Diesel Kia Stonic: MOT pass rate
86.4% of diesel Kia Stonics pass the MOT first time, measured across 2,320 DVSA tests on that fuel type alone. Average mileage at test was 50,472.
Diesel against the other Kia Stonic versions
| Fuel | Pass rate | Tests |
|---|---|---|
| Petrol | 90.6% | 16,811 |
| Diesel | 86.4% | 2,320 |
| All Kia Stonic | 90.1% | 19,134 |
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 Kia Stonic specifically, petrol is the strongest at 90.6%, and this diesel version sits 3.7 points below the 90.1% model average.
What it means if you are buying one
The diesel Kia Stonic 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 Kia Stonic had covered 50,472 miles at test, against 33,789 for the petrol. That is around average, so condition and service history will tell you more than the odometer does.
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 Kia Stonic page separate age from fuel if you want to isolate one.
Other Kia Stonic fuel types
- Petrol Kia Stonic - 90.6%