Mazda 6 vs Mazda Eunos cosmo: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Mazda 6
75%
MOT pass rate · 159,403 vehicles
Mazda Eunos cosmo
80%
MOT pass rate · 5 vehicles
Verdict: On MOT pass rate the Mazda 6 (75%) and Mazda Eunos cosmo (80%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Head to head
| Measure | Mazda 6 | Mazda Eunos cosmo |
|---|---|---|
| MOT pass rate | 75% | 80% ✓ |
| MOT failure rate | 25% | 20% ✓ |
| Faults & advisories per test | 1.9 ✓ | 2.0 |
| Dangerous-fault share | 2% | 0% ✓ |
| Average mileage | 113,866 mi | 79,733 mi |
| Sample size (vehicles) | 159,403 | 5 |
Most common faults
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
Mazda Eunos cosmo
- Offside Rear Upper Suspension arm has slight play in a pin/bush (2.4.G.2)
- Nearside Rear Upper Suspension arm has slight play in a pin/bush (2.4.G.2)
- rear suspension dust boots split
- Offside Rear Tyre tread depth below requirements of 1.6mm (4.1.E.1)
- rear exhaust thin
- rea exhaust thin
Reliability FAQ
On MOT pass rate the Mazda 6 (75%) and Mazda Eunos cosmo (80%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Mazda 6 report Full Mazda Eunos cosmo 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.