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 1,397 of 1,402 failed first attempts (99.6%) that recorded an odometer reading in 2025 — the subset the age-and-mileage comparison can be computed on.
Standout: Outline marker lamp (front) — 3.2% of this year's failed first attempts
Recorded on 45 of those tests. It tops the table on elevation — about 38× 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 |
|---|---|---|---|---|---|
|
Outline marker lamp (front)
Lamps, reflectors and electrical equipment > Outline marker lamps > Outline marker lamp
|
Front | 45 | ×38 | 3.2% | Likely |
|
Outline marker lamp (rear)
Lamps, reflectors and electrical equipment > Outline marker lamps > Outline marker lamp
|
Rear | 53 | ×33 | 3.8% | Likely |
|
Malfunction indicator lamp
Noise, emissions and leaks > Exhaust emissions > Compression ignition > Malfunction indicator lamp
|
Any | 48 | ×6.6 | 3.4% | Likely |
|
Integral vehicle structure condition (front)
Body, chassis, structure > Integral vehicle structure > Integral vehicle structure condition
|
Front | 34 | ×6.5 | 2.4% | Likely |
| Diesel emissions test (pre-reg turbo rules before 01/07/2008) | Any | 60 | ×4.7 | 4.3% | Likely |
|
Chassis condition (front)
Body, chassis, structure > Chassis > Chassis condition
|
Front | 30 | ×4.6 | 2.1% | Likely |
|
Component mounting prescribed areas (front)
Suspension > Component mounting prescribed areas
|
Front | 42 | ×4.0 | 3.0% | Likely |
|
Service brake performance
Brakes > Brake performance > Service Brake Efficiency (sp) > Rbt (sp) > Service brake performance
|
Any | 35 | ×3.3 | 2.5% | Likely |
|
Service brake performance (front)
Brakes > Brake performance > Service brake performance > Rbt > Service brake performance
|
Front | 109 | ×3.3 | 7.8% | Likely |
|
Side repeaters
Lamps, reflectors and electrical equipment > Direction indicators > Flashing type > Side repeaters
|
Any | 51 | ×3.1 | 3.7% | 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).