Smart Fortwo vs Smart Forfour: MOT reliability compared
Updated 05 September 2026.
22.1%
Smart Fortwo MOT failure rate, 4.7 pts lower than Smart Forfour
Smart Fortwo is the more reliable MOT performer: 22.1% of Smart Fortwo MOTs fail versus 26.8% for Smart Forfour, a 4.7 point gap.
| Metric | Smart Fortwo | Smart Forfour |
|---|---|---|
| MOT failure rate | 22.1% | 26.8% |
| Tests analysed | 132,208 | 74,542 |
| Most common failure | Lamps & electrical (27.6%) | Lamps & electrical (34.4%) |
Questions and answers
Which is more reliable, Smart Fortwo or Smart Forfour?
Smart Fortwo is the more reliable MOT performer: 22.1% of Smart Fortwo MOTs fail versus 26.8% for Smart Forfour, a 4.7 point gap.
What is the MOT failure rate of the Smart Fortwo?
22.1% of Smart Fortwo MOT tests result in a failure, from 132,208 tests.
What is the MOT failure rate of the Smart Forfour?
26.8% of Smart Forfour MOT tests result in a failure, from 74,542 tests.