Porsche Cayman vs Porsche 924: MOT reliability compared
Updated 05 September 2026.
11.2%
Porsche Cayman MOT failure rate, 19.2 pts lower than Porsche 924
Porsche Cayman is the more reliable MOT performer: 11.2% of Porsche Cayman MOTs fail versus 30.4% for Porsche 924, a 19.2 point gap.
| Metric | Porsche Cayman | Porsche 924 |
|---|---|---|
| MOT failure rate | 11.2% | 30.4% |
| Tests analysed | 188,582 | 35,782 |
| Most common failure | Lamps & electrical (23.9%) | Brakes (45.8%) |
Questions and answers
Which is more reliable, Porsche Cayman or Porsche 924?
Porsche Cayman is the more reliable MOT performer: 11.2% of Porsche Cayman MOTs fail versus 30.4% for Porsche 924, a 19.2 point gap.
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.
What is the MOT failure rate of the Porsche 924?
30.4% of Porsche 924 MOT tests result in a failure, from 35,782 tests.