Petrol MG Zt: MOT pass rate

73.3% of petrol MG Zts pass the MOT first time, measured across 979 DVSA tests on that fuel type alone. Average mileage at test was 86,603.

Petrol against the other MG Zt versions

Why the fuel type changes the number

Petrol cars avoid the DPF and emissions failures that catch diesels, and usually fail on the same consumables as any other car.

On the MG Zt specifically, petrol is the strongest at 73.3%, and this petrol version sits 2.2 points above the 71.1% model average.

What it means if you are buying one

The petrol MG Zt 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 petrol MG Zt had covered 86,603 miles at test, against 125,547 for the diesel. 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 MG Zt page separate age from fuel if you want to isolate one.

Most common MOT failures on a petrol MG Zt

1. An SRS malfunction indicator lamp (MIL) indicates a system malfunction, 2.7% of tests (6.57x the national rate for this defect)
2. 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, 5.6% of tests (5.88x the national rate for this defect)
3. Brake pipe damaged or excessively corroded, 4.4% of tests (4.16x the national rate for this defect)
4. Parking brake inoperative on one side, 2.1% of tests (3.56x the national rate for this defect)
5. Exhaust system leaking or insecure, 2.2% of tests (2.19x the national rate for this defect)
6. Parking brake efficiency below minimum requirement, 2.8% of tests (2.17x the national rate for this defect)
7. A steering ball joint with excessive wear or free play, 2.7% of tests (2.09x the national rate for this defect)
8. Significant brake effort recorded with no brake applied indicating a binding brake, 2.1% of tests (2.05x the national rate for this defect)
9. A suspension joint dust cover missing or no longer prevents the ingress of dirt etc, 3.7% of tests (2.03x the national rate for this defect)
10. The aim of a headlamp is not within limits laid down in the requirements, 4.3% of tests (1.85x the national rate for this defect)

From 990 DVSA-tracked petrol MG Zt tests, 2024, split out from the MG Zt's other fuel types. DVSA testers marked 2.38% 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 petrol MG Zt

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

1. A suspension component excessively damaged or corroded, 25.6% of tests (4.94x the national rate for this defect)
2. Brake pipe damaged or excessively corroded, 29.8% of tests (4.81x 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, 6.7% of tests (4.39x the national rate for this defect), also fails
4. Vehicle structure corroded to the extent that the rigidity of the assembly is seriously reduced, 5.4% of tests (4.3x the national rate for this defect)
5. Product on the lens or light source which obviously reduces light intensity or changes emitted colour to other than white or yellow, 3.1% of tests (2.83x the national rate for this defect)
6. Excessive fluctuation in brake effort through each wheel revolution., 2.2% of tests (2.62x the national rate for this defect)
7. A steering ball joint with excessive wear or free play, 2.3% of tests (1.74x the national rate for this defect), also fails
8. A spring or spring component fractured or seriously weakened, 8.1% of tests (1.71x the national rate for this defect)
9. Exhaust system leaking or insecure, 4.8% of tests (1.7x the national rate for this defect), also fails
10. Brake disc or drum excessively weakened, insecure or fractured, 18.3% of tests (1.49x the national rate for this defect)

From 990 DVSA-tracked petrol MG Zt tests, 2024.

Other MG Zt fuel types

• Diesel MG Zt - 66%

All MG Zt MOT data · Every model