League table/SFM
Make report · 2005–2025
SFM
59.1%
first-time pass rate
30.1%
failed outright
607
MOT tests, 2005–2025
SFM at a glance
Most reliable model
ROADSTER
65.2% pass
Least reliable model
ZZ
55.6% pass
Most tested model
ZZ
234 tests
Among SFM models with ≥ 100 tests.
What fails a SFM
failure defects across all SFM models · advisories excluded
lamps and reflectors is SFM's most common failure — 14.8% of all SFM tests record one.
| Component group | Share of defects | % of tests | Worst offenders |
|---|---|---|---|
| lamps and reflectors |
|
14.8 | see ranking |
| brakes |
|
12 | see ranking |
| structure and attachments |
|
11.9 | see ranking |
| suspension |
|
9.2 | see ranking |
| lighting and signalling |
|
4.8 | see ranking |
Top failure groups aggregated across every SFM model, 2005–2025. "% of tests" = share of the make's tests recording at least one defect in that group.
SFM models, ranked by test volume
3 models with ≥ 100 normal tests, 2005–2025
| Model | Pass rate | Pass % | Fail % | Median miles | Tests |
|---|---|---|---|---|---|
| ZZ |
|
55.6 | 34.2 | 5,658 | 234 |
| ROADSTER |
|
65.2 | 24.1 | 5,600 | 141 |
| ZX |
|
61.0 | 28.4 | 4,956 | 141 |
Normal tests only. Median miles is odometer reading at test where recorded. Source: DVSA anonymised MOT results, 2005–2025.