League table/BTM
Make report · 2005–2025
BTM
64.4%
first-time pass rate
26.2%
failed outright
2,059
MOT tests, 2005–2025
BTM at a glance
Most reliable model
BT125T-12
68.9% pass
Least reliable model
BT49QT-9
61.6% pass
Most tested model
BT49QT-9
159 tests
Among BTM models with ≥ 100 tests.
What fails a BTM
failure defects across all BTM models · advisories excluded
lighting and signalling is BTM's most common failure — 12.2% of all BTM tests record one.
| Component group | Share of defects | % of tests | Worst offenders |
|---|---|---|---|
| lighting and signalling |
|
12.2 | see ranking |
| steering and suspension |
|
11.9 | see ranking |
| brakes |
|
8.8 | see ranking |
| tyres and wheels |
|
6.7 | see ranking |
| lamps and reflectors |
|
1.7 | see ranking |
Top failure groups aggregated across every BTM model, 2005–2025. "% of tests" = share of the make's tests recording at least one defect in that group.
BTM models, ranked by test volume
3 models with ≥ 100 normal tests, 2005–2025
| Model | Pass rate | Pass % | Fail % | Median miles | Tests |
|---|---|---|---|---|---|
| BT49QT-9 |
|
61.6 | 28.3 | 6,270 | 159 |
| BT125T-12 |
|
68.9 | 25.8 | 5,182 | 151 |
| BT49QT |
|
66.1 | 20.2 | 4,142 | 109 |
Normal tests only. Median miles is odometer reading at test where recorded. Source: DVSA anonymised MOT results, 2005–2025.