Porsche 911 vs Porsche 924: MOT reliability compared
Updated 05 September 2026.
14.6%
Porsche 911 MOT failure rate, 15.8 pts lower than Porsche 924
Porsche 911 is the more reliable MOT performer: 14.6% of Porsche 911 MOTs fail versus 30.4% for Porsche 924, a 15.8 point gap.
| Metric | Porsche 911 | Porsche 924 |
|---|---|---|
| MOT failure rate | 14.6% | 30.4% |
| Tests analysed | 1,015,318 | 35,782 |
| Most common failure | Lamps & electrical (32.2%) | Brakes (45.8%) |
Questions and answers
Which is more reliable, Porsche 911 or Porsche 924?
Porsche 911 is the more reliable MOT performer: 14.6% of Porsche 911 MOTs fail versus 30.4% for Porsche 924, a 15.8 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 924?
30.4% of Porsche 924 MOT tests result in a failure, from 35,782 tests.