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 1,497 of 1,500 failed first attempts (99.8%) that recorded an odometer reading in 2025 — the subset the age-and-mileage comparison can be computed on.
Standout: Reversing lamps — 2.8% of this year's failed first attempts
Recorded on 42 of those tests. It tops the table on elevation — about 5.3× 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 |
|---|---|---|---|---|---|
|
Reversing lamps
Lamps, reflectors and electrical equipment > Reversing lamps > Reversing lamps
|
Any | 42 | ×5.3 | 2.8% | Likely |
|
Parking brake control — Lever
Brakes > Parking brake control > Lever
|
Any | 62 | ×5.2 | 4.1% | Likely |
|
SRS malfunction indicator lamp
Seat belts and supplementary restraint systems > SRS malfunction indicator lamp
|
Any | 110 | ×4.0 | 7.3% | Likely |
|
Rbt (sp)
Brakes > Brake performance > Parking brake efficiency (sp) > Rbt (sp)
|
Any | 372 | ×4.0 | 24.8% | Likely |
|
Parking brake performance (rear)
Brakes > Brake performance > Parking brake performance > Rbt > Parking brake performance
|
Rear | 58 | ×3.3 | 3.9% | Likely |
|
Electrical equipment — Horn
Lamps, reflectors and electrical equipment > Electrical equipment > Horn
|
Any | 72 | ×3.3 | 4.8% | Likely |
|
Individual direction indicators (rear)
Lamps, reflectors and electrical equipment > Direction indicators > Flashing type > Individual direction indicators
|
Rear | 69 | ×3.0 | 4.6% | Likely |
|
Malfunction indicator lamp
Noise, emissions and leaks > Exhaust emissions > Compression ignition > Malfunction indicator lamp
|
Any | 144 | ×2.5 | 9.6% | Possible |
|
Exhaust system (rear)
Body, chassis, structure > Exhaust system
|
Rear | 35 | ×2.3 | 2.3% | Possible |
|
Rear fog lamp
Lamps, reflectors and electrical equipment > Front and rear fog lamps > Rear fog lamp > Rear fog lamp
|
Any | 46 | ×2.2 | 3.1% | 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).