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 907 of 910 failed first attempts (99.7%) that recorded an odometer reading in 2025 — the subset the age-and-mileage comparison can be computed on.
Standout: Hydraulic brake callipers (rear) — 2.2% of this year's failed first attempts
Recorded on 20 of those tests. It tops the table on elevation — about 15× 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.
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 |
|---|---|---|---|---|---|
|
Hydraulic brake callipers (rear)
Brakes > Brake actuators (including spring brakes or hydraulic cylinders) > Hydraulic brake callipers
|
Rear | 20 | ×15 | 2.2% | Possible |
|
Prescribed areas (rear)
Seat belts and supplementary restraint systems > Seat belts > Prescribed areas
|
Rear | 61 | ×6.8 | 6.7% | Likely |
|
Integral vehicle structure condition (rear)
Body, chassis, structure > Integral vehicle structure > Integral vehicle structure condition
|
Rear | 43 | ×3.9 | 4.7% | Likely |
|
Component mounting prescribed areas (front)
Suspension > Component mounting prescribed areas
|
Front | 61 | ×3.7 | 6.7% | Likely |
|
Chassis condition (front)
Body, chassis, structure > Chassis > Chassis condition
|
Front | 37 | ×3.4 | 4.1% | Likely |
|
Parking brake performance (rear)
Brakes > Brake performance > Parking brake performance > Rbt > Parking brake performance
|
Rear | 29 | ×3.0 | 3.2% | Possible |
|
Chassis condition (rear)
Body, chassis, structure > Chassis > Chassis condition
|
Rear | 40 | ×2.4 | 4.4% | Possible |
|
Service brake performance (front)
Brakes > Brake performance > Service brake performance > Rbt > Service brake performance
|
Front | 52 | ×2.4 | 5.7% | Possible |
|
Integral vehicle structure condition (front)
Body, chassis, structure > Integral vehicle structure > Integral vehicle structure condition
|
Front | 21 | ×2.4 | 2.3% | Possible |
|
Catalyst emissions
Noise, emissions and leaks > Exhaust emissions > Spark ignition > Catalyst emissions
|
Any | 150 | ×2.4 | 16.5% | 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).