Audi A4 avant s line tdi qtr vs Audi A6: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Audi A4 avant s line tdi qtr
71%
MOT pass rate · 6 vehicles
Audi A6
78%
MOT pass rate · 246,602 vehicles
Verdict: On MOT pass rate the Audi A4 avant s line tdi qtr (71%) and Audi A6 (78%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Head to head
| Measure | Audi A4 avant s line tdi qtr | Audi A6 |
|---|---|---|
| MOT pass rate | 71% | 78% ✓ |
| MOT failure rate | 29% | 22% ✓ |
| Faults & advisories per test | 0.0 ✓ | 1.7 |
| Dangerous-fault share | — ✓ | 2% |
| Average mileage | 176,541 mi | 136,441 mi |
| Sample size (vehicles) | 6 | 246,602 |
Most common faults
Audi A4 avant s line tdi qtr
No fault breakdown available.
Audi A6
- 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 Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
- Offside Front Tyre worn close to legal limit/worn on edge (5.2.3 (e))
- 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)
Reliability FAQ
On MOT pass rate the Audi A4 avant s line tdi qtr (71%) and Audi A6 (78%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Audi A4 avant s line tdi qtr report Full Audi A6 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.