Diesel Fiat Doblo: MOT pass rate

68.7% of diesel Fiat Doblos pass the MOT first time, measured across 36,606 DVSA tests on that fuel type alone. Average mileage at test was 90,967.

Diesel against the other Fiat Doblo 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 Fiat Doblo specifically, petrol is the strongest at 74.2%, and this diesel version sits 0.8 points below the 69.5% model average.

What it means if you are buying one

There is little to choose between fuel types on this model, so decide on running costs and mileage rather than MOT record. 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 Fiat Doblo had covered 90,967 miles at test, against 57,760 for the petrol. That is above average, the point where suspension bushes, drop links and exhaust corrosion start showing up as advisories before they become failures.

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 Fiat Doblo page separate age from fuel if you want to isolate one.

Most common MOT failures on a diesel Fiat Doblo

1. A spring or spring component fractured or seriously weakened, 6.4% of tests (2.8x the national rate for this defect)
2. Engine MIL illuminated indicating a malfunction, 3.3% of tests (2.6x the national rate for this defect)
3. The strength or continuity of the load bearing structure within 30cm of any sub-frame, spring or suspension component mounting (a 'prescribed area') is significantly reduced or inadequately repaired, 2.2% of tests (2.31x the national rate for this defect)
4. Exhaust system leaking or insecure, 2.2% of tests (2.2x the national rate for this defect)
5. A tyre cords visible or damaged, 3.2% of tests (1.92x the national rate for this defect)
6. The aim of a headlamp is not within limits laid down in the requirements, 4% of tests (1.72x the national rate for this defect)
7. A headlamp or light source missing, inoperative or more than ½ not functioning in the case of LED, 2% of tests (1.63x the national rate for this defect)
8. A suspension joint dust cover missing or no longer prevents the ingress of dirt etc, 2.8% of tests (1.52x the national rate for this defect)
9. A suspension pin, bush or joint excessively worn, 7.3% of tests (1.44x the national rate for this defect)
10. Windscreen washers not working or not providing sufficient fluid to clear the windscreen, 2.4% of tests (1.42x the national rate for this defect)

From 36,891 DVSA-tracked diesel Fiat Doblo tests, 2024, split out from the Fiat Doblo's other fuel types. DVSA testers marked 5.06% 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 Fiat Doblo

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

1. A shock absorber bush excessively worn, 2.7% of tests (5.77x the national rate for this defect)
2. Lamp emitted colour, position or intensity not in accordance with the requirements, 3% of tests (2.17x the national rate for this defect)
3. A spring or spring component fractured or seriously weakened, 9.8% of tests (2.07x the national rate for this defect), also fails
4. Fluid leaking excessively and likely to harm the environment or to pose a safety risk to other road users, 9.7% of tests (1.74x the national rate for this defect)
5. Exhaust system leaking or insecure, 4.4% of tests (1.55x the national rate for this defect), also fails
6. Tyre tread depth not in accordance with the requirements, 29.8% of tests
7. A suspension pin, bush or joint excessively worn, 14.5% of tests, also fails
8. A tyre seriously damaged, 12% of tests
9. Brake disc or drum excessively weakened, insecure or fractured, 9.9% of tests
10. A suspension component excessively damaged or corroded, 4.3% of tests

From 36,891 DVSA-tracked diesel Fiat Doblo tests, 2024.

Other Fiat Doblo fuel types

• Petrol Fiat Doblo - 74.2%

All Fiat Doblo MOT data · Every model