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 4,688 of 4,693 failed first attempts (99.9%) that recorded an odometer reading in 2025 — the subset the age-and-mileage comparison can be computed on.
Standout: Swivel pins and bushes (rear) — 4.6% of this year's failed first attempts
Recorded on 217 of those tests. It tops the table on elevation — about 14× 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 |
|---|---|---|---|---|---|
|
Swivel pins and bushes (rear)
Suspension > Axles > Swivel pins and bushes
|
Rear | 217 | ×14 | 4.6% | Strong |
|
Sub-frame mounting prescribed areas (front)
Suspension > Sub-frames > Sub-frame mounting prescribed areas
|
Front | 196 | ×13 | 4.2% | Strong |
|
Electrical equipment — Horn
Lamps, reflectors and electrical equipment > Electrical equipment > Horn
|
Any | 257 | ×4.0 | 5.5% | Likely |
|
Malfunction indicator lamp
Noise, emissions and leaks > Exhaust emissions > Spark ignition > Malfunction indicator lamp
|
Any | 756 | ×3.5 | 16.1% | Likely |
|
Catalyst emissions
Noise, emissions and leaks > Exhaust emissions > Spark ignition > Catalyst emissions
|
Any | 630 | ×2.7 | 13.4% | Possible |
|
Seat belts — Condition (rear)
Seat belts and supplementary restraint systems > Seat belts > Condition
|
Rear | 104 | ×2.5 | 2.2% | 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).