Smart (Mcc) Forfour vs Smart Roadster: MOT reliability compared
Updated 05 September 2026.
21.1%
Smart (Mcc) Forfour MOT failure rate, 4.5 pts lower than Smart Roadster
Smart (Mcc) Forfour is the more reliable MOT performer: 21.1% of Smart (Mcc) Forfour MOTs fail versus 25.6% for Smart Roadster, a 4.5 point gap.
| Metric | Smart (Mcc) Forfour | Smart Roadster |
|---|---|---|
| MOT failure rate | 21.1% | 25.6% |
| Tests analysed | 267,501 | 77,228 |
| Most common failure | Tyres (24.8%) | Lamps & electrical (41.7%) |
Questions and answers
Which is more reliable, Smart (Mcc) Forfour or Smart Roadster?
Smart (Mcc) Forfour is the more reliable MOT performer: 21.1% of Smart (Mcc) Forfour MOTs fail versus 25.6% for Smart Roadster, a 4.5 point gap.
What is the MOT failure rate of the Smart (Mcc) Forfour?
21.1% of Smart (Mcc) Forfour MOT tests result in a failure, from 267,501 tests.
What is the MOT failure rate of the Smart Roadster?
25.6% of Smart Roadster MOT tests result in a failure, from 77,228 tests.