Audi A3 vs Audi A4 allroad quattro: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Audi A3
78%
MOT pass rate · 586,036 vehicles
Audi A4 allroad quattro
84%
MOT pass rate · 2 vehicles
Verdict: On MOT pass rate the Audi A3 (78%) and Audi A4 allroad quattro (84%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Head to head
| Measure | Audi A3 | Audi A4 allroad quattro |
|---|---|---|
| MOT pass rate | 78% | 84% ✓ |
| MOT failure rate | 22% | 16% ✓ |
| Faults & advisories per test | 1.8 | 0.9 ✓ |
| Dangerous-fault share | 3% ✓ | 11% |
| Average mileage | 112,882 mi | 96,980 mi |
| Sample size (vehicles) | 586,036 | 2 |
Most common faults
Audi A3
- Offside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
- Nearside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
- 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)
Audi A4 allroad quattro
- Nearside Front Suspension arm ball joint dust cover severely deteriorated (5.3.4 (b) (i))
- Nearside Front Suspension arm ball joint has slight play (5.3.4 (a) (i))
- Registration plate lamp inoperative in the case of multiple lamps or light sources (4.7.1 (b) (i))
- Nearside Rear Child Seat fitted not allowing full inspection of adult belt
- Offside Rear Child Seat fitted not allowing full inspection of adult belt
- Nearside Front Suspension arm pin or bush worn but not resulting in excessive movement (5.3.4 (a) (i))
Reliability FAQ
On MOT pass rate the Audi A3 (78%) and Audi A4 allroad quattro (84%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Audi A3 report Full Audi A4 allroad quattro 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.