MOT failure data · 2025
Porsche Cayman MOT problems
Across every Porsche Cayman that failed its 2025 MOT, the defect testers recorded most often was tread depth tread depth below requirements of 1.6mm, on 9.08% of failure items. The broadest problem area was brakes at 20.98%. These are recorded defects across the model, not a diagnosis of any one car.
Most common Porsche Cayman MOT failures
| # | Recorded defect | Area | Share |
|---|---|---|---|
| 1 | Tread depth tread depth below requirements of 1.6mm | Tyres | 9.08% |
| 2 | Rigid brake pipes excessively corroded | Brakes | 6.59% |
| 3 | Position lamp not working | Lamps, reflectors and electrical equipment | 6.34% |
| 4 | Catalyst emissions lambda reading after 2nd fast idle outside specified limits | Noise, emissions and leaks | 4.95% |
| 5 | Coil spring fractured or broken | Suspension | 4.84% |
| 6 | Condition has a cut in excess of the requirements deep enough to reach the ply or cords | Tyres | 3.67% |
| 7 | Ball joint ball joint excessively worn | Suspension | 2.96% |
| 8 | Wipers does not clear the windscreen effectively | Visibility | 2.85% |
| 9 | Headlamp aim too high | Lamps, reflectors and electrical equipment | 2.81% |
| 10 | Condition has ply or cords exposed | Tyres | 2.35% |
Shares are of all recorded failure items for this model, so they sum to less than 100% — a single failed test often records several defects, and the long tail below the top 10 is not shown.
What this means if you are buying one
Use it as a viewing checklist. If you are looking at a Porsche Cayman, these are the areas worth inspecting and worth asking about — and worth reading the car's own MOT history for, since a defect that keeps reappearing as an advisory is a better signal than any model-wide average.
The MOT record also has hard limits: it does not check the engine, clutch or gearbox, and it says nothing about outstanding finance, insurance write-off history, stolen markers or whether the mileage is genuine. Our used Porsche Cayman buying guide covers what to check beyond the MOT.
Checking a specific Porsche Cayman?
Enter its registration for finance, write-off, stolen, mileage and keeper history.
Other Porsche models
- Porsche 911 MOT problems
- Porsche Macan MOT problems
- Porsche Boxster MOT problems
- Porsche Cayenne MOT problems
- Porsche Taycan MOT problems
- Porsche Panamera MOT problems
Porsche Cayman MOT FAQs
What does a Porsche Cayman most commonly fail its MOT on?
The single most recorded defect on Porsche Cayman cars failing their 2025 MOT was "tread depth tread depth below requirements of 1.6mm", appearing on 9.08% of failure items.
Does this mean my Porsche Cayman will fail?
No. This is what testers recorded across every Porsche Cayman that failed in 2025. It shows where this model tends to need attention, not the condition of any individual car. The Porsche Cayman passed 90.58% of its initial tests.
How do I see a specific Porsche Cayman's MOT history?
Enter its registration on our free MOT history check to see that car's own test results, advisories and recorded mileages.
See also: Porsche Cayman MOT pass rate · used Porsche Cayman buying guide · free MOT history check
Defect counts from the DVSA MOT Anonymised test-item data for 2025 (class 4 initial tests, failure items only — advisories and minor defects excluded), licensed under the Open Government Licence v3.0.