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 8,230 of 8,238 failed first attempts (99.9%) that recorded an odometer reading in 2025 — the subset the age-and-mileage comparison can be computed on.
Standout: Rbt (sp) — 21.4% of this year's failed first attempts
Recorded on 1,765 of those tests. It tops the table on elevation — about 3.6× 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.
No patterns met the strongest callout thresholds on this page; showing the highest-lift rows that still cleared the display floors.
| Fault pattern | Location | Failures | vs similar cars | Share of fails | Confidence |
|---|---|---|---|---|---|
|
Rbt (sp)
Brakes > Brake performance > Parking brake efficiency (sp) > Rbt (sp)
|
Any | 1,765 | ×3.6 | 21.4% | Likely |
|
Service brake imbalance (rear)
Brakes > Brake performance > Service Brake Efficiency (sp) > Rbt (sp) > Service brake imbalance
|
Rear | 246 | ×2.5 | 3.0% | Possible |
|
Component mounting prescribed areas (rear)
Suspension > Component mounting prescribed areas
|
Rear | 640 | ×2.3 | 7.8% | Possible |
|
Rigid brake pipes (rear)
Brakes > Rigid brake pipes
|
Rear | 439 | ×2.3 | 5.3% | Possible |
|
Rigid brake pipes (front)
Brakes > Rigid brake pipes
|
Front | 200 | ×2.1 | 2.4% | Possible |
|
Linkage ball joints (front)
Suspension > Anti-roll bars > Linkage ball joints
|
Front | 468 | ×2.1 | 5.7% | 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).