Diesel Ford Grand C-Max: MOT pass rate

73.1% of diesel Ford Grand C-Max pass the MOT first time, measured across 26,385 DVSA tests on that fuel type alone. Average mileage at test was 86,364.

Diesel against the other Ford Grand C-Max 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 Ford Grand C-Max specifically, petrol is the strongest at 77.2%, and this diesel version sits 1.1 points below the 74.2% model average.

What it means if you are buying one

The diesel Ford Grand C-Max 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 Ford Grand C-Max had covered 86,364 miles at test, against 67,321 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 Ford Grand C-Max page separate age from fuel if you want to isolate one.

Most common MOT failures on a diesel Ford Grand C-Max

1. A tyre pressure monitoring system malfunctioning or obviously inoperative, 1.6% of tests (5.92x the national rate for this defect)
2. Smoke opacity levels exceed the manufacturer's specified limit, 1.3% of tests (4.75x the national rate for this defect)
3. A transmission shaft constant velocity joint boot missing or no longer prevents the ingress of dirt etc, 4.6% of tests (3.04x the national rate for this defect)
4. A tyre cords visible or damaged, 4.5% of tests (2.67x the national rate for this defect)
5. a brake lining or pad worn below 1.5mm, 5.4% of tests (2.52x 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, 2.9% of tests (2.1x the national rate for this defect)
7. Lamp emitted colour, position or intensity not in accordance with the requirements, 1% of tests (1.74x the national rate for this defect)
8. Tyre tread depth not in accordance with the requirements, 5% of tests (1.57x the national rate for this defect)
9. A tyre seriously damaged, 3.6% of tests (1.29x the national rate for this defect)
10. A suspension pin, bush or joint excessively worn, 5.2% of tests

From 26,505 DVSA-tracked diesel Ford Grand C-Max tests, 2024, split out from the Ford Grand C-Max's other fuel types. DVSA testers marked 7.54% 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 Ford Grand C-Max

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, 2.9% of tests (2.09x the national rate for this defect), also fails
2. A stub axle swivel pin and/or bush excessively worn, 1.3% of tests (2.06x the national rate for this defect)
3. a brake lining or pad worn below 1.5mm, 18.6% of tests (1.99x the national rate for this defect), also fails
4. Tyre tread depth not in accordance with the requirements, 46.1% of tests (1.73x the national rate for this defect), also fails
5. A suspension pin, bush or joint excessively worn, 22.8% of tests (1.7x the national rate for this defect), also fails
6. Number plate inscription missing or illegible, 4.1% of tests (1.55x the national rate for this defect)
7. Brake disc or drum significantly and obviously worn, 4.4% of tests (1.37x the national rate for this defect)
8. Brake disc or drum excessively weakened, insecure or fractured, 14.5% of tests (1.19x the national rate for this defect)
9. A tyre seriously damaged, 14.4% of tests, also fails
10. A suspension component excessively damaged or corroded, 4.4% of tests

From 26,505 DVSA-tracked diesel Ford Grand C-Max tests, 2024.

Other Ford Grand C-Max fuel types

• Petrol Ford Grand C-Max - 77.2%

All Ford Grand C-Max MOT data · Every model