League table/COSSACK
Make report · 2005–2025
COSSACK
85.0%
first-time pass rate
7.4%
failed outright
747
MOT tests, 2005–2025
What fails a COSSACK
failure defects across all COSSACK models · advisories excluded
steering and suspension is COSSACK's most common failure — 3.2% of all COSSACK tests record one.
| Component group | Share of defects | % of tests | Worst offenders |
|---|---|---|---|
| steering and suspension |
|
3.2 | see ranking |
| lighting and signalling |
|
2.9 | see ranking |
| brakes |
|
3.3 | see ranking |
| tyres and wheels |
|
2.8 | see ranking |
| sidecar |
|
0.9 | — |
Top failure groups aggregated across every COSSACK model, 2005–2025. "% of tests" = share of the make's tests recording at least one defect in that group.
COSSACK 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.