2018 Porsche Cayman MOT pass rate: 94.5% (3,525 tests)
Is the 2018 Cayman getting worse?
Pass rate of 2018-registered cars across recent test years:
| Test year | Pass rate | |
|---|---|---|
| 2023 | 95.0% +7.0 vs same-age |
|
| 2024 | 94.1% +7.9 vs same-age |
|
| 2025 | 94.4% +9.6 vs same-age |
The raw rate normally falls as cars age. The “vs same-age” figure compares this cohort with all UK cars registered in the same year, so normal ageing is not mistaken for a bad model year.
What fails on a 2018 Cayman
| # | System | Defects recorded | Share |
|---|---|---|---|
| 1 | Tyres | 178 | 61.8% |
| 2 | Visibility | 32 | 11.1% |
| 3 | Lamps, reflectors and electrical equipment | 28 | 9.7% |
| 4 | Brakes | 16 | 5.6% |
| 5 | Identification of the vehicle | 14 | 4.9% |
| 6 | Noise, emissions and leaks | 9 | 3.1% |
All Cayman years compared
| Registration year | Tests | Pass rate | Vs same-age | Median mileage |
|---|---|---|---|---|
| 2006 | 4,245 | 81.7% | +17.2 pts | 77,220 |
| 2007 | 4,063 | 83.6% | +18.4 pts | 75,866 |
| 2008 | 2,558 | 82.6% | +17.5 pts | 70,832 |
| 2009 | 1,922 | 89.5% | +23.1 pts | 64,800 |
| 2010 | 1,567 | 88.8% | +21.5 pts | 62,492 |
| 2011 | 1,505 | 90.3% | +21.2 pts | 51,630 |
| 2013 | 2,452 | 91.8% | +18.5 pts | 47,378 |
| 2014 | 3,532 | 92.8% | +17.0 pts | 43,456 |
| 2015 | 3,247 | 94.6% | +15.9 pts | 33,375 |
| 2016 | 2,912 | 94.7% | +13.4 pts | 26,817 |
| 2017 | 2,624 | 94.4% | +10.4 pts | 30,330 |
| 2018 (this page) | 3,525 | 94.5% | +8.1 pts | 26,542 |
| 2019 | 2,983 | 94.9% | +6.5 pts | 21,774 |
- Free MOT history checkThe exact car’s failures, advisories and mileage trail — sellers can’t edit it
- Topdon OBD2 scannersTopdon diagnostic scanners with full-system readouts
- XTOOL diagnostic toolsXTOOL code readers for petrol and diesel cars
- Autel UK testersAutel professional-grade diagnostic testers
FAQs
Is a 2018 Porsche Cayman reliable?
2018-registered examples passed 94.5% of their MOT tests (3,525 tests, 2023–2025), +8.1 points versus all UK cars registered in the same year. At roughly 8 years old with a median 26,542 miles, condition now varies car by car — always check the individual MOT history.
What mileage is too high for a 2018 Cayman?
The median tested example shows 26,542 miles. Anything far beyond that isn't automatically bad — a motorway-mile car with consistent service records often beats a low-mileage school-run car — but price accordingly and scrutinise the mileage trail for gaps or drops.
Source: DVSA Anonymised MOT tests and results, 2023–2025 extracts (96 million Class 4 initial tests; retests excluded). Only vehicles old enough for a routine first MOT are included. Age-adjusted figures compare the model-year cohort with all vehicles of the same registration year tested in the same calendar year. Contains public sector information licensed under OGL v3.0.