Diesel Porsche Cayenne: MOT pass rate

86.1% of diesel Porsche Cayennes pass the MOT first time, measured across 12,473 DVSA tests on that fuel type alone. Average mileage at test was 89,592.

Diesel against the other Porsche Cayenne 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 Porsche Cayenne specifically, hybrid is the strongest at 91.4%, and this diesel version sits 1 points below the 87.1% model average.

What it means if you are buying one

The diesel Porsche Cayenne 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 Porsche Cayenne had covered 89,592 miles at test, against 78,599 for the petrol and 48,878 for the hybrid. 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 Porsche Cayenne page separate age from fuel if you want to isolate one.

Most common MOT failures on a diesel Porsche Cayenne

1. Number plate does not conform to the specified requirements, 0.9% of tests (4.62x the national rate for this defect)
2. A wheel with a loose or missing wheel nut, bolt or stud, 0.8% of tests (2.43x the national rate for this defect)
3. A spring or spring component fractured or seriously weakened, 4.7% of tests (2.07x the national rate for this defect)
4. Tyre tread depth not in accordance with the requirements, 2.9% of tests
5. A tyre seriously damaged, 2.7% of tests
6. a brake lining or pad worn below 1.5mm, 1.4% of tests
7. A tyre cords visible or damaged, 1.3% of tests
8. Engine MIL illuminated indicating a malfunction, 1.1% of tests
9. The aim of a headlamp is not within limits laid down in the requirements, 0.9% of tests
10. Windscreen washers not working or not providing sufficient fluid to clear the windscreen, 0.9% of tests

From 12,533 DVSA-tracked diesel Porsche Cayenne tests, 2024, split out from the Porsche Cayenne's other fuel types. DVSA testers marked 6.05% 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 Porsche Cayenne

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

1. a brake lining or pad worn below 1.5mm, 17% of tests (1.82x the national rate for this defect), also fails
2. Brake disc or drum significantly and obviously worn, 4.5% of tests (1.42x the national rate for this defect)
3. Tyre tread depth not in accordance with the requirements, 27.9% of tests, also fails
4. A tyre seriously damaged, 8.8% of tests, also fails
5. Brake disc or drum excessively weakened, insecure or fractured, 5.8% of tests
6. Fluid leaking excessively and likely to harm the environment or to pose a safety risk to other road users, 5.5% of tests
7. A suspension pin, bush or joint excessively worn, 4.6% of tests
8. Brake pipe damaged or excessively corroded, 1.8% of tests
9. A shock absorber damaged to the extent that it does not function or showing signs of severe leakage, 1.5% of tests
10. A suspension component excessively damaged or corroded, 1.4% of tests

From 12,533 DVSA-tracked diesel Porsche Cayenne tests, 2024.

Other Porsche Cayenne fuel types

• Petrol Porsche Cayenne - 86.8%
• Hybrid Porsche Cayenne - 91.4%

All Porsche Cayenne MOT data · Every model