Audi A 4 vs Audi A1: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Audi A 4
69%
MOT pass rate · 13 vehicles
Audi A1
84%
MOT pass rate · 235,482 vehicles
Verdict: On MOT pass rate the Audi A 4 (69%) and Audi A1 (84%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Head to head
| Measure | Audi A 4 | Audi A1 |
|---|---|---|
| MOT pass rate | 69% | 84% ✓ |
| MOT failure rate | 31% | 16% ✓ |
| Faults & advisories per test | 1.8 | 1.5 ✓ |
| Dangerous-fault share | 0% ✓ | 5% |
| Average mileage | 159,889 mi | 67,791 mi |
| Sample size (vehicles) | 13 | 235,482 |
Most common faults
Audi A 4
- Nearside Rear Tyre worn close to the legal limit (4.1.E.1)
- Offside Rear wheel bearing has slight play (2.6.2)
- Offside Front Tyre worn close to the legal limit (4.1.E.1)
- Nearside Front Tyre worn close to the legal limit (4.1.E.1)
- Nearside Headlamp aim too high (1.8)
- Offside Front Brake hose slightly deteriorated (3.6.B.4d)
Audi A1
- 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))
- Rear Brake disc worn, pitted or scored, but not seriously weakened (1.1.14 (a) (ii))
- Offside Rear Tyre slightly damaged/cracking or perishing (5.2.3 (d) (ii))
- Nearside Rear Tyre slightly damaged/cracking or perishing (5.2.3 (d) (ii))
- Nearside Rear Tyre worn close to legal limit/worn on edge (5.2.3 (e))
Reliability FAQ
On MOT pass rate the Audi A 4 (69%) and Audi A1 (84%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Audi A 4 report Full Audi A1 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.