Diesel Infiniti Q30: MOT pass rate
84.6% of diesel Infiniti Q30s pass the MOT first time, measured across 3,897 DVSA tests on that fuel type alone. Average mileage at test was 63,258.
Diesel against the other Infiniti Q30 versions
| Fuel | Pass rate | Tests |
|---|---|---|
| Diesel | 84.6% | 3,897 |
| Petrol | 89.5% | 982 |
| All Infiniti Q30 | 85.6% | 4,879 |
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 Q30 specifically, petrol is the strongest at 89.5%, and this diesel version sits 1 points below the 85.6% model average.
What it means if you are buying one
The diesel Infiniti Q30 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 Q30 had covered 63,258 miles at test, against 45,718 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 Infiniti Q30 page separate age from fuel if you want to isolate one.
Most common MOT failures on a diesel Infiniti Q30
- An SRS malfunction indicator lamp (MIL) indicates a system malfunction, 0.7% of tests (1.79x the national rate for this defect)
- A headlamp or light source missing, inoperative or more than ½ not functioning in the case of LED, 2.1% of tests (1.73x the national rate for this defect)
- A suspension joint dust cover missing or no longer prevents the ingress of dirt etc, 2.7% of tests (1.48x the national rate for this defect)
- Brake disc or drum significantly and obviously worn, 1.1% of tests (1.42x the national rate for this defect)
- A spring or spring component fractured or seriously weakened, 2.7% of tests (1.18x the national rate for this defect)
- Tyre tread depth not in accordance with the requirements, 3.2% of tests
- a brake lining or pad worn below 1.5mm, 2.1% of tests
- A tyre seriously damaged, 1.9% of tests
- Engine MIL illuminated indicating a malfunction, 1.2% of tests
- Windscreen washers not working or not providing sufficient fluid to clear the windscreen, 1% of tests
From 3,904 DVSA-tracked diesel Infiniti Q30 tests, 2024, split out from the Infiniti Q30's other fuel types. DVSA testers marked 6.21% 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 Q30
Flagged but doesn't fail the car, a different list from the failures above.
- Brake disc or drum significantly and obviously worn, 5.9% of tests (1.85x the national rate for this defect), also fails
- A tyre seriously damaged, 24.4% of tests (1.58x the national rate for this defect), also fails
- Tyre tread depth not in accordance with the requirements, 25.4% of tests, also fails
- Brake disc or drum excessively weakened, insecure or fractured, 13.6% of tests
- a brake lining or pad worn below 1.5mm, 10% of tests, also fails
- A suspension pin, bush or joint excessively worn, 2.7% of tests
- Number plate inscription missing or illegible, 1.2% of tests
- Brake pipe damaged or excessively corroded, 1% of tests
- Excessive fluctuation in brake effort through each wheel revolution., 0.9% of tests
- A spring or spring component fractured or seriously weakened, 0.8% of tests, also fails
From 3,904 DVSA-tracked diesel Infiniti Q30 tests, 2024.
Other Infiniti Q30 fuel types
- Petrol Infiniti Q30 - 89.5%