Audi A3 vs Audi Tt s-line 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 Tt s-line quattro
83%
MOT pass rate · 1 vehicles
Verdict: On MOT pass rate the Audi A3 (78%) and Audi Tt s-line quattro (83%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Head to head
| Measure | Audi A3 | Audi Tt s-line quattro |
|---|---|---|
| MOT pass rate | 78% | 83% ✓ |
| MOT failure rate | 22% | 17% ✓ |
| Faults & advisories per test | 1.8 ✓ | 1.9 |
| Dangerous-fault share | 3% | 0% ✓ |
| Average mileage | 112,882 mi | 102,912 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 Tt s-line quattro
- Front Inner Brake disc worn, pitted or scored, but not seriously weakened (1.1.14 (a) (ii))
- Rear Inner Brake disc worn, pitted or scored, but not seriously weakened (1.1.14 (a) (ii))
- Engine covers And Undertrays fitted obscuring some components
- 245/35R19 CONTINENTAL CONTI SPORT CONTACT 3* EXTRA LOAD ALROUND
- Nearside Front Tyre worn close to the legal limit 2.49 mm (4.1.E.1)
- Nearside Headlamp aim too high (1.8)
Reliability FAQ
On MOT pass rate the Audi A3 (78%) and Audi Tt s-line quattro (83%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Audi A3 report Full Audi Tt s-line 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.