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 4,855 failed first attempts in 2025 that the age-and-mileage comparison can be computed on.
Standout: Registration plate lamp(s) (rear) — 14.9% of this year's failed first attempts
Recorded on 721 of those tests. It tops the table on elevation — about 9.7× 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 |
|---|---|---|---|---|---|
|
Registration plate lamp(s) (rear)
Lamps, reflectors and electrical equipment > Registration plate lamp(s)
|
Rear | 721 | ×9.7 | 14.9% | Strong |
|
Drive shafts — Joints (front)
Body, chassis, structure > Transmission > Drive shafts > Joints
|
Front | 1,254 | ×8.7 | 25.8% | Strong |
|
Exhaust system (front)
Body, chassis, structure > Exhaust system
|
Front | 138 | ×5.4 | 2.8% | Strong |
|
Headlamp (front)
Lamps, reflectors and electrical equipment > Headlamps > Headlamp
|
Front | 408 | ×3.4 | 8.4% | Likely |
|
Catalyst emissions
Noise, emissions and leaks > Exhaust emissions > Spark ignition > Catalyst emissions
|
Any | 303 | ×3.2 | 6.2% | Likely |
Only patterns that clear minimum sample and elevation thresholds are shown (at least 20 failures and about 2.0× more often than similar cars).