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 1,031 of 1,035 failed first attempts (99.6%) that recorded an odometer reading in 2025 — the subset the age-and-mileage comparison can be computed on.
Standout: Electrical equipment — Horn — 10.0% of this year's failed first attempts
Recorded on 103 of those tests. It tops the table on elevation — about 6.1× 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 |
|---|---|---|---|---|---|
|
Load sensing valves (rear)
Brakes > Load sensing valves
|
Rear | 74 | ×22 | 7.2% | Likely |
|
Electrical equipment — Horn
Lamps, reflectors and electrical equipment > Electrical equipment > Horn
|
Any | 103 | ×6.1 | 10.0% | Strong |
|
Door condition (rear)
Body, chassis, structure > Doors > Other passenger's door > Door condition
|
Rear | 37 | ×5.7 | 3.6% | Likely |
|
Side repeaters
Lamps, reflectors and electrical equipment > Direction indicators > Flashing type > Side repeaters
|
Any | 68 | ×4.0 | 6.6% | Likely |
|
SRS malfunction indicator lamp
Seat belts and supplementary restraint systems > SRS malfunction indicator lamp
|
Any | 116 | ×3.7 | 11.3% | Likely |
|
Service brake performance
Brakes > Brake performance > Service Brake Efficiency (sp) > Rbt (sp) > Service brake performance
|
Any | 69 | ×3.6 | 6.7% | Likely |
|
Emissions not tested
Noise, emissions and leaks > Exhaust emissions > Compression ignition > Emissions not tested
|
Any | 23 | ×3.0 | 2.2% | Possible |
|
Headlamp levelling device
Lamps, reflectors and electrical equipment > Headlamps > Headlamp levelling device
|
Any | 22 | ×2.5 | 2.1% | Possible |
|
Coil spring (front)
Suspension > Springs > Coil springs > Coil spring
|
Front | 64 | ×2.3 | 6.2% | 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).