What is the 2006-2016 Porsche Cayman Cylinder Bore Scoring?

The Cayman M97 and MA1 flat-six engines develop bore scoring on cylinders 1 and 6, identical to the pattern seen in the 911 and Boxster. The Cayman GT4 with its 3.8L 911-derived engine is also affected. Oil starvation at the cylinder walls during cold starts is the primary cause. Repairs typically run $7,000-$20,000. Severity: high.

What is the 2021 Porsche Cayman Recall 21V200000: Connecting Rods May Crack and Loosen (2021 Cayman GT4 / GTS 4.0)?

Porsche Cars North America recalled certain 2021 Porsche Cayman models — specifically the Cayman GT4 and Cayman GTS 4.0 — under NHTSA campaign 21V200000 (Porsche recall number AMA4) because the engine connecting rods may crack and loosen. If a rod connection comes loose while the… Severity: high.

What is the 2019-2021 Porsche Cayman 718 Cayman (982) Gasoline Particulate Filter (GPF/OPF) Failure?

EU-spec 718 Caymans built from the 2019 model year onward carry a gasoline particulate filter integrated into the catalytic converter assembly. A production-era software fault plus high oil-ash loading causes the GPF to clog and fail, often with no warning light beforehand. Becau… Repairs typically run $2,500-$7,500. Severity: high.

What is the 2009-2016 Porsche Cayman PDK Dual-Clutch Mechatronic / Clutch-Pack Faults?

The 7-speed PDK can develop jerky or delayed shifting, shudder, or drop into limp/emergency mode. The most common root causes are mechatronic-unit problems (the hydraulic valve body, solenoids, and the distance/position sensors that are the most frequent failure point) and, with… Repairs typically run $1,500-$6,000. Severity: high.

What is the 2017-2020 Porsche Cayman 718 Cayman (982) Early Turbo-Four High Oil Consumption?

A number of early 2.0L and 2.5L turbocharged flat-four 718 engines consume oil at a high rate — owners report roughly a quart per 1,000 miles, with the worst cases needing engine replacement under warranty. Some 2019 2.0L cars also suffered oil-separator (PCV) diaphragm failures… Repairs typically run $500-$8,000. Severity: high.

What is the 2006-2012 Porsche Cayman Air-Oil Separator (AOS) Failure?

The Cayman M97 engine shares the same AOS weakness as the Boxster and 911. The diaphragm ruptures, causing vacuum leaks, excessive oil consumption, and fouled spark plugs. The mid-engine layout makes the AOS moderately accessible for replacement. Repairs typically run $400-$1,200. Severity: medium.

What is the 2006-2016 Porsche Cayman AC Compressor Failure and Clutch Burnout?

The AC compressor on the Cayman fails prematurely, often due to clutch bearing wear or internal seal failure. The mid-engine layout subjects the AC system to higher ambient temperatures. When the compressor clutch fails, it can throw the serpentine belt and disable all accessorie… Repairs typically run $1,000-$2,500. Severity: medium.

What is the 2006-2016 Porsche Cayman Front Radiator / A/C Condenser Corrosion and Debris-Trapped Leaks?

The twin radiators and A/C condensers sit low behind the front bumper grilles, directly in the path of road debris, leaves, and salt. Debris packs between the condenser and radiator, traps moisture, and corrodes the aluminum until it perforates; rocks also puncture the exposed fi… Repairs typically run $300-$1,200. Severity: medium.

What is the 2006-2012 Porsche Cayman Ignition Switch Failure / No-Start (Key Not Responding)?

The electrical ignition switch behind the lock cylinder wears out, so turning the key produces nothing — no dash lights, no steering-lock click, no crank. The lock cylinder can also become stiff, fail to return, or trap the key. It is a well-documented 987 Cayman/Boxster fault di… Repairs typically run $150-$600. Severity: medium.

What is the 2006-2016 Porsche Cayman Coolant Expansion Tank and Cap Failure / Cooling System Leaks?

The plastic coolant expansion (header) tank develops hairline cracks at the seams from heat cycling and age, and the pressure cap frequently fails — losing seal and letting the system lose pressure. The result is slow coolant loss that often evaporates off hot components without… Repairs typically run $150-$900. Severity: medium.

What is the 2006-2012 Porsche Cayman Rear Main Seal (RMS) Oil Leak?

The crankshaft rear main seal between the engine and transmission weeps oil, which appears as drips from the bell-housing seam. On the M96/M97 flat-six it is frequently aggravated by a failing air-oil separator that pushes crankcase pressure too high under hard acceleration, dama… Repairs typically run $900-$2,500. Severity: medium.

What is the 2006-2016 Porsche Cayman Front Suspension Clunk — Control Arms, Sway Bar Bushings, Drop Links?

Higher-mileage cars develop a clunk or rattle over bumps at low speed. Common culprits are worn lower-control-arm ball joints and bushings, a sway (anti-roll) bar that has gone loose inside its rubber mount bushings, and worn drop links (sway bar end links). Owners frequently cha… Repairs typically run $100-$900. Severity: low.

Porsche · Known Issues

2006-2021 Porsche Cayman Problems: 13 Known Issues

2006-2021 model years · 7,800+ owner reports · Updated August 2026

Share:@au7o.io

According to Au7o's analysis of 7,800+ owner reports, the 2006-2021 Porsche Cayman has 13 documented known issues, with 6 rated critical. The most serious are Intermediate Shaft (IMS) Bearing Failure ($1,800-$4,000 repair), Cylinder Bore Scoring ($7,000-$20,000 repair), Recall 21V200000: Connecting Rods May Crack and Loosen (2021 Cayman GT4 / GTS 4.0), 718 Cayman (982) Gasoline Particulate Filter (GPF/OPF) Failure ($2,500-$7,500 repair), PDK Dual-Clutch Mechatronic / Clutch-Pack Faults ($1,500-$6,000 repair) and 718 Cayman (982) Early Turbo-Four High Oil Consumption ($500-$8,000 repair). The most commonly reported issue is Intermediate Shaft (IMS) Bearing Failure with 2,800 owner reports. Across all issues with published estimates, repair costs range from $100 to $20,000. DIY maintenance guides at au7o.io.

Frequently Asked Questions

What are the most common Porsche Cayman problems?

According to Au7o's analysis of 7,800+ owner reports, the 2006-2021 Porsche Cayman has 13 documented issues. The most frequently reported are: Intermediate Shaft (IMS) Bearing Failure, Cylinder Bore Scoring, Recall 21V200000: Connecting Rods May Crack and Loosen (2021 Cayman GT4 / GTS 4.0). Of these, 6 are rated critical and should be addressed promptly.

Is the Porsche Cayman reliable?

The 2006-2021 Porsche Cayman has 13 known issues documented across 7,800+ owner reports. 6 issues are rated critical: Intermediate Shaft (IMS) Bearing Failure and Cylinder Bore Scoring and Recall 21V200000: Connecting Rods May Crack and Loosen (2021 Cayman GT4 / GTS 4.0) and 718 Cayman (982) Gasoline Particulate Filter (GPF/OPF) Failure and PDK Dual-Clutch Mechatronic / Clutch-Pack Faults and 718 Cayman (982) Early Turbo-Four High Oil Consumption. 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 Cayman problems?

Repair costs for known Porsche Cayman issues range from $100 to $20,000, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, Intermediate Shaft (IMS) Bearing Failure, typically costs $1,800-$4,000 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

What year Porsche Cayman is the most reliable?

Reliability varies across model years of the Porsche Cayman. Based on documented issues, problems are most commonly reported in earlier model years. Au7o recommends checking the specific known issues for your target year before purchasing, and having a pre-purchase inspection performed by a qualified mechanic. Our known issues database covers the 2006-2021 Porsche Cayman with 13 documented issues documented across 7,800+ owner reports.

What is the 2006-2012 Porsche Cayman Intermediate Shaft (IMS) Bearing Failure?

The Cayman shares the M97 engine with the 911 and Boxster, inheriting the IMS bearing weakness. The 2006-2008 single-row bearing variant is the highest risk. The Cayman R with its 3.4L engine is equally susceptible despite its performance-oriented positioning. Repairs typically run $1,800-$4,000. Severity: high.

All 13 Known Issues

Other Porsche Models

Frequently Asked Questions

What are the most common Porsche Cayman problems?

Is the Porsche Cayman reliable?

How much does it cost to fix common Porsche Cayman problems?

What year Porsche Cayman is the most reliable?

What is the 2006-2012 Porsche Cayman Intermediate Shaft (IMS) Bearing Failure?

When Issues Typically Appear

Intermediate Shaft (IMS) Bearing Failure#

Cylinder Bore Scoring#

Recall 21V200000: Connecting Rods May Crack and Loosen (2021 Cayman GT4 / GTS 4.0)#

718 Cayman (982) Early Turbo-Four High Oil Consumption#

Air-Oil Separator (AOS) Failure#

Rear Main Seal (RMS) Oil Leak#

718 Cayman (982) Gasoline Particulate Filter (GPF/OPF) Failure#

PDK Dual-Clutch Mechatronic / Clutch-Pack Faults#

Front Radiator / A/C Condenser Corrosion and Debris-Trapped Leaks#

Coolant Expansion Tank and Cap Failure / Cooling System Leaks#

AC Compressor Failure and Clutch Burnout#

Ignition Switch Failure / No-Start (Key Not Responding)#

Front Suspension Clunk — Control Arms, Sway Bar Bushings, Drop Links#