Diesel MG Zt-T: MOT pass rate
60.9% of diesel MG Zt-Ts pass the MOT first time, measured across 368 DVSA tests on that fuel type alone. Average mileage at test was 144,695.
Diesel against the other MG Zt-T versions
| Fuel | Pass rate | Tests |
|---|---|---|
| Petrol | 69.6% | 405 |
| Diesel | 60.9% | 368 |
| All MG Zt-T | 65.6% | 776 |
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 MG Zt-T specifically, petrol is the strongest at 69.6%, and this diesel version sits 4.7 points below the 65.6% model average.
What it means if you are buying one
The diesel MG Zt-T 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. Check the exact car, decode the VIN and check the mileage before you bid.
Mileage is part of the answer
The average diesel MG Zt-T had covered 144,695 miles at test, against 100,513 for the petrol. That is very high mileage. Clutches, dual-mass flywheels and head gaskets have usually been through at least one repair by this point, so ask for evidence rather than assume the car is original everywhere.
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-T page separate age from fuel if you want to isolate one.
Other MG Zt-T fuel types
- Petrol MG Zt-T - 69.6%