Diesel Hyundai I30: MOT pass rate

67.5% of diesel Hyundai I30s pass the MOT first time, measured across 48,313 DVSA tests on that fuel type alone. Average mileage at test was 92,074.

Diesel against the other Hyundai I30 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 Hyundai I30 specifically, petrol is the strongest at 74%, and this diesel version sits 3.5 points below the 71% model average.

What it means if you are buying one

The diesel Hyundai I30 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 Hyundai I30 had covered 92,074 miles at test, against 69,895 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 Hyundai I30 page separate age from fuel if you want to isolate one.

Most common MOT failures on a diesel Hyundai I30

1. Parking brake inoperative on one side, 3.8% of tests (6.35x the national rate for this defect)
2. Parking brake efficiency below minimum requirement, 6.8% of tests (5.19x the national rate for this defect)
3. A steering ball joint with excessive wear or free play, 6.2% of tests (4.73x the national rate for this defect)
4. Lamp emitted colour, position or intensity not in accordance with the requirements, 2.6% of tests (4.33x the national rate for this defect)
5. Stop lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning, 4% of tests (2.91x the national rate for this defect)
6. Significant brake effort recorded with no brake applied indicating a binding brake, 2.7% of tests (2.6x 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, 3.1% of tests (2.49x the national rate for this defect)
8. A suspension pin, bush or joint excessively worn, 8.9% of tests (1.77x the national rate for this defect)
9. a brake lining or pad worn below 1.5mm, 3.5% of tests (1.65x the national rate for this defect)
10. Tyre tread depth not in accordance with the requirements, 5% of tests (1.57x the national rate for this defect)

From 48,516 DVSA-tracked diesel Hyundai I30 tests, 2024, split out from the Hyundai I30's other fuel types. DVSA testers marked 6.32% 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 Hyundai I30

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

1. Lamp emitted colour, position or intensity not in accordance with the requirements, 7.1% of tests (5.15x the national rate for this defect), also fails
2. A steering ball joint with excessive wear or free play, 4.1% of tests (3.1x the national rate for this defect), also fails
3. Significant brake effort recorded with no brake applied indicating a binding brake, 5.7% of tests (2.87x the national rate for this defect), also fails
4. A suspension component excessively damaged or corroded, 11.4% of tests (2.2x the national rate for this defect)
5. Excessive fluctuation in brake effort through each wheel revolution., 1.3% of tests (1.57x the national rate for this defect)
6. A suspension pin, bush or joint excessively worn, 19.9% of tests (1.49x the national rate for this defect), also fails
7. Brake disc or drum excessively weakened, insecure or fractured, 18% of tests (1.47x the national rate for this defect)
8. A spring or spring component fractured or seriously weakened, 6.3% of tests (1.33x the national rate for this defect)
9. Number plate inscription missing or illegible, 3.5% of tests (1.33x the national rate for this defect)
10. Tyre tread depth not in accordance with the requirements, 34.5% of tests (1.3x the national rate for this defect), also fails

From 48,516 DVSA-tracked diesel Hyundai I30 tests, 2024.

Other Hyundai I30 fuel types

• Petrol Hyundai I30 - 74%

All Hyundai I30 MOT data · Every model