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 3,149 of 3,150 failed first attempts that recorded an odometer reading in 2025 — the subset the age-and-mileage comparison can be computed on.
Standout: Position lamp (rear) — 6.2% of this year's failed first attempts
Recorded on 196 of those tests. It tops the table on elevation — about 5.3× 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 |
|---|---|---|---|---|---|
|
Wheel bearings (rear)
Suspension > Wheel bearings
|
Rear | 92 | ×9.6 | 2.9% | Likely |
|
Position lamp (rear)
Lamps, reflectors and electrical equipment > Position lamps > Position lamp
|
Rear | 196 | ×5.3 | 6.2% | Strong |
|
Position lamp (front)
Lamps, reflectors and electrical equipment > Position lamps > Position lamp
|
Front | 404 | ×3.4 | 12.8% | Likely |
|
Wheel bearings (front)
Suspension > Wheel bearings
|
Front | 63 | ×3.1 | 2.0% | Likely |
|
Linkage ball joints (front)
Suspension > Anti-roll bars > Linkage ball joints
|
Front | 142 | ×3.1 | 4.5% | Likely |
|
Catalyst emissions
Noise, emissions and leaks > Exhaust emissions > Spark ignition > Catalyst emissions
|
Any | 151 | ×2.1 | 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).