Diesel Mazda Cx-3: MOT pass rate
84.6% of diesel Mazda Cx-3s pass the MOT first time, measured across 2,950 DVSA tests on that fuel type alone. Average mileage at test was 64,037.
Diesel against the other Mazda Cx-3 versions
| Fuel | Pass rate | Tests |
|---|---|---|
| Petrol | 88.7% | 22,014 |
| Diesel | 84.6% | 2,950 |
| All Mazda Cx-3 | 88.2% | 24,964 |
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 Mazda Cx-3 specifically, petrol is the strongest at 88.7%, and this diesel version sits 3.6 points below the 88.2% model average.
What it means if you are buying one
The diesel Mazda Cx-3 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 Mazda Cx-3 had covered 64,037 miles at test, against 41,650 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 Mazda Cx-3 page separate age from fuel if you want to isolate one.
Other Mazda Cx-3 fuel types
- Petrol Mazda Cx-3 - 88.7%