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 4,202 of 4,211 failed first attempts (99.8%) that recorded an odometer reading in 2025 — the subset the age-and-mileage comparison can be computed on.
Standout: Seat belts — Condition (front) — 3.6% of this year's failed first attempts
Recorded on 153 of those tests. It tops the table on elevation — about 16× 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 |
|---|---|---|---|---|---|
|
Seat belts — Condition (front)
Seat belts and supplementary restraint systems > Seat belts > Condition
|
Front | 153 | ×16 | 3.6% | Strong |
|
Parking brake performance (rear)
Brakes > Brake performance > Parking brake performance > Rbt > Parking brake performance
|
Rear | 176 | ×5.6 | 4.2% | Strong |
|
Rbt (sp)
Brakes > Brake performance > Parking brake efficiency (sp) > Rbt (sp)
|
Any | 898 | ×5.4 | 21.4% | Strong |
|
Rigid brake pipes (rear)
Brakes > Rigid brake pipes
|
Rear | 197 | ×3.0 | 4.7% | Possible |
|
Catalyst emissions
Noise, emissions and leaks > Exhaust emissions > Spark ignition > Catalyst emissions
|
Any | 354 | ×2.8 | 8.4% | Possible |
|
Rigid brake pipes (front)
Brakes > Rigid brake pipes
|
Front | 91 | ×2.4 | 2.2% | Possible |
|
Ball joint dust cover (front)
Suspension > Suspension arms > Ball joint dust cover
|
Front | 160 | ×2.3 | 3.8% | Possible |
|
Emissions not tested
Noise, emissions and leaks > Exhaust emissions > Spark ignition > Emissions not tested
|
Any | 114 | ×2.3 | 2.7% | 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).