Mazda 323 executive vs Mazda 6: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Mazda 323 executive
63%
MOT pass rate · 1,087 vehicles
Mazda 6
75%
MOT pass rate · 159,403 vehicles
More reliable
Verdict: On MOT pass rate, the Mazda 6 is the more reliable of the two — 75% pass first time versus 63%. It's one signal among several; check the full breakdown below.
Head to head
| Measure | Mazda 323 executive | Mazda 6 |
|---|---|---|
| MOT pass rate | 63% | 75% ✓ |
| MOT failure rate | 37% | 25% ✓ |
| Faults & advisories per test | 2.2 | 1.9 ✓ |
| Dangerous-fault share | 0% ✓ | 2% |
| Average mileage | 111,450 mi | 113,866 mi |
| Sample size (vehicles) | 1,087 | 159,403 |
Most common faults
Mazda 323 executive
- 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 Front Tyre tread depth below requirements of 1.6mm (4.1.E.1)
- Offside Front Tyre tread depth below requirements of 1.6mm (4.1.E.1)
- Offside Registration plate lamp not working (1.1.5c)
- Front Brake pad(s) wearing thin (3.5.1g)
Mazda 6
- 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)
- Rear Brake pad(s) wearing thin (3.5.1g)
- Offside Rear Tyre worn close to the legal limit (4.1.E.1)
- Under-trays fitted obscuring some underside components
Reliability FAQ
On MOT pass rate, the Mazda 6 is the more reliable of the two — 75% pass first time versus 63%. It's one signal among several; check the full breakdown below.
Full Mazda 323 executive report Full Mazda 6 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.