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 5,252 of 5,268 failed first attempts (99.7%) that recorded an odometer reading in 2025 — the subset the age-and-mileage comparison can be computed on.
Standout: Ball joint dust cover (front) — 6.8% of this year's failed first attempts
Recorded on 359 of those tests. It tops the table on elevation — about 3.9× 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.
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 |
|---|---|---|---|---|---|
|
Ball joint dust cover (front)
Suspension > Suspension arms > Ball joint dust cover
|
Front | 359 | ×3.9 | 6.8% | Likely |
|
Rigid brake pipes (front)
Brakes > Rigid brake pipes
|
Front | 180 | ×3.6 | 3.4% | Likely |
|
Parking brake performance (rear)
Brakes > Brake performance > Parking brake performance > Rbt > Parking brake performance
|
Rear | 151 | ×3.4 | 2.9% | Likely |
|
Rbt (sp)
Brakes > Brake performance > Parking brake efficiency (sp) > Rbt (sp)
|
Any | 784 | ×3.2 | 14.9% | Likely |
|
Anti-lock braking system
Brakes > ABS / EBS / ESC > Anti-lock braking system
|
Any | 257 | ×3.1 | 4.9% | Likely |
|
Exhaust system (front)
Body, chassis, structure > Exhaust system
|
Front | 144 | ×2.9 | 2.7% | Possible |
|
Rigid brake pipes (rear)
Brakes > Rigid brake pipes
|
Rear | 239 | ×2.8 | 4.6% | Possible |
|
Drive shafts — Joints (front)
Body, chassis, structure > Transmission > Drive shafts > Joints
|
Front | 570 | ×2.7 | 10.9% | Possible |
|
Catalyst emissions
Noise, emissions and leaks > Exhaust emissions > Spark ignition > Catalyst emissions
|
Any | 432 | ×2.4 | 8.2% | Possible |
|
Coil spring (rear)
Suspension > Springs > Coil springs > Coil spring
|
Rear | 450 | ×2.3 | 8.6% | 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).