Audi A3 e sport tdi vs Audi A4: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Audi A3 e sport tdi
81%
MOT pass rate · 364 vehicles
More reliable
Audi A4
76%
MOT pass rate · 568,515 vehicles
Verdict: On MOT pass rate, the Audi A3 e sport tdi is the more reliable of the two — 81% pass first time versus 76%. It's one signal among several; check the full breakdown below.
Head to head
| Measure | Audi A3 e sport tdi | Audi A4 |
|---|---|---|
| MOT pass rate | 81% ✓ | 76% |
| MOT failure rate | 19% ✓ | 24% |
| Faults & advisories per test | 0.0 ✓ | 1.9 |
| Dangerous-fault share | 0% ✓ | 2% |
| Average mileage | 165,631 mi | 133,841 mi |
| Sample size (vehicles) | 364 | 568,515 |
Most common faults
Audi A3 e sport tdi
- Oil leak, but not excessive (8.4.1 (a) (i))
- Nearside Front Shock absorbers has light misting of oil (5.3.2 (b))
- Nearside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
- Engine MIL inoperative or indicates a malfunction (8.2.1.2 (h))
- Nearside Front Shock absorber has a light misting of oil (2.7.3)
- Rear brake disc worn, pitted or scored, but not seriously weakened offside/nearside (3.5.1i)
Audi A4
- Nearside Front Tyre worn close to the legal limit (4.1.E.1)
- Offside Front Tyre worn close to the legal limit (4.1.E.1)
- Nearside Rear Tyre worn close to the legal limit (4.1.E.1)
- Offside Rear Tyre worn close to the legal limit (4.1.E.1)
- Under-trays fitted obscuring some underside components
- Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
Reliability FAQ
On MOT pass rate, the Audi A3 e sport tdi is the more reliable of the two — 81% pass first time versus 76%. It's one signal among several; check the full breakdown below.
Full Audi A3 e sport tdi report Full Audi A4 report Most reliable cars
Pass rates are computed over completed (pass/fail) MOT tests. Reliability also depends on age, mileage and upkeep — see each model's page for the full picture.