Mazda 3 vs Mazda 6 sport auto: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Mazda 3
78%
MOT pass rate · 164,058 vehicles
Mazda 6 sport auto
88%
MOT pass rate · 10 vehicles
Verdict: On MOT pass rate the Mazda 3 (78%) and Mazda 6 sport auto (88%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Head to head
| Measure | Mazda 3 | Mazda 6 sport auto |
|---|---|---|
| MOT pass rate | 78% | 88% ✓ |
| MOT failure rate | 22% | 12% ✓ |
| Faults & advisories per test | 2.0 | 0.0 ✓ |
| Dangerous-fault share | 3% | — ✓ |
| Average mileage | 90,915 mi | 123,041 mi |
| Sample size (vehicles) | 164,058 | 10 |
Most common faults
Mazda 3
- 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 Front Tyre worn close to the legal limit (4.1.E.1)
- Rear Sub-frame corroded but not seriously weakened (5.3.3 (b) (i))
- Offside Front Tyre worn close to the legal limit (4.1.E.1)
- Front Brake pad(s) wearing thin (1.1.13 (a) (ii))
Mazda 6 sport auto
No fault breakdown available.
Reliability FAQ
On MOT pass rate the Mazda 3 (78%) and Mazda 6 sport auto (88%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Mazda 3 report Full Mazda 6 sport auto 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.