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 2,783 failed first attempts in 2025 that the age-and-mileage comparison can be computed on.
Standout: Service brake performance (rear) — 4.0% of this year's failed first attempts
Recorded on 112 of those tests. It tops the table on elevation — about 17× more often than on similar cars of the same age and mileage. That is what makes it unusual for its class, which is a different question from what is most likely to fail; the buying checklist ranks by that. The full ranked list is in the table below.
| Fault pattern | Location | Failures | vs similar cars | Share of fails | Confidence |
|---|---|---|---|---|---|
|
Service brake performance (rear)
Brakes > Brake performance > Service brake performance > Plate brake tester > Service brake performance
|
Rear | 112 | ×17 | 4.0% | Strong |
|
Service brake performance (rear)
Brakes > Brake performance > Service brake performance > Rbt > Service brake performance
|
Rear | 492 | ×12 | 17.7% | Strong |
|
Service brake imbalance (rear)
Brakes > Brake performance > Service Brake Efficiency (sp) > Rbt (sp) > Service brake imbalance
|
Rear | 63 | ×6.2 | 2.3% | Likely |
|
Rigid brake pipes (rear)
Brakes > Rigid brake pipes
|
Rear | 73 | ×5.4 | 2.6% | Likely |
|
Wheel bearings (front)
Suspension > Wheel bearings
|
Front | 59 | ×5.3 | 2.1% | Likely |
|
Electrical equipment — Horn
Lamps, reflectors and electrical equipment > Electrical equipment > Horn
|
Any | 64 | ×4.6 | 2.3% | Likely |
|
Registration plate lamp(s) (rear)
Lamps, reflectors and electrical equipment > Registration plate lamp(s)
|
Rear | 159 | ×4.5 | 5.7% | Likely |
|
Pins and bushes (front)
Suspension > Suspension arms > Pins and bushes
|
Front | 378 | ×3.5 | 13.6% | Likely |
|
Headlamp (front)
Lamps, reflectors and electrical equipment > Headlamps > Headlamp
|
Front | 135 | ×2.5 | 4.9% | Possible |
|
Position lamp (front)
Lamps, reflectors and electrical equipment > Position lamps > Position lamp
|
Front | 147 | ×2.0 | 5.3% | 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).