Porsche · Known Issues

2021 Porsche Cayman Problems: 2 Known Issues

2021 model year · NHTSA recalls, manufacturer TSBs, and owner forum reports · Updated August 2026

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2021 Porsche Cayman has 2 documented known issues, with 2 rated critical. The most serious are Recall 21V200000: Connecting Rods May Crack and Loosen (2021 Cayman GT4 / GTS 4.0) and 718 Cayman (982) Gasoline Particulate Filter (GPF/OPF) Failure ($2,500-$7,500 repair). Across all issues with published estimates, repair costs range from $2,500 to $7,500. DIY maintenance guides at au7o.io.

Frequently Asked Questions

What are the most common Porsche Cayman problems?

According to Au7o's research across NHTSA recalls, manufacturer TSBs, and owner forum reports, the 2021 Porsche Cayman has 2 documented issues. The most frequently reported are: Recall 21V200000: Connecting Rods May Crack and Loosen (2021 Cayman GT4 / GTS 4.0), 718 Cayman (982) Gasoline Particulate Filter (GPF/OPF) Failure. Of these, 2 are rated critical and should be addressed promptly.

Is the Porsche Cayman reliable?

The 2021 Porsche Cayman has 2 known issues compiled from NHTSA recalls, manufacturer TSBs, and owner forum reports. 2 issues are rated critical: Recall 21V200000: Connecting Rods May Crack and Loosen (2021 Cayman GT4 / GTS 4.0) and 718 Cayman (982) Gasoline Particulate Filter (GPF/OPF) 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 Porsche Cayman problems?

Repair costs for known Porsche Cayman issues range from $2,500 to $7,500, depending on the specific problem and whether you choose DIY or professional repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.

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.

2021 Porsche Cayman Problems: 2 Known Issues

All 2 Known Issues

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

Common Symptoms

How to Fix

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2019-2021 Porsche Cayman: 718 Cayman (982) Gasoline Particulate Filter (GPF/OPF) Failure#