Diesel MG 6: MOT pass rate

69.7% of diesel MG 6s pass the MOT first time, measured across 874 DVSA tests on that fuel type alone. Average mileage at test was 70,976.

Diesel against the other MG 6 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 MG 6 specifically, diesel is the strongest at 69.7%, and this diesel version sits 2 points above the 67.7% model average.

What it means if you are buying one

The diesel MG 6 is the stronger side of this model on MOT data. Still judge the individual car, but the fuel type is a mild point in its favour. 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 MG 6 had covered 70,976 miles at test, against 72,318 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 MG 6 page separate age from fuel if you want to isolate one.

Most common MOT failures on a diesel MG 6

1. A wheel with a loose or missing wheel nut, bolt or stud, 3.6% of tests (11.77x the national rate for this defect)
2. ESC MIL indicates a system malfunction, 2% of tests (10.11x the national rate for this defect)
3. Brake pipe damaged or excessively corroded, 6.5% of tests (6.06x the national rate for this defect)
4. A headlamp or light source missing, inoperative or more than ½ not functioning in the case of LED, 4.4% of tests (3.62x the national rate for this defect)
5. A direction indicator lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning, 1.7% of tests (2.6x the national rate for this defect)
6. a brake lining or pad worn below 1.5mm, 5.2% of tests (2.43x the national rate for this defect)
7. The aim of a headlamp is not within limits laid down in the requirements, 4.9% of tests (2.08x the national rate for this defect)
8. Engine MIL illuminated indicating a malfunction, 2.5% of tests (1.96x the national rate for this defect)
9. Tyre tread depth not in accordance with the requirements, 5.9% of tests (1.85x the national rate for this defect)
10. Parking brake efficiency below minimum requirement, 2.4% of tests (1.83x the national rate for this defect)

From 880 DVSA-tracked diesel MG 6 tests, 2024, split out from the MG 6's other fuel types. DVSA testers marked 6.81% 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 MG 6

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

1. Brake pipe damaged or excessively corroded, 25.5% of tests (4.11x the national rate for this defect), also fails
2. A spring or spring component fractured or seriously weakened, 15.9% of tests (3.37x the national rate for this defect)
3. A suspension component excessively damaged or corroded, 13.4% of tests (2.59x the national rate for this defect)
4. a brake lining or pad worn below 1.5mm, 17.4% of tests (1.86x the national rate for this defect), also fails
5. Brake disc or drum excessively weakened, insecure or fractured, 22.6% of tests (1.85x the national rate for this defect)
6. Tyre tread depth not in accordance with the requirements, 41.9% of tests (1.57x the national rate for this defect), also fails
7. Fluid leaking excessively and likely to harm the environment or to pose a safety risk to other road users, 7.5% of tests (1.35x the national rate for this defect)
8. Number plate inscription missing or illegible, 3.1% of tests (1.16x the national rate for this defect)
9. A tyre seriously damaged, 10.9% of tests
10. A suspension pin, bush or joint excessively worn, 10.1% of tests

From 880 DVSA-tracked diesel MG 6 tests, 2024.

Other MG 6 fuel types

• Petrol MG 6 - 66.1%

All MG 6 MOT data · Every model