Most reliable Smart: MOT failure rates ranked
Updated 05 September 2026.
10.4%
Smart Eq, the most reliable Smart
The most reliable Smart on MOT failure rate is the Smart Eq, at 10.4% failures across 11,086 tests.
| Rank | Model | MOT failure rate | Tests |
|---|---|---|---|
| 1 | Smart Eq | 10.4% | 11,086 |
| 2 | Smart (Mcc) Forfour | 21.1% | 267,501 |
| 3 | Smart (Mcc) Fortwo | 22.1% | 741,077 |
| 4 | Smart Fortwo | 22.1% | 132,208 |
| 5 | Smart (Mcc) Roadster | 25.3% | 33,633 |
| 6 | Smart Roadster | 25.6% | 77,228 |
| 7 | Smart Forfour | 26.8% | 74,542 |
| 8 | Smart (Mcc) Cabriolet | 27.3% | 38,430 |
| 9 | Smart City | 27.5% | 45,429 |
| 10 | Smart (Mcc) City | 28.5% | 325,945 |
Questions and answers
What is the most reliable Smart at MOT?
The most reliable Smart on MOT failure rate is the Smart Eq, at 10.4% failures across 11,086 tests.
Which Smart fails its MOT most often?
The Smart (Mcc) City has the highest MOT failure rate of the Smart range, at 28.5%.
Compared here
Smart Eq common MOT failures and failure rateSmart (Mcc) Forfour common MOT failures and failure rateSmart (Mcc) Fortwo common MOT failures and failure rateSmart Fortwo common MOT failures and failure rateSmart (Mcc) Roadster common MOT failures and failure rateSmart Roadster common MOT failures and failure rate