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 754 failed first attempts in 2025 that the age-and-mileage comparison can be computed on.
Standout: Decelerometer (sp) — 5.0% of this year's failed first attempts
Recorded on 38 of those tests. It tops the table on elevation — about 48× 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 |
|---|---|---|---|---|---|
|
Decelerometer (sp)
Brakes > Brake performance > Parking brake efficiency (sp) > Decelerometer (sp)
|
Any | 38 | ×48 | 5.0% | Likely |
|
Pins and bushes (front)
Suspension > Anti-roll bars > Pins and bushes
|
Front | 71 | ×39 | 9.4% | Likely |
|
Steering rack
Steering > Steering gear > Steering rack
|
Any | 27 | ×22 | 3.6% | Possible |
|
Service brake imbalance (rear)
Brakes > Brake performance > Service Brake Efficiency (sp) > Rbt (sp) > Service brake imbalance
|
Rear | 24 | ×6.0 | 3.2% | Possible |
|
Shock absorbers (rear)
Suspension > Shock absorbers
|
Rear | 81 | ×4.6 | 10.7% | Likely |
|
Anti-lock braking system
Brakes > ABS / EBS / ESC > Anti-lock braking system
|
Any | 45 | ×4.2 | 6.0% | Likely |
|
Service brake performance (rear)
Brakes > Brake performance > Service brake performance > Rbt > Service brake performance
|
Rear | 61 | ×4.1 | 8.1% | Likely |
|
Parking brake performance (rear)
Brakes > Brake performance > Parking brake performance > Rbt > Parking brake performance
|
Rear | 31 | ×4.1 | 4.1% | Likely |
|
Parking brake control — Lever
Brakes > Parking brake control > Lever
|
Any | 23 | ×4.0 | 3.1% | Possible |
|
Rear fog lamp
Lamps, reflectors and electrical equipment > Front and rear fog lamps > Rear fog lamp > Rear fog lamp
|
Any | 34 | ×3.8 | 4.5% | 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).