Caterham Seven vs Caterham Unknown: MOT reliability compared
Updated 05 September 2026.
11.1%
Caterham Unknown MOT failure rate, 2.4 pts lower than Caterham Seven
Caterham Unknown is the more reliable MOT performer: 11.1% of Caterham Unknown MOTs fail versus 13.5% for Caterham Seven, a 2.4 point gap.
| Metric | Caterham Seven | Caterham Unknown |
|---|---|---|
| MOT failure rate | 13.5% | 11.1% |
| Tests analysed | 40,764 | 7,254 |
| Most common failure | Lamps & electrical (31.2%) | Lamps & electrical (32.6%) |
Questions and answers
Which is more reliable, Caterham Seven or Caterham Unknown?
Caterham Unknown is the more reliable MOT performer: 11.1% of Caterham Unknown MOTs fail versus 13.5% for Caterham Seven, a 2.4 point gap.
What is the MOT failure rate of the Caterham Seven?
13.5% of Caterham Seven MOT tests result in a failure, from 40,764 tests.
What is the MOT failure rate of the Caterham Unknown?
11.1% of Caterham Unknown MOT tests result in a failure, from 7,254 tests.