Porsche Boxster vs Porsche Cayenne: MOT reliability compared
Updated 05 September 2026.
15.4%
Porsche Cayenne MOT failure rate, 1.8 pts lower than Porsche Boxster
Porsche Cayenne is the more reliable MOT performer: 15.4% of Porsche Cayenne MOTs fail versus 17.2% for Porsche Boxster, a 1.8 point gap.
| Metric | Porsche Boxster | Porsche Cayenne |
|---|---|---|
| MOT failure rate | 17.2% | 15.4% |
| Tests analysed | 736,425 | 406,237 |
| Most common failure | Lamps & electrical (28.2%) | Tyres (29.2%) |
Questions and answers
Which is more reliable, Porsche Boxster or Porsche Cayenne?
Porsche Cayenne is the more reliable MOT performer: 15.4% of Porsche Cayenne MOTs fail versus 17.2% for Porsche Boxster, a 1.8 point gap.
What is the MOT failure rate of the Porsche Boxster?
17.2% of Porsche Boxster MOT tests result in a failure, from 736,425 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.