These MOT failure patterns show up more often on this registration year than on similar cars of the same class, age, and mileage.
Shares below are measured across the 1,078 failed first attempts in 2025 that the age-and-mileage comparison can be computed on.
Standout: Position lamp (rear) — 14.1% of this year's failed first attempts
Recorded on 152 of those tests. It tops the table on elevation — about 5.4× more often than on similar cars of the same age and mileage. On this year it is also the commonest failure, so it answers both questions at once. The full ranked list is in the table below.
| Fault pattern | Location | Failures | vs similar cars | Share of fails | Confidence |
|---|---|---|---|---|---|
|
Position lamp (rear)
Lamps, reflectors and electrical equipment > Position lamps > Position lamp
|
Rear | 152 | ×5.4 | 14.1% | Strong |
|
Electrical equipment — Horn
Lamps, reflectors and electrical equipment > Electrical equipment > Horn
|
Any | 62 | ×4.7 | 5.8% | Likely |
|
Rigid brake pipes (rear)
Brakes > Rigid brake pipes
|
Rear | 65 | ×3.6 | 6.0% | Likely |
|
Ball joint dust cover (front)
Suspension > Anti-roll bars > Ball joint dust cover
|
Front | 53 | ×3.1 | 4.9% | Likely |
|
Parking brake control — Lever
Brakes > Parking brake control > Lever
|
Any | 28 | ×2.9 | 2.6% | Possible |
|
Linkage ball joint dust cover (front)
Suspension > Anti-roll bars > Linkage ball joint dust cover
|
Front | 116 | ×2.7 | 10.8% | Possible |
|
Registration plate lamp(s) (rear)
Lamps, reflectors and electrical equipment > Registration plate lamp(s)
|
Rear | 72 | ×2.6 | 6.7% | Possible |
Only patterns that clear minimum sample and elevation thresholds are shown (at least 20 failures and about 2.0× more often than similar cars).