| Most common failures | No# failures |
|---|
| Brake pipe excessively corroded | 231 |
| Headlamp aim out of alignment | 220 |
| Registration plate lamp issues | 199 |
| Windscreen wiper does not clear the windscreen effectively | 172 |
| Exhaust emissions carbon monoxide content after 2nd fast idle excessive |7.3.D.3| | 100 |
| Offside Front position lamp|s| not working |1.1.A.3b| | 86 |
| Nearside Front position lamp|s| not working |1.1.A.3b| | 82 |
| Exhaust emissions Lambda reading after 2nd fast idle outside specified limits |7.3.D.3| | 66 |
| Registration plate issues | 61 |
| Exhaust emissions carbon monoxide content at idle excessive |7.3.D.4| | 59 |
| Offside Front Direction indicator incorrect colour |1.4.A.2f| | 56 |
| Nearside Front Direction indicator incorrect colour |1.4.A.2f| | 55 |
| Nearside Stop lamp not working |1.2.1b| | 39 |
| Offside Stop lamp not working |1.2.1b| | 36 |
| Brakes imbalanced across an axle | 32 |
| Rear parking brake recording little or no effort | 29 |
| Exhaust emissions hydrocarbon content after 2nd fast idle excessive |7.3.D.3| | 28 |
| Offside Front Front position lamp|s| not working |1.1.A.3b| | 28 |
| Anti-lock braking system warning lamp indicates an ABS fault | 26 |
| Parking brake: efficiency below requirements |3.7.B.7| | 26 |
| Exhaust has a major leak of exhaust gases |7.1.2| | 24 |
| Nearside Front Front position lamp|s| not working |1.1.A.3b| | 22 |
| Rear brake binding | 21 |
| Offside Rear Stop lamp not working |1.2.1b| | 21 |
| Nearside Headlamp not in good working order adversely affecting beam image |1.2.4a| | 21 |
| Offside Rear fog lamp not working |1.3.2b| | 17 |
| Offside Headlamp not in good working order adversely affecting beam image |1.2.4a| | 17 |
| Rear Exhaust has a major leak of exhaust gases |7.1.2| | 17 |
| Nearside Rear position lamp|s| excessively deteriorated so that it is not visible from a reasonable distance |1.1.A.3d| | 16 |
| Offside Rear position lamp|s| excessively deteriorated so that it is not visible from a reasonable distance |1.1.A.3d| | 16 |
| Emissions not tested |7.0| | 16 |
| Centre Exhaust has a major leak of exhaust gases |7.1.2| | 15 |
| Nearside Rear Stop lamp not working |1.2.1b| | 15 |
| Nearside Headlamp not working on dipped beam |1.7.5a| | 15 |
| Nearside Rear Suspension component mounting prescribed area is excessively corroded |2.4.A.3| | 15 |
| Offside Headlamp not working on dipped beam |1.7.5a| | 14 |
| Offside Rear position lamp|s| not working |1.1.A.3b| | 13 |
| Nearside Front Direction indicators incorrect colour |1.4.A.2f| | 13 |
| Fuel tank leaking |7.2.3| | 13 |
| Offside Rear Suspension component mounting prescribed area is excessively corroded |2.4.A.3| | 13 |
| Nearside rear brake recording little or no effort |3.7.B.5a| | 12 |
| Offside Front Direction indicators incorrect colour |1.4.A.2f| | 12 |
| Horn not working |1.6.2a| | 12 |
| Offside Front Suspension arm rubber bush deteriorated resulting in excessive movement |2.4.G.2| | 11 |
| Nearside Rear position lamp|s| not working |1.1.A.3b| | 10 |
| Nearside Front Suspension arm rubber bush deteriorated resulting in excessive movement |2.4.G.2| | 10 |
| Windscreen wiper blade insecure | 10 |
| Service brake: efficiency below requirements |3.7.B.7| | 10 |
| Windscreen has a sticker or other obstruction encroaching into the swept area by more than 40mm outside zone `A` |8.3.1e| | 10 |
| Offside Obligatory mirror insecure |8.1.1| | 9 |
| Nearside Headlamp aim aimed so that it dazzles other road users |1.8.A.1a| | 8 |
| Nearside Front position lamp|s| not in good working order |function impaired| |1.1.4a| | 8 |
| Brake hose excessively deteriorated | 8 |
| Nearside Front suspension has excessive play in a lower suspension ball joint |2.5.B.1a| | 8 |
| Rear brake application uneven | 7 |
| Exhaust carbon monoxide content after 2nd fast idle exceeds manufacturers specified limits (8.2.1.2 (a)) | 7 |
| Nearside Front Headlamp not in good working order adversely affecting beam image |1.2.4a| | 7 |
| Windscreen has damage | 7 |
| Offside Front Lower Suspension arm has excessive play in a ball joint |2.4.G.2| | 7 |
| Brake hydraulic reservoir fluid level below minimum level |3.6.G.1b| | 7 |
| Offside Rear Rear fog lamp not working |1.3.2b| | 7 |
| Nearside Windscreen wiper blade deteriorated |8.2.2| | 7 |
| Indicator switch faulty |1.4.A.1| | 6 |
| Nearside Front Lower Suspension arm has excessive play in a ball joint |2.4.G.2| | 6 |
| Front position lamp|s| not working |1.1.A.3b| | 6 |
| Offside Windscreen wiper blade deteriorated |8.2.2| | 6 |
| Offside Front position lamp|s| not in good working order |function impaired| |1.1.4a| | 6 |
| Offside Front Headlamp not working on dipped beam |1.7.5a| | 6 |
| Offside Headlamp aim beam image obviously incorrect |1.8.A.1b| | 6 |
| Offside Obligatory mirror seriously damaged, affecting the rear view |8.1.2a| | 6 |
| Exhaust Lambda reading after 2nd fast idle outside specified limits (8.2.1.2 (c)) | 5 |
| Nearside Front Headlamp not working on dipped beam |1.7.5a| | 5 |
| Nearside Front Suspension arm has excessive play in a ball joint |2.4.G.2| | 5 |
| Offside Front Headlamp not in good working order adversely affecting beam image |1.2.4a| | 5 |
| Offside Rear Anti-roll bar linkage has excessive play in a ball joint |2.4.G.2| | 5 |
| Nearside Rear Shock absorber has a serious fluid leak |2.7.3| | 5 |
| Centre Stop lamp not working |1.2.1b| | 5 |
| Front Direction indicator incorrect colour |1.4.A.2f| | 5 |
| Nearside Headlamp not working on main beam |1.7.5a| | 5 |
| Offside Front Windscreen wiper blade deteriorated |8.2.2| | 5 |
| Front Front position lamp|s| not working |1.1.A.3b| | 5 |
| Steering rack insecure |2.2.B.1a| | 5 |
| Fuel cap/sealing device does not fasten securely maintaining the sealing arrangement |7.2.4b| | 5 |
| Nearside Headlamp aim beam image obviously incorrect |1.8.A.1b| | 5 |
| Front brake disc in such a condition that it is seriously weakened | 5 |
| Nearside Front Shock absorber has a serious fluid leak |2.7.3| | 4 |
| Nearside Rear Anti-roll bar rubber bush deteriorated resulting in excessive movement |2.4.G.2| | 4 |
| Exhaust carbon monoxide content after 2nd fast idle exceeds default limits |8.2.1.2 |b|| | 4 |
| Offside Front Wheel nut|s| missing |4.2.A.1e| | 4 |
| Offside Front suspension has excessive play in a lower suspension ball joint |2.5.B.1a| | 4 |
| Offside Rear Rear position lamp|s| not working |1.1.A.3b| | 4 |
| Parking brake lever has no reserve travel |3.1.6b| | 4 |
| Rear fog lamp tell tale not working |1.3.1b| | 4 |
| Front Direction indicators incorrect colour |1.4.A.2f| | 4 |
| Nearside Rear Rear wheel bearing rough when rotated |2.6.1| | 4 |
| Offside Front Shock absorber has negligible damping effect |2.7.5| | 4 |
| Offside Front Suspension arm has excessive play in a ball joint |2.4.G.2| | 4 |
| Offside Headlamp not working on main beam |1.7.5a| | 4 |
| Nearside Rear wheel bearing rough when rotated |2.6.1| | 4 |
| Offside Obligatory mirror missing |8.1.1| | 4 |
| Rear Suspension component mounting prescribed area is excessively corroded |2.4.A.3| | 4 |