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 27,829 of 27,839 failed first attempts that recorded an odometer reading in 2025 — the subset the age-and-mileage comparison can be computed on.
Standout: Service brake imbalance (front) — 3.2% of this year's failed first attempts
Recorded on 891 of those tests. It tops the table on elevation — about 20× 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 |
|---|---|---|---|---|---|
|
Service brake imbalance (front)
Brakes > Brake performance > Service Brake Efficiency (sp) > Rbt (sp) > Service brake imbalance
|
Front | 891 | ×20 | 3.2% | Strong |
|
Sub-frame (front)
Suspension > Sub-frames > Sub-frame
|
Front | 638 | ×7.6 | 2.3% | Strong |
|
Macpherson strut (front)
Suspension > Macpherson strut > Macpherson strut
|
Front | 592 | ×5.2 | 2.1% | Strong |
|
Malfunction indicator lamp
Noise, emissions and leaks > Exhaust emissions > Spark ignition > Malfunction indicator lamp
|
Any | 2,358 | ×3.4 | 8.5% | Likely |
|
Shock absorbers (front)
Suspension > Shock absorbers
|
Front | 1,235 | ×2.9 | 4.4% | Possible |
|
Individual direction indicators (rear)
Lamps, reflectors and electrical equipment > Direction indicators > Flashing type > Individual direction indicators
|
Rear | 903 | ×2.8 | 3.2% | Possible |
|
Service brake performance (front)
Brakes > Brake performance > Service brake performance > Rbt > Service brake performance
|
Front | 1,060 | ×2.5 | 3.8% | Possible |
|
Coil spring (front)
Suspension > Springs > Coil springs > Coil spring
|
Front | 4,959 | ×2.4 | 17.8% | Possible |
|
Position lamp (rear)
Lamps, reflectors and electrical equipment > Position lamps > Position lamp
|
Rear | 946 | ×2.1 | 3.4% | Possible |
|
Stop lamp (rear)
Lamps, reflectors and electrical equipment > Stop lamp
|
Rear | 2,388 | ×2.0 | 8.6% | 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).