Diesel Mazda Cx-7: MOT pass rate

63.1% of diesel Mazda Cx-7s pass the MOT first time, measured across 955 DVSA tests on that fuel type alone. Average mileage at test was 106,259.

Diesel against the other Mazda Cx-7 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 Mazda Cx-7 specifically, petrol is the strongest at 64.4%, and this diesel version sits 0.4 points below the 63.5% 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 Mazda Cx-7 had covered 106,259 miles at test, against 101,561 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 Mazda Cx-7 page separate age from fuel if you want to isolate one.

Most common MOT failures on a diesel Mazda Cx-7

1. A steering ball joint with excessive wear or free play, 10.1% of tests (7.75x the national rate for this defect)
2. Parking brake efficiency less than 50% of the required value, 2.8% of tests (7.67x the national rate for this defect)
3. Parking brake efficiency below minimum requirement, 6.9% of tests (5.28x the national rate for this defect)
4. Parking brake inoperative on one side, 3.1% of tests (5.24x the national rate for this defect)
5. A lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning, 8.8% of tests (3.93x the national rate for this defect)
6. The strength or continuity of the load bearing structure within 30cm of any sub-frame, spring or suspension component mounting (a 'prescribed area') is significantly reduced or inadequately repaired, 2.8% of tests (2.98x the national rate for this defect)
7. Significant brake effort recorded with no brake applied indicating a binding brake, 2.9% of tests (2.81x the national rate for this defect)
8. The aim of a headlamp is not within limits laid down in the requirements, 6.6% of tests (2.79x the national rate for this defect)
9. A suspension joint dust cover missing or no longer prevents the ingress of dirt etc, 4.1% of tests (2.21x the national rate for this defect)
10. Engine MIL illuminated indicating a malfunction, 2.5% of tests (1.96x the national rate for this defect)

From 960 DVSA-tracked diesel Mazda Cx-7 tests, 2024, split out from the Mazda Cx-7's other fuel types. DVSA testers marked 5.77% 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 Mazda Cx-7

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

1. A suspension component excessively damaged or corroded, 42.7% of tests (8.25x the national rate for this defect)
2. Parking brake efficiency below minimum requirement, 1.8% of tests (7.03x the national rate for this defect), also fails
3. The strength or continuity of the load bearing structure within 30cm of any sub-frame, spring or suspension component mounting (a 'prescribed area') is significantly reduced or inadequately repaired, 9.2% of tests (6.04x the national rate for this defect), also fails
4. Product on the lens or light source which obviously reduces light intensity or changes emitted colour to other than white or yellow, 5.8% of tests (5.27x the national rate for this defect)
5. A steering ball joint with excessive wear or free play, 6.3% of tests (4.69x the national rate for this defect), also fails
6. Vehicle structure corroded to the extent that the rigidity of the assembly is seriously reduced, 5.8% of tests (4.69x the national rate for this defect)
7. A suspension pin, bush or joint excessively worn, 27.9% of tests (2.09x the national rate for this defect)
8. Fluid leaking excessively and likely to harm the environment or to pose a safety risk to other road users, 10.4% of tests (1.87x the national rate for this defect)
9. A brake hose ferrule excessively corroded, 2.3% of tests (1.8x the national rate for this defect)
10. Significant brake effort recorded with no brake applied indicating a binding brake, 3.2% of tests (1.62x the national rate for this defect), also fails

From 960 DVSA-tracked diesel Mazda Cx-7 tests, 2024.

Other Mazda Cx-7 fuel types

• Petrol Mazda Cx-7 - 64.4%

All Mazda Cx-7 MOT data · Every model