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 4,232 of 4,254 failed first attempts (99.5%) that recorded an odometer reading in 2025 — the subset the age-and-mileage comparison can be computed on.
Standout: Exhaust system (rear) — 4.1% of this year's failed first attempts
Recorded on 172 of those tests. It tops the table on elevation — about 7.9× 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 |
|---|---|---|---|---|---|
|
Exhaust system (rear)
Body, chassis, structure > Exhaust system
|
Rear | 172 | ×7.9 | 4.1% | Strong |
|
Swivel pins and bushes (rear)
Suspension > Axles > Swivel pins and bushes
|
Rear | 121 | ×7.7 | 2.9% | Strong |
|
Hand lever
Brakes > Service brake pedal or hand lever > Hand lever
|
Any | 95 | ×6.5 | 2.2% | Likely |
|
Stop lamp (rear)
Lamps, reflectors and electrical equipment > Stop lamp
|
Rear | 713 | ×6.0 | 16.8% | Strong |
|
Individual direction indicators (rear)
Lamps, reflectors and electrical equipment > Direction indicators > Flashing type > Individual direction indicators
|
Rear | 112 | ×5.3 | 2.6% | Strong |
|
Parking brake control — Lever
Brakes > Parking brake control > Lever
|
Any | 134 | ×5.0 | 3.2% | Likely |
|
Emissions not tested
Noise, emissions and leaks > Exhaust emissions > Spark ignition > Emissions not tested
|
Any | 113 | ×4.9 | 2.7% | Likely |
|
Catalyst emissions
Noise, emissions and leaks > Exhaust emissions > Spark ignition > Catalyst emissions
|
Any | 377 | ×4.2 | 8.9% | Likely |
|
Rbt (sp)
Brakes > Brake performance > Parking brake efficiency (sp) > Rbt (sp)
|
Any | 360 | ×3.3 | 8.5% | Likely |
|
Position lamp (rear)
Lamps, reflectors and electrical equipment > Position lamps > Position lamp
|
Rear | 95 | ×2.1 | 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).