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 817 of 818 failed first attempts (99.9%) that recorded an odometer reading in 2025 — the subset the age-and-mileage comparison can be computed on.
Standout: Position lamp (rear) — 13.7% of this year's failed first attempts
Recorded on 112 of those tests. It tops the table on elevation — about 8.9× 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 |
|---|---|---|---|---|---|
|
Individual direction indicators (rear)
Lamps, reflectors and electrical equipment > Direction indicators > Flashing type > Individual direction indicators
|
Rear | 62 | ×9.7 | 7.6% | Likely |
|
Position lamp (rear)
Lamps, reflectors and electrical equipment > Position lamps > Position lamp
|
Rear | 112 | ×8.9 | 13.7% | Strong |
|
Electrical equipment — Horn
Lamps, reflectors and electrical equipment > Electrical equipment > Horn
|
Any | 51 | ×4.6 | 6.2% | Likely |
|
Rigid brake pipes (rear)
Brakes > Rigid brake pipes
|
Rear | 29 | ×3.8 | 3.5% | Possible |
|
Linkage ball joint dust cover (front)
Suspension > Anti-roll bars > Linkage ball joint dust cover
|
Front | 69 | ×3.2 | 8.4% | Likely |
|
Ball joint dust cover (front)
Suspension > Anti-roll bars > Ball joint dust cover
|
Front | 25 | ×2.9 | 3.1% | Possible |
|
Visibility — Wipers (front)
Visibility > Wipers
|
Front | 47 | ×2.1 | 5.8% | Possible |
|
Malfunction indicator lamp
Noise, emissions and leaks > Exhaust emissions > Compression ignition > Malfunction indicator lamp
|
Any | 39 | ×2.0 | 4.8% | 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).