Smart Roadster vs Smart City: MOT reliability compared
Updated 05 September 2026.
25.6%
Smart Roadster MOT failure rate, 1.9 pts lower than Smart City
Smart Roadster is the more reliable MOT performer: 25.6% of Smart Roadster MOTs fail versus 27.5% for Smart City, a 1.9 point gap.
| Metric | Smart Roadster | Smart City |
|---|---|---|
| MOT failure rate | 25.6% | 27.5% |
| Tests analysed | 77,228 | 45,429 |
| Most common failure | Lamps & electrical (41.7%) | Lamps & electrical (41.8%) |
Questions and answers
Which is more reliable, Smart Roadster or Smart City?
Smart Roadster is the more reliable MOT performer: 25.6% of Smart Roadster MOTs fail versus 27.5% for Smart City, a 1.9 point gap.
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.
What is the MOT failure rate of the Smart City?
27.5% of Smart City MOT tests result in a failure, from 45,429 tests.