Diesel Peugeot 308: MOT pass rate

68.5% of diesel Peugeot 308s pass the MOT first time, measured across 87,942 DVSA tests on that fuel type alone. Average mileage at test was 94,532.

Diesel against the other Peugeot 308 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 Peugeot 308 specifically, petrol is the strongest at 74.5%, and this diesel version sits 2 points below the 70.5% model average.

What it means if you are buying one

The diesel Peugeot 308 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 Peugeot 308 had covered 94,532 miles at test, against 62,078 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 Peugeot 308 page separate age from fuel if you want to isolate one.

Most common MOT failures on a diesel Peugeot 308

1. A transmission shaft constant velocity joint boot missing or no longer prevents the ingress of dirt etc, 5.3% of tests (3.48x the national rate for this defect)
2. A steering ball joint with excessive wear or free play, 3.5% of tests (2.69x the national rate for this defect)
3. A rear registration plate lamp or light source missing or inoperative in the case of a single lamp or all lamps, 2.2% of tests (2.49x the national rate for this defect)
4. A spring or spring component fractured or seriously weakened, 5.2% of tests (2.3x the national rate for this defect)
5. Significant brake effort recorded with no brake applied indicating a binding brake, 1.9% of tests (1.82x the national rate for this defect)
6. Stop lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning, 2.5% of tests (1.81x the national rate for this defect)
7. The aim of a headlamp is not within limits laid down in the requirements, 4.1% of tests (1.76x the national rate for this defect)
8. a brake lining or pad worn below 1.5mm, 3.8% of tests (1.75x the national rate for this defect)
9. Tyre tread depth not in accordance with the requirements, 5.2% of tests (1.62x the national rate for this defect)
10. A headlamp or light source missing, inoperative or more than ½ not functioning in the case of LED, 1.9% of tests (1.59x the national rate for this defect)

From 88,306 DVSA-tracked diesel Peugeot 308 tests, 2024, split out from the Peugeot 308's other fuel types. DVSA testers marked 6.08% 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 Peugeot 308

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

1. Significant brake effort recorded with no brake applied indicating a binding brake, 5% of tests (2.5x the national rate for this defect), also fails
2. Brake disc or drum excessively weakened, insecure or fractured, 20.8% of tests (1.7x the national rate for this defect)
3. Brake disc or drum significantly and obviously worn, 5.1% of tests (1.59x the national rate for this defect)
4. A brake hose ferrule excessively corroded, 1.9% of tests (1.52x the national rate for this defect)
5. A steering ball joint with excessive wear or free play, 2% of tests (1.49x the national rate for this defect), also fails
6. A suspension pin, bush or joint excessively worn, 18.9% of tests (1.42x the national rate for this defect)
7. Tyre tread depth not in accordance with the requirements, 37.4% of tests (1.4x the national rate for this defect), also fails
8. a brake lining or pad worn below 1.5mm, 12.4% of tests (1.33x the national rate for this defect), also fails
9. Product on the lens or light source which obviously reduces light intensity or changes emitted colour to other than white or yellow, 1.5% of tests (1.32x the national rate for this defect)
10. Fluid leaking excessively and likely to harm the environment or to pose a safety risk to other road users, 7.1% of tests (1.28x the national rate for this defect)

From 88,306 DVSA-tracked diesel Peugeot 308 tests, 2024.

Other Peugeot 308 fuel types

• Petrol Peugeot 308 - 74.5%

All Peugeot 308 MOT data · Every model