Does the Fiat 500X fail the MOT on noise, emissions and leaks more than it should?
The Fiat 500X records 1.68 noise, emissions and leaks failure items per 100 initial MOT tests (2019–2024), against 1.10 expected for a car of the same age mix: more than expected for its class and age (+0.58, 95% interval +0.52 to +0.64). It ranks 171 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 Fiat 500X by registration
What exactly fails on noise, emissions and leaks?
The most frequent DVSA defect wording in this group on the Fiat 500X is “Engine MIL illuminated indicating a malfunction”, recorded 2,129 times in 2019–2024.
| DVSA defect wording | Items | Per 100 tests |
|---|---|---|
| Engine MIL illuminated indicating a malfunction | 2,129 | 1.20 |
| Lambda coefficient outside the default limits or the range specified by the manufacturer | 433 | 0.24 |
| Emissions test unable to be completed | 174 | 0.10 |
| Fluid leaking excessively and likely to harm the environment or to pose a safety risk to other road users | 77 | 0.04 |
| An induction or exhaust leak that could affect emissions levels | 55 | 0.03 |
Source: DVSA MOT bulk data (OGL v3.0) · Window: 2019–2024 · n = 178,008 (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 Fiat 500X gets a noise, emissions and leaks advisory, how often does it fail next time?
4.0% of Fiat 500X 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 7,946 miles later (873 advisories followed).
Source: DVSA MOT bulk data (OGL v3.0) · Window: 2019–2024 · n = 873 (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
Fiat 500X 2015 · Fiat 500X 2016 · Fiat 500X 2017 · Fiat 500X 2018 · Fiat 500X 2019 · Fiat 500X 2020 · Fiat 500X in the Netherlands · Fiat 500X by postcode area · Fiat 500X body, chassis and structure failures · Fiat 500X brakes failures · Fiat 500X vehicle identification failures · Fiat 500X lamps, reflectors and electrics failures · Fiat 500X road wheels failures · Fiat 500X seat belts and airbags failures · Fiat 500X steering failures · Fiat 500X suspension failures · Fiat 500X tyres failures · Fiat 500X visibility failures