Diesel Jaguar Xj: MOT pass rate

81.6% of diesel Jaguar Xjs pass the MOT first time, measured across 12,010 DVSA tests on that fuel type alone. Average mileage at test was 88,202.

Diesel against the other Jaguar Xj 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 Jaguar Xj specifically, diesel is the strongest at 81.6%, and this diesel version sits 2.5 points above the 79.1% model average.

What it means if you are buying one

The diesel Jaguar Xj is the stronger side of this model on MOT data. Still judge the individual car, but the fuel type is a mild point in its favour. 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 Jaguar Xj had covered 88,202 miles at test, against 96,694 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 Jaguar Xj page separate age from fuel if you want to isolate one.

Most common MOT failures on a diesel Jaguar Xj

1. A suspension joint dust cover missing or no longer prevents the ingress of dirt etc, 4.8% of tests (2.62x the national rate for this defect)
2. Steering rack gaiter or ball joint dust cover missing or no longer prevents the ingress of dirt etc, 1.5% of tests (2.02x the national rate for this defect)
3. A tyre cords visible or damaged, 2.7% of tests (1.61x the national rate for this defect)
4. A rear registration plate lamp or light source missing or inoperative in the case of a single lamp or all lamps, 1.1% of tests (1.19x the national rate for this defect)
5. A suspension pin, bush or joint excessively worn, 4.7% of tests
6. Tyre tread depth not in accordance with the requirements, 3% of tests
7. A tyre seriously damaged, 2.3% of tests
8. A spring or spring component fractured or seriously weakened, 2.2% of tests
9. Windscreen washers not working or not providing sufficient fluid to clear the windscreen, 1.8% of tests
10. a brake lining or pad worn below 1.5mm, 1.2% of tests

From 12,092 DVSA-tracked diesel Jaguar Xj tests, 2024, split out from the Jaguar Xj's other fuel types. DVSA testers marked 5.97% 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 Jaguar Xj

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

1. A brake hose ferrule excessively corroded, 3.6% of tests (2.83x the national rate for this defect)
2. A shock absorber bush excessively worn, 1.2% of tests (2.58x the national rate for this defect)
3. Excessive fluctuation in brake effort through each wheel revolution., 1.3% of tests (1.5x the national rate for this defect)
4. A suspension component excessively damaged or corroded, 7.7% of tests (1.48x the national rate for this defect)
5. A wheel badly distorted or wear between wheel and hub at spigot mounting, 1.6% of tests (1.46x the national rate for this defect)
6. A suspension pin, bush or joint excessively worn, 17.7% of tests (1.33x the national rate for this defect), also fails
7. Tyre tread depth not in accordance with the requirements, 31.9% of tests (1.2x the national rate for this defect), also fails
8. A tyre seriously damaged, 12% of tests, also fails
9. Brake disc or drum excessively weakened, insecure or fractured, 9.1% of tests
10. a brake lining or pad worn below 1.5mm, 7.6% of tests, also fails

From 12,092 DVSA-tracked diesel Jaguar Xj tests, 2024.

Other Jaguar Xj fuel types

• Petrol Jaguar Xj - 76.5%

All Jaguar Xj MOT data · Every model