Diesel Audi Tt: MOT pass rate
80.9% of diesel Audi Tts pass the MOT first time, measured across 19,118 DVSA tests on that fuel type alone. Average mileage at test was 90,923.
Diesel against the other Audi Tt versions
| Fuel | Pass rate | Tests |
|---|---|---|
| Petrol | 79% | 93,907 |
| Diesel | 80.9% | 19,118 |
| All Audi Tt | 79.3% | 113,032 |
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 Audi Tt specifically, diesel is the strongest at 80.9%, and this diesel version sits 1.6 points above the 79.3% model average.
What it means if you are buying one
The diesel Audi Tt 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. Check the exact car, decode the VIN and check the mileage before you bid.
Mileage is part of the answer
The average diesel Audi Tt had covered 90,923 miles at test, against 79,059 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 Audi Tt page separate age from fuel if you want to isolate one.
Other Audi Tt fuel types
- Petrol Audi Tt - 79%