Diesel BMW 430: MOT pass rate

85% of diesel BMW 430s pass the MOT first time, measured across 9,515 DVSA tests on that fuel type alone. Average mileage at test was 73,578.

Diesel against the other BMW 430 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 430 specifically, petrol is the strongest at 87.6%, and this diesel version sits 0.7 points below the 85.7% 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 430 had covered 73,578 miles at test, against 44,962 for the petrol. That is a shade above the middle of the range, still ordinary wear rather than a red flag, but worth checking against the service book for the car's age.

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

Most common MOT failures on a diesel BMW 430

1. Any fracture or welding defect on a wheel, 0.8% of tests (13.54x the national rate for this defect)
2. Number plate does not conform to the specified requirements, 0.6% of tests (3.01x the national rate for this defect)
3. A tyre cords visible or damaged, 3.8% of tests (2.27x the national rate for this defect)
4. A tyre has a lump, bulge or tear caused by separation or partial failure of its structure. This includes any lifting of the tread rubber, 0.4% of tests (2x the national rate for this defect)
5. A tyre seriously damaged, 5.4% of tests (1.92x the national rate for this defect)
6. A shock absorber damaged to the extent that it does not function or showing signs of severe leakage, 1.4% of tests (1.48x the national rate for this defect)
7. A wheel with a loose or missing wheel nut, bolt or stud, 0.4% of tests (1.22x the national rate for this defect)
8. Tyre tread depth not in accordance with the requirements, 2.6% of tests
9. A suspension pin, bush or joint excessively worn, 1.2% of tests
10. a brake lining or pad worn below 1.5mm, 1.1% of tests

From 9,539 DVSA-tracked diesel BMW 430 tests, 2024, split out from the BMW 430's other fuel types. DVSA testers marked 11.64% 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 430

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, 0.3% of tests (1.71x the national rate for this defect)
2. Tyre tread depth not in accordance with the requirements, 31% of tests (1.16x the national rate for this defect), also fails
3. Brake disc or drum excessively weakened, insecure or fractured, 9.6% of tests
4. a brake lining or pad worn below 1.5mm, 9% of tests, also fails
5. A tyre seriously damaged, 6% of tests, also fails
6. A suspension pin, bush or joint excessively worn, 5.3% of tests, also fails
7. A shock absorber damaged to the extent that it does not function or showing signs of severe leakage, 3.6% of tests, also fails
8. Brake disc or drum significantly and obviously worn, 2.3% of tests
9. Fluid leaking excessively and likely to harm the environment or to pose a safety risk to other road users, 1.3% of tests
10. A wheel badly distorted or wear between wheel and hub at spigot mounting, 0.9% of tests

From 9,539 DVSA-tracked diesel BMW 430 tests, 2024.

Other BMW 430 fuel types

• Petrol BMW 430 - 87.6%

All BMW 430 MOT data · Every model