Mazda 121 glx auto vs Mazda 6: reliability comparison
MOT pass rates, common faults and mileage compared from real UK MOT data.
Mazda 121 glx auto
61%
MOT pass rate · 337 vehicles
Mazda 6
75%
MOT pass rate · 159,403 vehicles
Verdict: On MOT pass rate the Mazda 121 glx auto (61%) and Mazda 6 (75%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Head to head
| Measure | Mazda 121 glx auto | Mazda 6 |
|---|---|---|
| MOT pass rate | 61% | 75% ✓ |
| MOT failure rate | 39% | 25% ✓ |
| Faults & advisories per test | 1.7 ✓ | 1.9 |
| Dangerous-fault share | 0% ✓ | 2% |
| Average mileage | 82,686 mi | 113,866 mi |
| Sample size (vehicles) | 337 | 159,403 |
Most common faults
Mazda 121 glx auto
- Nearside Rear Suspension component mounting prescribed area is excessively corroded (2.4.A.3)
- Offside Rear Suspension component mounting prescribed area is excessively corroded (2.4.A.3)
- Fuel pipe/s corroded
- Offside Rear Brake pipe excessively corroded (3.6.B.2c)
- Nearside Registration plate lamp not working (1.1.5c)
- Front Exhaust has a major leak of exhaust gases (7.1.2)
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 121 glx auto (61%) and Mazda 6 (75%) are very close — weigh the individual measures below, and remember condition depends on age, mileage and upkeep.
Full Mazda 121 glx auto 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.