Does the Mazda CX-30 fail the MOT on noise, emissions and leaks more than it should?
The Mazda CX-30 records 0.53 noise, emissions and leaks failure items per 100 initial MOT tests (2019–2024), against 0.47 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) (+0.06, 95% interval −0.04 to +0.16). It ranks 243 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 CX-30 by registration
What exactly fails on noise, emissions and leaks?
The most frequent DVSA defect wording in this group on the Mazda CX-30 is “Engine MIL illuminated indicating a malfunction”, recorded 98 times in 2019–2024.
| DVSA defect wording | Items | Per 100 tests |
|---|---|---|
| Engine MIL illuminated indicating a malfunction | 98 | 0.44 |
Source: DVSA MOT bulk data (OGL v3.0) · Window: 2019–2024 · n = 22,108 (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
Other pages for this model
Mazda CX-30 2019 · Mazda CX-30 2020 · Mazda CX-30 in Norway · Mazda CX-30 in the Netherlands · Mazda CX-30 by postcode area · Mazda CX-30 brakes failures · Mazda CX-30 lamps, reflectors and electrics failures · Mazda CX-30 suspension failures · Mazda CX-30 tyres failures · Mazda CX-30 visibility failures