League table/SWM
Make report · 2005–2025
SWM
84.5%
first-time pass rate
7.6%
failed outright
1,237
MOT tests, 2005–2025
SWM at a glance
Most reliable model
RS
84.6% pass
Least reliable model
GRAN MILANO
84.4% pass
Most tested model
RS
228 tests
Among SWM models with ≥ 100 tests.
What fails a SWM
failure defects across all SWM models · advisories excluded
lamps and reflectors is SWM's most common failure — 4.5% of all SWM tests record one.
| Component group | Share of defects | % of tests | Worst offenders |
|---|---|---|---|
| lamps and reflectors |
|
4.5 | see ranking |
| suspension |
|
2.6 | see ranking |
| structure and attachments |
|
2.1 | see ranking |
| Identification of the vehicle |
|
1.5 | — |
| tyres |
|
1 | see ranking |
Top failure groups aggregated across every SWM model, 2005–2025. "% of tests" = share of the make's tests recording at least one defect in that group.
SWM models, ranked by test volume
2 models with ≥ 100 normal tests, 2005–2025
| Model | Pass rate | Pass % | Fail % | Median miles | Tests |
|---|---|---|---|---|---|
| RS |
|
84.6 | 7.5 | 2,858 | 228 |
| GRAN MILANO |
|
84.4 | 6.7 | 2,578 | 135 |
Normal tests only. Median miles is odometer reading at test where recorded. Source: DVSA anonymised MOT results, 2005–2025.