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 747 failed first attempts in 2025 that the age-and-mileage comparison can be computed on.
Standout: Ball joint (front) — 40.4% of this year's failed first attempts
Recorded on 302 of those tests. It tops the table on elevation — about 27× 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 |
|---|---|---|---|---|---|
|
Ball joint (front)
Suspension > Suspension arms > Ball joint
|
Front | 302 | ×27 | 40.4% | Strong |
|
Linkage ball joints (front)
Suspension > Anti-roll bars > Linkage ball joints
|
Front | 68 | ×24 | 9.1% | Likely |
|
Individual direction indicators (rear)
Lamps, reflectors and electrical equipment > Direction indicators > Flashing type > Individual direction indicators
|
Rear | 29 | ×12 | 3.9% | Possible |
|
Stop lamp (rear)
Lamps, reflectors and electrical equipment > Stop lamp
|
Rear | 40 | ×4.5 | 5.4% | Likely |
|
Service brake performance (rear)
Brakes > Brake performance > Service brake performance > Rbt > Service brake performance
|
Rear | 20 | ×2.8 | 2.7% | Possible |
|
Rbt (sp)
Brakes > Brake performance > Parking brake efficiency (sp) > Rbt (sp)
|
Any | 24 | ×2.7 | 3.2% | Possible |
|
Headlamp
Lamps, reflectors and electrical equipment > Headlamps > Headlamp
|
Any | 35 | ×2.2 | 4.7% | 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).