League table/SMC
Make report · 2005–2025
SMC
73.4%
first-time pass rate
20.1%
failed outright
793
MOT tests, 2005–2025
What fails a SMC
failure defects across all SMC models · advisories excluded
lighting and signalling is SMC's most common failure — 10.3% of all SMC tests record one.
| Component group | Share of defects | % of tests | Worst offenders |
|---|---|---|---|
| lighting and signalling |
|
10.3 | see ranking |
| brakes |
|
8.3 | see ranking |
| steering and suspension |
|
7.1 | see ranking |
| fuel and exhaust |
|
3.9 | see ranking |
| tyres and wheels |
|
2 | see ranking |
Top failure groups aggregated across every SMC model, 2005–2025. "% of tests" = share of the make's tests recording at least one defect in that group.
SMC models, ranked by test volume
0 models with ≥ 100 normal tests, 2005–2025
| Model | Pass rate | Pass % | Fail % | Median miles | Tests |
|---|
Normal tests only. Median miles is odometer reading at test where recorded. Source: DVSA anonymised MOT results, 2005–2025.