Porsche 911 vs Porsche Cayenne: MOT reliability compared
Updated 05 September 2026.
14.6%
Porsche 911 MOT failure rate, 0.8 pts lower than Porsche Cayenne
Porsche 911 is the more reliable MOT performer: 14.6% of Porsche 911 MOTs fail versus 15.4% for Porsche Cayenne, a 0.8 point gap.
| Metric | Porsche 911 | Porsche Cayenne |
|---|---|---|
| MOT failure rate | 14.6% | 15.4% |
| Tests analysed | 1,015,318 | 406,237 |
| Most common failure | Lamps & electrical (32.2%) | Tyres (29.2%) |
Questions and answers
Which is more reliable, Porsche 911 or Porsche Cayenne?
Porsche 911 is the more reliable MOT performer: 14.6% of Porsche 911 MOTs fail versus 15.4% for Porsche Cayenne, a 0.8 point gap.
What is the MOT failure rate of the Porsche 911?
14.6% of Porsche 911 MOT tests result in a failure, from 1,015,318 tests.
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.