Diesel Kia Stonic: MOT pass rate

86.4% of diesel Kia Stonics pass the MOT first time, measured across 2,320 DVSA tests on that fuel type alone. Average mileage at test was 50,472.

Diesel against the other Kia Stonic 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 Kia Stonic specifically, petrol is the strongest at 90.6%, and this diesel version sits 3.7 points below the 90.1% model average.

What it means if you are buying one

The diesel Kia Stonic 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 Kia Stonic had covered 50,472 miles at test, against 33,789 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 Kia Stonic page separate age from fuel if you want to isolate one.

Most common MOT failures on a diesel Kia Stonic

1. a brake lining or pad worn below 1.5mm, 4% of tests (1.88x the national rate for this defect)
2. A headlamp or light source missing, inoperative or more than ½ not functioning in the case of LED, 2.2% of tests (1.82x the national rate for this defect)
3. Tyre tread depth not in accordance with the requirements, 3.4% of tests
4. Wiper blade missing or obviously not clearing the windscreen, 1.8% of tests
5. A tyre seriously damaged, 1.4% of tests
6. Engine MIL illuminated indicating a malfunction, 0.9% of tests
7. Brake disc or drum significantly and obviously worn, 0.8% of tests
8. Windscreen washers not working or not providing sufficient fluid to clear the windscreen, 0.7% of tests
9. A tyre cords visible or damaged, 0.6% of tests
10. Brakes imbalance across an axle such that the braking effort from any wheel is less than 70% of the maximum effort recorded from the other wheel on the same axle., 0.5% of tests

From 2,328 DVSA-tracked diesel Kia Stonic tests, 2024, split out from the Kia Stonic's other fuel types. DVSA testers marked 7.78% 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 Kia Stonic

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

1. Brake disc or drum significantly and obviously worn, 6.1% of tests (1.93x the national rate for this defect), also fails
2. a brake lining or pad worn below 1.5mm, 16.3% of tests (1.75x the national rate for this defect), also fails
3. Significant brake effort recorded with no brake applied indicating a binding brake, 2.7% of tests (1.35x the national rate for this defect)
4. Brake disc or drum excessively weakened, insecure or fractured, 15.1% of tests (1.23x the national rate for this defect)
5. Tyre tread depth not in accordance with the requirements, 31.4% of tests (1.18x the national rate for this defect), also fails
6. A tyre seriously damaged, 9.1% of tests, also fails
7. Fluid leaking excessively and likely to harm the environment or to pose a safety risk to other road users, 2.2% of tests
8. A suspension pin, bush or joint excessively worn, 1.6% of tests
9. A steering ball joint with excessive wear or free play, 1% of tests
10. Excessive fluctuation in brake effort through each wheel revolution., 0.8% of tests

From 2,328 DVSA-tracked diesel Kia Stonic tests, 2024.

Other Kia Stonic fuel types

• Petrol Kia Stonic - 90.6%

All Kia Stonic MOT data · Every model