Diesel Mazda 6: MOT pass rate
74.3% of diesel Mazda 6s pass the MOT first time, measured across 32,906 DVSA tests on that fuel type alone. Average mileage at test was 101,636.
Diesel against the other Mazda 6 versions
| Fuel | Pass rate | Tests |
|---|---|---|
| Diesel | 74.3% | 32,906 |
| Petrol | 75% | 28,464 |
| All Mazda 6 | 74.6% | 61,393 |
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 6 specifically, petrol is the strongest at 75%, and this diesel version sits 0.3 points below the 74.6% model average.
What it means if you are buying one
There is little to choose between fuel types on this model, so decide on running costs and mileage rather than MOT record. Check the exact car, decode the VIN and check the mileage before you bid.
Mileage is part of the answer
The average diesel Mazda 6 had covered 101,636 miles at test, against 83,746 for the petrol. That is above average and into the range where cambelts and water pumps are due if they have not already been done, so ask for the service history rather than take the mileage on trust.
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 6 page separate age from fuel if you want to isolate one.
Other Mazda 6 fuel types
- Petrol Mazda 6 - 75%