. Owners within warranty should pursue coverage as a known defect.

What you need to fix it

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

  • Genuine Porsche 99907310301 ignition-coil retainer screw

    Porsche 99907310301 M6 ignition-coil retainer cataloged for the 718 2.0L/2.5L ignition system; this issue approves it for 2017-2021 Cayman S 2.5L after confirming the removed screw number.

    eBay / Loeber Motors
  • Eldor OEM 0PB905093F ignition coil

    2017-2024 Porsche 718 Cayman S 2.5L H4 per the direct listing; 0PB905093F, quantity one per failed position and four used per engine. Do not replace a sound coil solely because its screw seized.

    RM European

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 - $700

Research This Issue

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Community Reported
Medium ConfidenceVerifiedReviewed Jun 2026
get a full repair guide

What is the 2017-2019 Porsche 718 Cayman Recall 19V113000: Luggage Compartment Crossmember Can Detach in a Crash, Causing a Fuel Leak?

Porsche Cars North America issued NHTSA recall 19V113000 covering 2017-2019 718 Cayman and 718 Cayman S models, along with 2018-2019 718 Cayman GTS versions. On affected cars, a crossmember can detach from the luggage compartment bracket in the event of a crash. If that happens,… Severity: high.

What is the 2017-2025 Porsche 718 Cayman Water Pump (Coolant Pump) Bearing/Seal Failure with Labor-Intensive Exhaust Removal?

The engine-driven coolant pump on the 982-generation 718 four-cylinder turbo engines (2.0L and 2.5L) is prone to early bearing wear, plastic impeller degradation, and seal failure, sometimes as early as 20,000-40,000 km. A failing pump causes coolant loss and overheating risk, an… Repairs typically run $1,360-$3,610. Severity: high.

What is the 2017-2025 Porsche 718 Cayman Direct Injection Intake Valve Carbon Buildup?

The 718 Cayman turbo flat-four and naturally aspirated flat-six engines use direct injection, which does not wash the intake valves with fuel. Carbon deposits accumulate on the intake valves over time, restricting airflow and causing rough idle, misfires, and power loss. The turb… Repairs typically run $700-$1,500. Severity: medium.

What is the 2017-2025 Porsche 718 Cayman Manual Transmission 1st-to-2nd Gear Grind/Crunch?

Owners of 6-speed manual 718 Caymans (including base, S, and GTS) report an intermittent grind or crunch when shifting from 1st to 2nd, most often on quicker shifts above ~4,000 rpm but also occasionally during gentle low-rpm shifts. Reported contributors include air in the hydra… Repairs typically run $150-$600. Severity: medium.

What is the 2017-2025 Porsche 718 Cayman Air-Oil Separator (AOS) Diaphragm Failure?

The air-oil separator in the crankcase ventilation system can fail, with the internal diaphragm tearing. This lets crankcase vacuum spike and draws engine oil into the intake, producing heavy blue/white exhaust smoke (often worst on cold startup or under load), oil residue in the… Repairs typically run $400-$1,200. Severity: medium.

What is the 2017-2025 Porsche 718 Cayman Coolant Expansion Tank (Reservoir) Cracking at Seam Requiring Engine-Out Repair?

The plastic coolant expansion/overflow reservoir on the 982 718 can crack along the seam where its upper and lower halves are joined, causing slow coolant loss that often only appears when the system is hot and pressurized. Forum discussion and a 982 service bulletin tie a higher… Repairs typically run $1,500-$4,000. Severity: medium.

What is the 2017-2025 Porsche 718 Cayman Turbo Wastegate Rattle at Idle?

The 718 Cayman shares the same turbo flat-four engine as the 718 Boxster and exhibits identical wastegate rattle at idle. The metallic buzzing sound is caused by play in the wastegate actuator arm and is the single most common complaint on 718 forums. Severity: low.

What is the 2017-2025 Porsche 718 Cayman Headlight and Taillight Condensation / Internal Lens Coating Defect?

Moisture intrusion in the lighting units is a recurring weak spot on the 718. Owners report water droplets, pooling, or persistent fogging inside PDLS/LED headlights and in the taillights, even on low-mileage, garaged cars, attributed to imperfect housing seals. Separately, a def… Repairs typically run $300-$2,000. Severity: low.

What is the 2017-2021 Porsche 718 Cayman Seized Ignition Coil Bolts During First Spark Plug Service?

When the factory-fitted spark plugs are replaced for the first time (typically the ~4-year / ~40,000-mile service), owners and OPCs frequently find the ignition coil mounting bolts seized in place. The bolt must be drilled out and the coil pack replaced, turning routine plug main… Repairs typically run $250-$700. Severity: low.