Diesel BMW X7: MOT pass rate

85.1% of diesel BMW X7s pass the MOT first time, measured across 872 DVSA tests on that fuel type alone. Average mileage at test was 45,123.

Diesel against the other BMW X7 versions

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 X7 specifically, petrol is the strongest at 86.3%, and this diesel version sits 0.3 points below the 85.4% 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. Buying a damaged one? run it through the analyzer, check the exact car, decode the VIN and check the mileage before you bid.

Mileage is part of the answer

The average diesel BMW X7 had covered 45,123 miles at test, against 37,135 for the petrol. That is below average for a car this age, worth a mileage-consistency check since an unusually low reading is sometimes clocking rather than luck.

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 X7 page separate age from fuel if you want to isolate one.

Most common MOT failures on a diesel BMW X7

1. Number plate does not conform to the specified requirements, 1.7% of tests (9.24x the national rate for this defect)
2. A tyre seriously damaged, 10.7% of tests (3.83x the national rate for this defect)
3. A tyre cords visible or damaged, 5.5% of tests (3.26x the national rate for this defect)
4. Tyre tread depth not in accordance with the requirements, 2.3% of tests
5. Engine MIL illuminated indicating a malfunction, 1% of tests
6. Windscreen washers not working or not providing sufficient fluid to clear the windscreen, 0.9% of tests
7. A direction indicator lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning, 0.5% of tests
8. A suspension pin, bush or joint excessively worn, 0.5% of tests
9. Brake lining or pad worn down to wear indicator, 0.5% of tests (2.29x the national rate for this defect)
10. Any fracture or welding defect on a wheel, 0.3% of tests (5.81x the national rate for this defect)

From 878 DVSA-tracked diesel BMW X7 tests, 2024, split out from the BMW X7's other fuel types. DVSA testers marked 10.09% of these flagged defects as "dangerous", against 5.11% nationally. See which fuel type fails on the most dangerous defects nationally for how that compares across the whole fleet.

Most common MOT advisories on a diesel BMW X7

Flagged but doesn't fail the car, a different list from the failures above.

1. Tyre tread depth not in accordance with the requirements, 31.4% of tests (1.18x the national rate for this defect), also fails
2. A tyre seriously damaged, 6.5% of tests, also fails
3. a brake lining or pad worn below 1.5mm, 5.8% of tests
4. A suspension pin, bush or joint excessively worn, 4% of tests, also fails
5. Brake disc or drum significantly and obviously worn, 2.3% of tests
6. Brake disc or drum excessively weakened, insecure or fractured, 1.9% of tests
7. Number plate inscription missing or illegible, 0.7% of tests
8. A tyre fouling a part of the vehicle, 0.5% of tests (83.08x the national rate for this defect)
9. Fluid leaking excessively and likely to harm the environment or to pose a safety risk to other road users, 0.2% of tests
10. An obstruction significantly affecting the driver's view of the road through the swept area of the windscreen or an obligatory external mirror not visible, 0.1% of tests (1.39x the national rate for this defect)

From 878 DVSA-tracked diesel BMW X7 tests, 2024.

Other BMW X7 fuel types

• Petrol BMW X7 - 86.3%

All BMW X7 MOT data · Every model