League table/BIG DOG
Make report · 2005–2025
BIG DOG
89.3%
first-time pass rate
4.3%
failed outright
373
MOT tests, 2005–2025
What fails a BIG DOG
failure defects across all BIG DOG models · advisories excluded
lamps and reflectors is BIG DOG's most common failure — 1.9% of all BIG DOG tests record one.
| Component group | Share of defects | % of tests | Worst offenders |
|---|---|---|---|
| lamps and reflectors |
|
1.9 | see ranking |
| lighting and signalling |
|
1.6 | see ranking |
| fuel and exhaust |
|
1.1 | see ranking |
| brakes |
|
0.8 | see ranking |
| steering |
|
0.5 | see ranking |
Top failure groups aggregated across every BIG DOG model, 2005–2025. "% of tests" = share of the make's tests recording at least one defect in that group.
BIG DOG 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.