Diesel Jeep Wrangler: MOT pass rate

78.6% of diesel Jeep Wranglers pass the MOT first time, measured across 1,914 DVSA tests on that fuel type alone. Average mileage at test was 55,998.

Diesel against the other Jeep Wrangler 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 Jeep Wrangler specifically, petrol is the strongest at 87%, and this diesel version sits 4.8 points below the 83.4% model average.

What it means if you are buying one

The diesel Jeep Wrangler 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 Jeep Wrangler had covered 55,998 miles at test, against 47,155 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 Jeep Wrangler page separate age from fuel if you want to isolate one.

Most common MOT failures on a diesel Jeep Wrangler

1. A direction indicator lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning, 3.8% of tests (5.73x the national rate for this defect)
2. An obligatory rear fog lamp missing, or a front or rear fog lamp inoperative or in the case of a multiple light source more than 1/2 not functioning, 2% of tests (4.62x the national rate for this defect)
3. The aim of a headlamp is not within limits laid down in the requirements, 5.6% of tests (2.39x the national rate for this defect)
4. Significant brake effort recorded with no brake applied indicating a binding brake, 2.1% of tests (2.01x the national rate for this defect)
5. Engine MIL illuminated indicating a malfunction, 2.5% of tests (1.96x the national rate for this defect)
6. Parking brake inoperative on one side, 1% of tests (1.66x the national rate for this defect)
7. Parking brake efficiency below minimum requirement, 2.1% of tests (1.64x the national rate for this defect)
8. Stop lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning, 1.8% of tests (1.3x the national rate for this defect)
9. a brake lining or pad worn below 1.5mm, 2.8% of tests (1.29x the national rate for this defect)
10. A lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning, 2.7% of tests (1.22x the national rate for this defect)

From 1,919 DVSA-tracked diesel Jeep Wrangler tests, 2024, split out from the Jeep Wrangler's other fuel types. DVSA testers marked 3.91% 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 Jeep Wrangler

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

1. A transmission joint, belt or chain excessively worn, 1.5% of tests (18.96x the national rate for this defect)
2. A wheel bearing with excessive play, 2.8% of tests (4.26x the national rate for this defect)
3. A shock absorber bush excessively worn, 1.1% of tests (2.4x the national rate for this defect)
4. Significant brake effort recorded with no brake applied indicating a binding brake, 2.9% of tests (1.43x the national rate for this defect), also fails
5. Brake disc or drum excessively weakened, insecure or fractured, 16.7% of tests (1.37x the national rate for this defect)
6. A steering ball joint with excessive wear or free play, 1.8% of tests (1.33x the national rate for this defect)
7. a brake lining or pad worn below 1.5mm, 10.9% of tests (1.17x the national rate for this defect), also fails
8. Tyre tread depth not in accordance with the requirements, 10.3% of tests
9. A tyre seriously damaged, 10.1% of tests
10. A suspension pin, bush or joint excessively worn, 7.7% of tests

From 1,919 DVSA-tracked diesel Jeep Wrangler tests, 2024.

Other Jeep Wrangler fuel types

• Petrol Jeep Wrangler - 87%

All Jeep Wrangler MOT data · Every model