Diesel BMW X4: MOT pass rate

86.3% of diesel BMW X4s pass the MOT first time, measured across 13,646 DVSA tests on that fuel type alone. Average mileage at test was 63,193.

Diesel against the other BMW X4 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 X4 specifically, petrol is the strongest at 90.8%, and this diesel version sits 0.3 points below the 86.6% 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. 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 X4 had covered 63,193 miles at test, against 34,881 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 BMW X4 page separate age from fuel if you want to isolate one.

Most common MOT failures on a diesel BMW X4

1. Number plate does not conform to the specified requirements, 0.6% of tests (3.01x the national rate for this defect)
2. Brake lining or pad worn down to wear indicator, 0.4% of tests (1.91x the national rate for this defect)
3. A wheel with a loose or missing wheel nut, bolt or stud, 0.5% of tests (1.58x the national rate for this defect)
4. A tyre seriously damaged, 3.1% of tests
5. Tyre tread depth not in accordance with the requirements, 2.9% of tests
6. A spring or spring component fractured or seriously weakened, 2.2% of tests
7. Wiper blade missing or obviously not clearing the windscreen, 2.2% of tests
8. A tyre cords visible or damaged, 1.7% of tests
9. a brake lining or pad worn below 1.5mm, 1.6% of tests
10. Windscreen washers not working or not providing sufficient fluid to clear the windscreen, 1.1% of tests

From 13,682 DVSA-tracked diesel BMW X4 tests, 2024, split out from the BMW X4's other fuel types. DVSA testers marked 7.89% 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 X4

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

1. Free play in the steering, measured at the rim of the steering wheel is excessive, 0.2% of tests (1.19x the national rate for this defect)
2. Tyre tread depth not in accordance with the requirements, 30% of tests, also fails
3. a brake lining or pad worn below 1.5mm, 9.9% of tests, also fails
4. A tyre seriously damaged, 7.1% of tests, also fails
5. Brake disc or drum excessively weakened, insecure or fractured, 5.5% of tests
6. A suspension pin, bush or joint excessively worn, 3.3% of tests
7. Brake disc or drum significantly and obviously worn, 2.9% of tests
8. A spring or spring component fractured or seriously weakened, 1.9% of tests, also fails
9. A shock absorber damaged to the extent that it does not function or showing signs of severe leakage, 1.8% of tests
10. Fluid leaking excessively and likely to harm the environment or to pose a safety risk to other road users, 1.6% of tests

From 13,682 DVSA-tracked diesel BMW X4 tests, 2024.

Other BMW X4 fuel types

• Petrol BMW X4 - 90.8%

All BMW X4 MOT data · Every model