Does the Smart City fail the MOT on noise, emissions and leaks more than it should?
The Smart City records 10.39 noise, emissions and leaks failure items per 100 initial MOT tests (2019–2024), against 8.80 expected for a car of the same age mix: more than expected for its class and age (+1.59, 95% interval +0.82 to +2.37). It ranks 104 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 Smart City by registration
What exactly fails on noise, emissions and leaks?
The most frequent DVSA defect wording in this group on the Smart City is “Lambda coefficient outside the default limits or the range specified by the manufacturer”, recorded 273 times in 2019–2024.
| DVSA defect wording | Items | Per 100 tests |
|---|---|---|
| Lambda coefficient outside the default limits or the range specified by the manufacturer | 273 | 4.12 |
| Emissions levels exceed default limits | 142 | 2.15 |
| Emissions test unable to be completed | 61 | 0.92 |
| Emissions levels exceed the manufacturer's specified limits | 54 | 0.82 |
| Engine MIL illuminated indicating a malfunction | 48 | 0.73 |
Source: DVSA MOT bulk data (OGL v3.0) · Window: 2019–2024 · n = 6,619 (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
Smart City 2004 · Smart City 2005 · Smart City 2006 · Smart City 2007 · Smart City by postcode area · Smart City body, chassis and structure failures · Smart City brakes failures · Smart City vehicle identification failures · Smart City lamps, reflectors and electrics failures · Smart City seat belts and airbags failures · Smart City steering failures · Smart City suspension failures · Smart City tyres failures · Smart City visibility failures