Diesel Peugeot 508: MOT pass rate
75.3% of diesel Peugeot 508s pass the MOT first time, measured across 15,859 DVSA tests on that fuel type alone. Average mileage at test was 101,356.
Diesel against the other Peugeot 508 versions
| Fuel | Pass rate | Tests |
|---|---|---|
| Diesel | 75.3% | 15,859 |
| Petrol | 84.3% | 1,506 |
| All Peugeot 508 | 75.9% | 17,845 |
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 Peugeot 508 specifically, petrol is the strongest at 84.3%, and this diesel version sits 0.6 points below the 75.9% 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 Peugeot 508 had covered 101,356 miles at test, against 40,891 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 Peugeot 508 page separate age from fuel if you want to isolate one.
Other Peugeot 508 fuel types
- Petrol Peugeot 508 - 84.3%