Diesel Alfa Romeo Giulia: MOT pass rate

84.4% of diesel Alfa Romeo Giulias pass the MOT first time, measured across 1,665 DVSA tests on that fuel type alone. Average mileage at test was 63,952.

Diesel against the other Alfa Romeo Giulia 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 Alfa Romeo Giulia specifically, petrol is the strongest at 88.5%, and this diesel version sits 3 points below the 87.4% model average.

What it means if you are buying one

The diesel Alfa Romeo Giulia 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 Alfa Romeo Giulia had covered 63,952 miles at test, against 41,295 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 Alfa Romeo Giulia page separate age from fuel if you want to isolate one.

Most common MOT failures on a diesel Alfa Romeo Giulia

1. A tyre cords visible or damaged, 4.6% of tests (2.75x the national rate for this defect)
2. Tyre tread depth not in accordance with the requirements, 6.1% of tests (1.91x the national rate for this defect)
3. The aim of a headlamp is not within limits laid down in the requirements, 3.7% of tests (1.55x the national rate for this defect)
4. Brake disc or drum significantly and obviously worn, 1% of tests (1.28x the national rate for this defect)
5. Engine MIL illuminated indicating a malfunction, 1.5% of tests (1.17x the national rate for this defect)
6. a brake lining or pad worn below 1.5mm, 2.2% of tests
7. A tyre seriously damaged, 1.3% of tests
8. A suspension pin, bush or joint excessively worn, 0.7% of tests
9. Windscreen washers not working or not providing sufficient fluid to clear the windscreen, 0.5% of tests
10. Headlamp levelling device inoperative, 0.5% of tests (3.52x the national rate for this defect)

From 1,671 DVSA-tracked diesel Alfa Romeo Giulia tests, 2024, split out from the Alfa Romeo Giulia's other fuel types. DVSA testers marked 11.1% 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 Alfa Romeo Giulia

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

1. Brake disc or drum excessively weakened, insecure or fractured, 22.1% of tests (1.8x the national rate for this defect)
2. Tyre tread depth not in accordance with the requirements, 41.8% of tests (1.57x the national rate for this defect), also fails
3. a brake lining or pad worn below 1.5mm, 13.6% of tests (1.45x the national rate for this defect), also fails
4. Brake disc or drum significantly and obviously worn, 4% of tests (1.26x the national rate for this defect), also fails
5. A tyre seriously damaged, 3.9% of tests, also fails
6. A suspension pin, bush or joint excessively worn, 3.8% of tests, also fails
7. A shock absorber damaged to the extent that it does not function or showing signs of severe leakage, 2.3% of tests
8. Fluid leaking excessively and likely to harm the environment or to pose a safety risk to other road users, 2% of tests
9. Brake pipe damaged or excessively corroded, 1.1% of tests
10. Number plate inscription missing or illegible, 0.7% of tests

From 1,671 DVSA-tracked diesel Alfa Romeo Giulia tests, 2024.

Other Alfa Romeo Giulia fuel types

• Petrol Alfa Romeo Giulia - 88.5%

All Alfa Romeo Giulia MOT data · Every model