Porsche Cayenne vs Porsche Cayman: MOT reliability compared
Updated 05 September 2026.
11.2%
Porsche Cayman MOT failure rate, 4.2 pts lower than Porsche Cayenne
Porsche Cayman is the more reliable MOT performer: 11.2% of Porsche Cayman MOTs fail versus 15.4% for Porsche Cayenne, a 4.2 point gap.
| Metric | Porsche Cayenne | Porsche Cayman |
|---|---|---|
| MOT failure rate | 15.4% | 11.2% |
| Tests analysed | 406,237 | 188,582 |
| Most common failure | Tyres (29.2%) | Lamps & electrical (23.9%) |
Questions and answers
Which is more reliable, Porsche Cayenne or Porsche Cayman?
Porsche Cayman is the more reliable MOT performer: 11.2% of Porsche Cayman MOTs fail versus 15.4% for Porsche Cayenne, a 4.2 point gap.
What is the MOT failure rate of the Porsche Cayenne?
15.4% of Porsche Cayenne MOT tests result in a failure, from 406,237 tests.
What is the MOT failure rate of the Porsche Cayman?
11.2% of Porsche Cayman MOT tests result in a failure, from 188,582 tests.