Porsche 911 vs Porsche Boxster: MOT reliability compared
Updated 05 September 2026.
14.6%
Porsche 911 MOT failure rate, 2.6 pts lower than Porsche Boxster
Porsche 911 is the more reliable MOT performer: 14.6% of Porsche 911 MOTs fail versus 17.2% for Porsche Boxster, a 2.6 point gap.
| Metric | Porsche 911 | Porsche Boxster |
|---|---|---|
| MOT failure rate | 14.6% | 17.2% |
| Tests analysed | 1,015,318 | 736,425 |
| Most common failure | Lamps & electrical (32.2%) | Lamps & electrical (28.2%) |
Questions and answers
Which is more reliable, Porsche 911 or Porsche Boxster?
Porsche 911 is the more reliable MOT performer: 14.6% of Porsche 911 MOTs fail versus 17.2% for Porsche Boxster, a 2.6 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 Boxster?
17.2% of Porsche Boxster MOT tests result in a failure, from 736,425 tests.