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 7,917 of 7,940 failed first attempts (99.7%) that recorded an odometer reading in 2025 — the subset the age-and-mileage comparison can be computed on.
Standout: Leaf spring (rear) — 4.0% of this year's failed first attempts
Recorded on 318 of those tests. It tops the table on elevation — about 35× 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 |
|---|---|---|---|---|---|
|
Leaf spring (rear)
Suspension > Springs > Leaf springs > Leaf spring
|
Rear | 318 | ×35 | 4.0% | Strong |
|
Rigid brake pipes (front)
Brakes > Rigid brake pipes
|
Front | 545 | ×12 | 6.9% | Strong |
|
Component mounting prescribed areas (rear)
Suspension > Component mounting prescribed areas
|
Rear | 198 | ×5.5 | 2.5% | Strong |
|
Wheel bearings (front)
Suspension > Wheel bearings
|
Front | 412 | ×4.7 | 5.2% | Likely |
|
Drive shafts — Joints (front)
Body, chassis, structure > Transmission > Drive shafts > Joints
|
Front | 1,694 | ×4.4 | 21.4% | Likely |
|
Rigid brake pipes (rear)
Brakes > Rigid brake pipes
|
Rear | 373 | ×4.1 | 4.7% | Likely |
|
Registration plate lamp(s) (rear)
Lamps, reflectors and electrical equipment > Registration plate lamp(s)
|
Rear | 1,230 | ×3.9 | 15.5% | Likely |
|
Wheel bearings (rear)
Suspension > Wheel bearings
|
Rear | 170 | ×3.5 | 2.1% | Likely |
|
Position lamp (rear)
Lamps, reflectors and electrical equipment > Position lamps > Position lamp
|
Rear | 479 | ×3.1 | 6.1% | Likely |
| Diesel emissions test (compression-ignition rules for vehicles from 01/07/2008) | Any | 419 | ×2.9 | 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).