2021 Porsche Cayman: common problems and what to check
What gets flagged at MOT on 2021 Porsche Caymans, from 445 tests in 2025, plus known faults and what to look at before you buy one.
Small sample: only 445 of these were MOT tested in 2025, so treat the percentages as rough. The known faults below don't depend on it.
What gets flagged at MOT
The share of 2021 Porsche Cayman MOT tests where testers flagged each area, as a fail or an advisory. Rough prices are typical independent-garage costs.
- Tyres15% of testsRough price £70–£150
At the viewing: Check the tread on all four tyres, including the inside edges, and look for cracks or bulges.
- Wipers, windscreen and mirrors2% of testsRough price £15–£250
At the viewing: Check for chips in the driver's view, and test the wipers and washers.
- Lights and electrics2% of testsRough price £10–£80
At the viewing: Ask a friend to check every light, including brake lights and indicators, while you operate them.
- Brakes2% of testsRough price £150–£350
At the viewing: Look for a lip on the disc edges and feel for judder or pulling when braking firmly from about 40mph.
- Suspension1% of testsRough price £120–£400
At the viewing: Listen for knocks over speed bumps, and look behind each front wheel for a snapped coil spring.
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Other years
| Year | MOT tests | Most flagged |
|---|---|---|
| 2022 | 477 | Tyres 13% |
| 2020 | 440 | Tyres 18% |
| 2019 | 1,002 | Tyres 19% |
| 2018 | 1,195 | Tyres 17% |
| 2017 | 884 | Tyres 19% |
| 2016 | 1,006 | Tyres 13% |
| 2015 | 1,096 | Tyres 16% |
| 2014 | 1,196 | Tyres 17% |
| 2013 | 1,042 | Tyres 17% |
| 2012 | 345 | Brakes 15% |
| 2011 | 540 | Brakes 20% |
| 2010 | 530 | Brakes 25% |
| 2009 | 657 | Brakes 21% |
| 2008 | 853 | Brakes 25% |
| 2007 | 1,388 | Brakes 26% |
| 2006 | 1,449 | Brakes 30% |
| 2005 | 161 | Brakes 27% |
Where this comes from: the DVSA's anonymised results for every MOT test in Great Britain in 2025, counting tests of 2021 Porsche Caymans registered in 2021. "Flagged" includes advisories, so it isn't the same as a fail rate. How we score