Does the Mitsubishi ASX fail the MOT on noise, emissions and leaks more than it should?
The Mitsubishi ASX records 1.33 noise, emissions and leaks failure items per 100 initial MOT tests (2019–2024), against 1.96 expected for a car of the same age mix: less than expected for its class and age (−0.63, 95% interval −0.70 to −0.56). It ranks 389 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 Mitsubishi ASX by registration
What exactly fails on noise, emissions and leaks?
The most frequent DVSA defect wording in this group on the Mitsubishi ASX is “Emissions test unable to be completed”, recorded 660 times in 2019–2024.
| DVSA defect wording | Items | Per 100 tests |
|---|---|---|
| Emissions test unable to be completed | 660 | 0.41 |
| Engine MIL illuminated indicating a malfunction | 644 | 0.40 |
| An induction or exhaust leak that could affect emissions levels | 220 | 0.14 |
| Lambda coefficient outside the default limits or the range specified by the manufacturer | 218 | 0.13 |
| Smoke opacity levels exceed the manufacturer's specified limit | 145 | 0.09 |
Source: DVSA MOT bulk data (OGL v3.0) · Window: 2019–2024 · n = 162,197 (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 Mitsubishi ASX gets a noise, emissions and leaks advisory, how often does it fail next time?
4.9% of Mitsubishi ASX 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 8,396 miles later (2,012 advisories followed).
Source: DVSA MOT bulk data (OGL v3.0) · Window: 2019–2024 · n = 2,012 (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
Mitsubishi ASX 2010 · Mitsubishi ASX 2011 · Mitsubishi ASX 2012 · Mitsubishi ASX 2013 · Mitsubishi ASX 2014 · Mitsubishi ASX 2015 · Mitsubishi ASX 2016 · Mitsubishi ASX 2017 · Mitsubishi ASX 2018 · Mitsubishi ASX 2019 · Mitsubishi ASX 2020 · Mitsubishi ASX in Norway · Mitsubishi ASX in Finland · Mitsubishi ASX in the Netherlands · Mitsubishi ASX by postcode area · Mitsubishi ASX body, chassis and structure failures · Mitsubishi ASX brakes failures · Mitsubishi ASX vehicle identification failures · Mitsubishi ASX lamps, reflectors and electrics failures · Mitsubishi ASX road wheels failures · Mitsubishi ASX seat belts and airbags failures · Mitsubishi ASX steering failures · Mitsubishi ASX suspension failures · Mitsubishi ASX tyres failures · Mitsubishi ASX visibility failures