Diesel Hyundai I40: MOT pass rate

76.3% of diesel Hyundai I40s pass the MOT first time, measured across 20,865 DVSA tests on that fuel type alone. Average mileage at test was 98,345.

Diesel against the other Hyundai I40 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 I40 specifically, diesel is the strongest at 76.3%, and this diesel version sits 0.1 points above the 76.2% 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 Hyundai I40 had covered 98,345 miles at test, against 80,936 for the petrol. That is above average and into the range where cambelts and water pumps are due if they have not already been done, so ask for the service history rather than take the mileage on trust.

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 I40 page separate age from fuel if you want to isolate one.

Most common MOT failures on a diesel Hyundai I40

1. A tyre pressure monitoring system malfunctioning or obviously inoperative, 1.1% of tests (3.98x the national rate for this defect)
2. A steering ball joint with excessive wear or free play, 4.3% of tests (3.27x the national rate for this defect)
3. a brake lining or pad worn below 1.5mm, 4.8% of tests (2.22x the national rate for this defect)
4. Significant brake effort recorded with no brake applied indicating a binding brake, 2% of tests (1.96x the national rate for this defect)
5. A headlamp or light source missing, inoperative or more than ½ not functioning in the case of LED, 2% of tests (1.67x the national rate for this defect)
6. Brake pipe damaged or excessively corroded, 1.7% of tests (1.63x the national rate for this defect)
7. Tyre tread depth not in accordance with the requirements, 3.6% of tests
8. A suspension pin, bush or joint excessively worn, 3.6% of tests
9. A tyre seriously damaged, 2.7% of tests
10. A tyre cords visible or damaged, 1.9% of tests

From 20,977 DVSA-tracked diesel Hyundai I40 tests, 2024, split out from the Hyundai I40's other fuel types. DVSA testers marked 7.27% 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 I40

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, 4.6% of tests (2.31x the national rate for this defect), also fails
2. Excessive fluctuation in brake effort through each wheel revolution., 1.8% of tests (2.13x the national rate for this defect)
3. A steering ball joint with excessive wear or free play, 2.8% of tests (2.12x the national rate for this defect), also fails
4. a brake lining or pad worn below 1.5mm, 14.6% of tests (1.56x the national rate for this defect), also fails
5. Number plate inscription missing or illegible, 3.6% of tests (1.35x the national rate for this defect)
6. Brake pipe damaged or excessively corroded, 8% of tests (1.29x the national rate for this defect), also fails
7. Tyre tread depth not in accordance with the requirements, 33.6% of tests (1.26x the national rate for this defect), also fails
8. A brake hose ferrule excessively corroded, 1.5% of tests (1.19x the national rate for this defect)
9. Brake disc or drum excessively weakened, insecure or fractured, 12.6% of tests
10. A tyre seriously damaged, 12.6% of tests, also fails

From 20,977 DVSA-tracked diesel Hyundai I40 tests, 2024.

Other Hyundai I40 fuel types

• Petrol Hyundai I40 - 70.4%

All Hyundai I40 MOT data · Every model