Does the Mazda 6 fail the MOT on noise, emissions and leaks more than it should?
The Mazda 6 records 3.67 noise, emissions and leaks failure items per 100 initial MOT tests (2019–2024), against 3.57 expected for a car of the same age mix: about as expected for its class and age (the difference is within its interval or under 0.5 items per 100 tests) (+0.10, 95% interval +0.04 to +0.16). It ranks 235 of 678 models on noise, emissions and leaks (1 = most failures above expected).
Data release dvsa-2024-v2 (24 Sep 2026) · page updated 30 Sep 2026 · all models on noise, emissions and leaks · check a Mazda 6 by registration
What exactly fails on noise, emissions and leaks?
The most frequent DVSA defect wording in this group on the Mazda 6 is “Engine MIL illuminated indicating a malfunction”, recorded 4,573 times in 2019–2024.
| DVSA defect wording | Items | Per 100 tests |
|---|---|---|
| Engine MIL illuminated indicating a malfunction | 4,573 | 1.06 |
| Lambda coefficient outside the default limits or the range specified by the manufacturer | 2,217 | 0.51 |
| Emissions test unable to be completed | 1,831 | 0.42 |
| Emissions levels exceed default limits | 1,594 | 0.37 |
| Smoke opacity levels exceed the manufacturer's specified limit | 1,353 | 0.31 |
Source: DVSA MOT bulk data (OGL v3.0) · Window: 2019–2024 · n = 433,186 (initial tests) · Method: failure items (major and minor) grouped by DVSA's defect tree; wordings with 30+ items · Updated: 30 Sep 2026 · Release: dvsa-2024-v2 · CSV
If a Mazda 6 gets a noise, emissions and leaks advisory, how often does it fail next time?
8.6% of Mazda 6 MOTs with a noise, emissions and leaks advisory were followed by a fail in the same group at the next MOT, typically 12 months and 5,814 miles later (5,108 advisories followed).
Source: DVSA MOT bulk data (OGL v3.0) · Window: 2019–2024 · n = 5,108 (advisories followed) · Method: the same vehicles followed to their next ordinary MOT · Updated: 30 Sep 2026 · Release: dvsa-2024-v2 · CSV
Other pages for this model
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