Diesel BMW 635: MOT pass rate
78.1% of diesel BMW 635s pass the MOT first time, measured across 1,509 DVSA tests on that fuel type alone. Average mileage at test was 126,017.
Diesel against the other BMW 635 versions
| Fuel | Pass rate | Tests |
|---|---|---|
| Diesel | 78.1% | 1,509 |
| Petrol | 83.3% | 401 |
| All BMW 635 | 79.2% | 1,910 |
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 BMW 635 specifically, petrol is the strongest at 83.3%, and this diesel version sits 1.1 points below the 79.2% model average.
What it means if you are buying one
The diesel BMW 635 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 BMW 635 had covered 126,017 miles at test, against 111,860 for the petrol. 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 BMW 635 page separate age from fuel if you want to isolate one.
Other BMW 635 fuel types
- Petrol BMW 635 - 83.3%