Diesel Infiniti Q50: MOT pass rate

79.7% of diesel Infiniti Q50s pass the MOT first time, measured across 2,110 DVSA tests on that fuel type alone. Average mileage at test was 78,390.

Diesel against the other Infiniti Q50 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 Infiniti Q50 specifically, petrol is the strongest at 86.3%, and this diesel version sits 1.1 points below the 80.8% model average.

What it means if you are buying one

The diesel Infiniti Q50 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 Infiniti Q50 had covered 78,390 miles at test, against 67,324 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 Infiniti Q50 page separate age from fuel if you want to isolate one.

Most common MOT failures on a diesel Infiniti Q50

1. A wheel with a loose or missing wheel nut, bolt or stud, 1.3% of tests (4.12x the national rate for this defect)
2. Parking brake lever has excessive movement indicating incorrect adjustment, 0.8% of tests (3.71x the national rate for this defect)
3. a brake lining or pad worn below 1.5mm, 5.9% of tests (2.77x the national rate for this defect)
4. Warning device shows system malfunction, 0.8% of tests (1.82x the national rate for this defect)
5. A tyre cords visible or damaged, 2.4% of tests (1.43x the national rate for this defect)
6. A suspension pin, bush or joint excessively worn, 7% of tests (1.4x the national rate for this defect)
7. Tyre tread depth not in accordance with the requirements, 4.4% of tests (1.37x the national rate for this defect)
8. A tyre seriously damaged, 1.8% of tests
9. Wiper blade missing or obviously not clearing the windscreen, 1.5% of tests
10. A lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning, 1.2% of tests

From 2,120 DVSA-tracked diesel Infiniti Q50 tests, 2024, split out from the Infiniti Q50's other fuel types. DVSA testers marked 8.24% 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 Infiniti Q50

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

1. Parking brake efficiency below minimum requirement, 0.8% of tests (3x the national rate for this defect)
2. A suspension pin, bush or joint excessively worn, 34.9% of tests (2.61x the national rate for this defect), also fails
3. a brake lining or pad worn below 1.5mm, 21.7% of tests (2.32x the national rate for this defect), also fails
4. A wheel bearing with excessive play, 1.4% of tests (2.18x the national rate for this defect)
5. Excessive fluctuation in brake effort through each wheel revolution., 1.6% of tests (1.89x the national rate for this defect)
6. Tyre tread depth not in accordance with the requirements, 37.1% of tests (1.39x the national rate for this defect), also fails
7. Brake disc or drum excessively weakened, insecure or fractured, 14.3% of tests (1.17x the national rate for this defect)
8. Brake disc or drum significantly and obviously worn, 3.7% of tests (1.17x the national rate for this defect)
9. A tyre seriously damaged, 6.6% of tests, also fails
10. A suspension component excessively damaged or corroded, 3.8% of tests

From 2,120 DVSA-tracked diesel Infiniti Q50 tests, 2024.

Other Infiniti Q50 fuel types

• Petrol Infiniti Q50 - 86.3%

All Infiniti Q50 MOT data · Every model