League table/SIL
Make report · 2005–2025
SIL
87.6%
first-time pass rate
6.7%
failed outright
492
MOT tests, 2005–2025
What fails a SIL
failure defects across all SIL models · advisories excluded
lighting and signalling is SIL's most common failure — 2.6% of all SIL tests record one.
| Component group | Share of defects | % of tests | Worst offenders |
|---|---|---|---|
| lighting and signalling |
|
2.6 | see ranking |
| brakes |
|
2 | see ranking |
| steering and suspension |
|
1.2 | see ranking |
| tyres and wheels |
|
1.2 | see ranking |
| reg plates and vin |
|
0.6 | — |
Top failure groups aggregated across every SIL model, 2005–2025. "% of tests" = share of the make's tests recording at least one defect in that group.
SIL 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.