Diesel Smart (Mcc) Forfour: MOT pass rate
62.3% of diesel Smart (Mcc) Forfours pass the MOT first time, measured across 215 DVSA tests on that fuel type alone. Average mileage at test was 113,489.
Diesel against the other Smart (Mcc) Forfour versions
| Fuel | Pass rate | Tests |
|---|---|---|
| Petrol | 79.1% | 22,112 |
| Electric | 84.8% | 381 |
| Diesel | 62.3% | 215 |
| All Smart (Mcc) Forfour | 79% | 22,713 |
Why the fuel type changes the number
Diesels carry DPFs, EGR valves and stricter smoke limits, so emissions and exhaust faults account for failures petrol cars never see.
On the Smart (Mcc) Forfour specifically, electric is the strongest at 84.8%, and this diesel version sits 16.7 points below the 79% model average.
What it means if you are buying one
The diesel Smart (Mcc) Forfour fails more often than the model average, so budget for the items that catch this fuel type and treat a fresh MOT as worth paying for. Check the exact car, decode the VIN and check the mileage before you bid.
Mileage is part of the answer
The average diesel Smart (Mcc) Forfour had covered 113,489 miles at test, against 45,301 for the petrol and 21,152 for the electric. That is high mileage, so timing belts, clutches, suspension bushes and corrosion are the items worth budgeting for rather than the MOT itself.
Fuel type and mileage are tangled together: diesels are usually bought by higher-mileage drivers, so some of any gap between fuels is the miles rather than the engine. The per-year figures on the Smart (Mcc) Forfour page separate age from fuel if you want to isolate one.
Other Smart (Mcc) Forfour fuel types
- Petrol Smart (Mcc) Forfour - 79.1%
- Electric Smart (Mcc) Forfour - 84.8%