Diesel MINI Cooper S: MOT pass rate

85.7% of diesel MINI Cooper S pass the MOT first time, measured across 7,872 DVSA tests on that fuel type alone. Average mileage at test was 66,731.

Diesel against the other MINI Cooper S 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 MINI Cooper S specifically, hybrid is the strongest at 89.3%, and this diesel version sits 2.8 points below the 88.5% model average.

What it means if you are buying one

The diesel MINI Cooper S 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. 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 MINI Cooper S had covered 66,731 miles at test, against 40,110 for the petrol and 33,174 for the hybrid. 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 MINI Cooper S page separate age from fuel if you want to isolate one.

Most common MOT failures on a diesel MINI Cooper S

1. 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, 0.5% of tests (2.69x the national rate for this defect)
2. Engine MIL illuminated indicating a malfunction, 1.8% of tests (1.4x the national rate for this defect)
3. A tyre seriously damaged, 3.3% of tests (1.17x the national rate for this defect)
4. Tyre tread depth not in accordance with the requirements, 1.9% of tests
5. A lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning, 1.7% of tests
6. Wiper blade missing or obviously not clearing the windscreen, 1.6% of tests
7. a brake lining or pad worn below 1.5mm, 1.2% of tests
8. A tyre cords visible or damaged, 1.1% of tests
9. Windscreen washers not working or not providing sufficient fluid to clear the windscreen, 1% of tests
10. A suspension pin, bush or joint excessively worn, 0.7% of tests

From 7,875 DVSA-tracked diesel MINI Cooper S tests, 2024, split out from the MINI Cooper S's other fuel types. DVSA testers marked 6.31% 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 MINI Cooper S

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

1. A wheel badly distorted or wear between wheel and hub at spigot mounting, 3.6% of tests (3.39x the national rate for this defect)
2. Tyre tread depth not in accordance with the requirements, 24.3% of tests, also fails
3. A tyre seriously damaged, 16.2% of tests, also fails
4. Brake disc or drum excessively weakened, insecure or fractured, 11% of tests
5. a brake lining or pad worn below 1.5mm, 6.3% of tests, also fails
6. A suspension pin, bush or joint excessively worn, 6.1% of tests, also fails
7. Brake disc or drum significantly and obviously worn, 2.9% of tests
8. A spring or spring component fractured or seriously weakened, 2.3% of tests
9. A shock absorber damaged to the extent that it does not function or showing signs of severe leakage, 1.4% of tests
10. Number plate inscription missing or illegible, 1.4% of tests

From 7,875 DVSA-tracked diesel MINI Cooper S tests, 2024.

Other MINI Cooper S fuel types

• Petrol MINI Cooper S - 88.7%
• Hybrid MINI Cooper S - 89.3%

All MINI Cooper S MOT data · Every model