League table/JM STAR
Make report · 2005–2025
JM STAR
61.1%
first-time pass rate
31.0%
failed outright
871
MOT tests, 2005–2025
JM STAR at a glance
Most reliable model
JSD 50 QT-13
61.4% pass
Least reliable model
MADNESS
53.7% pass
Most tested model
JSD 50 QT-13
285 tests
Among JM STAR models with ≥ 100 tests.
What fails a JM STAR
failure defects across all JM STAR models · advisories excluded
lighting and signalling is JM STAR's most common failure — 18.1% of all JM STAR tests record one.
| Component group | Share of defects | % of tests | Worst offenders |
|---|---|---|---|
| lighting and signalling |
|
18.1 | see ranking |
| steering and suspension |
|
15.4 | see ranking |
| brakes |
|
13.1 | see ranking |
| tyres and wheels |
|
6.8 | see ranking |
| fuel and exhaust |
|
2.8 | see ranking |
Top failure groups aggregated across every JM STAR model, 2005–2025. "% of tests" = share of the make's tests recording at least one defect in that group.
JM STAR models, ranked by test volume
2 models with ≥ 100 normal tests, 2005–2025
| Model | Pass rate | Pass % | Fail % | Median miles | Tests |
|---|---|---|---|---|---|
| JSD 50 QT-13 |
|
61.4 | 28.8 | 2,832 | 285 |
| MADNESS |
|
53.7 | 38.2 | 6,479 | 123 |
Normal tests only. Median miles is odometer reading at test where recorded. Source: DVSA anonymised MOT results, 2005–2025.