Audi A3 vs Audi A4 sallon 40 tfsi s line: 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 sallon 40 tfsi s line
100%
MOT pass rate · 1 vehicles
Verdict: On MOT pass rate the Audi A3 (78%) and Audi A4 sallon 40 tfsi s line (100%) 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 sallon 40 tfsi s line |
|---|---|---|
| MOT pass rate | 78% | 100% ✓ |
| MOT failure rate | 22% | 0% ✓ |
| Faults & advisories per test | 1.8 | 0.0 ✓ |
| Dangerous-fault share | 3% | — ✓ |
| Average mileage | 112,882 mi | 41,462 mi |
| Sample size (vehicles) | 586,036 | 1 |
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 sallon 40 tfsi s line
No fault breakdown available.
Reliability FAQ
On MOT pass rate the Audi A3 (78%) and Audi A4 sallon 40 tfsi s line (100%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Audi A3 report Full Audi A4 sallon 40 tfsi s line 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.