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 1,427 of 1,428 failed first attempts (99.9%) that recorded an odometer reading in 2025 — the subset the age-and-mileage comparison can be computed on.
Standout: Chassis condition (rear) — 8.0% of this year's failed first attempts
Recorded on 114 of those tests. It tops the table on elevation — about 69× 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 |
|---|---|---|---|---|---|
|
Chassis condition (rear)
Body, chassis, structure > Chassis > Chassis condition
|
Rear | 114 | ×69 | 8.0% | Strong |
|
Spring mounting prescribed areas (rear)
Suspension > Springs > Spring mounting prescribed areas
|
Rear | 33 | ×62 | 2.3% | Likely |
|
Chassis condition (front)
Body, chassis, structure > Chassis > Chassis condition
|
Front | 39 | ×42 | 2.7% | Likely |
|
Leaf spring (rear)
Suspension > Springs > Leaf springs > Leaf spring
|
Rear | 56 | ×27 | 3.9% | Likely |
|
Component mounting prescribed areas (rear)
Suspension > Component mounting prescribed areas
|
Rear | 92 | ×14 | 6.4% | Likely |
|
Service brake performance
Brakes > Brake performance > Service Brake Efficiency (sp) > Rbt (sp) > Service brake performance
|
Any | 54 | ×6.0 | 3.8% | Likely |
|
Service brake imbalance (front)
Brakes > Brake performance > Service brake performance > Rbt > Service brake imbalance
|
Front | 30 | ×5.9 | 2.1% | Likely |
|
Service brake imbalance (rear)
Brakes > Brake performance > Service Brake Efficiency (sp) > Rbt (sp) > Service brake imbalance
|
Rear | 52 | ×5.5 | 3.6% | Likely |
|
Rigid brake pipes (rear)
Brakes > Rigid brake pipes
|
Rear | 86 | ×5.1 | 6.0% | Likely |
|
Rigid brake pipes (front)
Brakes > Rigid brake pipes
|
Front | 46 | ×4.5 | 3.2% | 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).