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 631 of 632 failed first attempts (99.8%) that recorded an odometer reading in 2025 — the subset the age-and-mileage comparison can be computed on.
Standout: Chassis condition (rear) — 18.1% of this year's failed first attempts
Recorded on 114 of those tests. It tops the table on elevation — about 12× 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 |
|---|---|---|---|---|---|
|
Spring mounting prescribed areas (rear)
Suspension > Springs > Spring mounting prescribed areas
|
Rear | 33 | ×17 | 5.2% | Likely |
|
Prop shafts — Joints (front)
Body, chassis, structure > Transmission > Prop shafts > Joints
|
Front | 22 | ×14 | 3.5% | Possible |
|
Chassis condition (rear)
Body, chassis, structure > Chassis > Chassis condition
|
Rear | 114 | ×12 | 18.1% | Strong |
|
Service brake performance
Brakes > Brake performance > Service Brake Efficiency (sp) > Rbt (sp) > Service brake performance
|
Any | 34 | ×7.0 | 5.4% | Likely |
|
Service brake imbalance (rear)
Brakes > Brake performance > Service Brake Efficiency (sp) > Rbt (sp) > Service brake imbalance
|
Rear | 41 | ×4.9 | 6.5% | Likely |
|
Wheel bearings (front)
Suspension > Wheel bearings
|
Front | 42 | ×3.9 | 6.7% | Likely |
|
Component mounting prescribed areas (rear)
Suspension > Component mounting prescribed areas
|
Rear | 93 | ×2.8 | 14.7% | Possible |
|
Track rod end
Steering > Steering linkage components > Track rod end
|
Any | 27 | ×2.4 | 4.3% | Possible |
|
Electrical equipment — Horn
Lamps, reflectors and electrical equipment > Electrical equipment > Horn
|
Any | 22 | ×2.3 | 3.5% | Possible |
|
Rear fog lamp
Lamps, reflectors and electrical equipment > Front and rear fog lamps > Rear fog lamp > Rear fog lamp
|
Any | 25 | ×2.2 | 4.0% | 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).