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 1,308 of 1,311 failed first attempts (99.8%) that recorded an odometer reading in 2025 — the subset the age-and-mileage comparison can be computed on.
Standout: Malfunction indicator lamp — 14.8% of this year's failed first attempts
Recorded on 193 of those tests. It tops the table on elevation — about 5.2× more often than on similar cars of the same age and mileage. On this year it is also the commonest failure, so it answers both questions at once. The full ranked list is in the table below.
| Fault pattern | Location | Failures | vs similar cars | Share of fails | Confidence |
|---|---|---|---|---|---|
|
Chassis condition (rear)
Body, chassis, structure > Chassis > Chassis condition
|
Rear | 93 | ×57 | 7.1% | Likely |
|
Prop shafts — Joints (front)
Body, chassis, structure > Transmission > Prop shafts > Joints
|
Front | 55 | ×27 | 4.2% | Likely |
|
Fuel system — Tank
Body, chassis, structure > Fuel system > Tank
|
Any | 27 | ×18 | 2.1% | Possible |
|
Component mounting prescribed areas (rear)
Suspension > Component mounting prescribed areas
|
Rear | 77 | ×12 | 5.9% | Likely |
|
Service brake imbalance (rear)
Brakes > Brake performance > Service Brake Efficiency (sp) > Rbt (sp) > Service brake imbalance
|
Rear | 85 | ×10 | 6.5% | Likely |
|
Malfunction indicator lamp
Noise, emissions and leaks > Exhaust emissions > Compression ignition > Malfunction indicator lamp
|
Any | 193 | ×5.2 | 14.8% | Strong |
|
Emissions not tested
Noise, emissions and leaks > Exhaust emissions > Compression ignition > Emissions not tested
|
Any | 34 | ×4.2 | 2.6% | Likely |
|
SRS malfunction indicator lamp
Seat belts and supplementary restraint systems > SRS malfunction indicator lamp
|
Any | 88 | ×4.0 | 6.7% | Likely |
|
Individual direction indicators (front)
Lamps, reflectors and electrical equipment > Direction indicators > Flashing type > Individual direction indicators
|
Front | 32 | ×3.6 | 2.4% | Likely |
|
Electrical equipment — Horn
Lamps, reflectors and electrical equipment > Electrical equipment > Horn
|
Any | 61 | ×3.6 | 4.7% | 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).