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 2,378 of 2,411 failed first attempts (98.6%) that recorded an odometer reading in 2025 — the subset the age-and-mileage comparison can be computed on.
Standout: Service brake imbalance (rear) — 10.8% of this year's failed first attempts
Recorded on 256 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 |
|---|---|---|---|---|---|
|
Service brake imbalance (rear)
Brakes > Brake performance > Service Brake Efficiency (sp) > Rbt (sp) > Service brake imbalance
|
Rear | 256 | ×3.6 | 10.8% | Likely |
|
Wheel bearings (rear)
Suspension > Wheel bearings
|
Rear | 97 | ×3.3 | 4.1% | Likely |
|
Ball joint dust cover (front)
Suspension > Suspension arms > Ball joint dust cover
|
Front | 129 | ×2.7 | 5.4% | Possible |
|
Prescribed areas
Seat belts and supplementary restraint systems > Seat belts > Prescribed areas
|
Any | 48 | ×2.5 | 2.0% | Possible |
|
Flexible brake hoses (rear)
Brakes > Flexible brake hoses
|
Rear | 50 | ×2.4 | 2.1% | Possible |
|
Shock absorbers (rear)
Suspension > Shock absorbers
|
Rear | 94 | ×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).