| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 137 |
| Parking brake: efficiency below requirements |3.7.B.7| | 134 |
| Registration plate lamp issues | 119 |
| Windscreen wiper does not clear the windscreen effectively | 84 |
| Rear parking brake recording little or no effort | 78 |
| Brake pipe excessively corroded | 78 |
| Service brake: efficiency below requirements |3.7.B.7| | 61 |
| Offside Front position lamp|s| not working |1.1.A.3b| | 51 |
| Parking brake lever has no reserve travel |3.1.6b| | 43 |
| Nearside Front position lamp|s| not working |1.1.A.3b| | 39 |
| Horn not working |1.6.2a| | 37 |
| Brakes imbalanced across an axle | 34 |
| Nearside Stop lamp not working |1.2.1b| | 32 |
| Offside Front Track rod end ball joint has excessive play |2.2.B.1f| | 31 |
| Nearside Front Track rod end ball joint has excessive play |2.2.B.1f| | 30 |
| Registration plate issues | 25 |
| Exhaust emissions carbon monoxide content after 2nd fast idle excessive |7.3.D.3| | 25 |
| Front brake disc in such a condition that it is seriously weakened | 24 |
| Rear brake application uneven | 23 |
| Offside Track rod end ball joint has excessive play |2.2.B.1f| | 22 |
| Nearside Track rod end ball joint has excessive play |2.2.B.1f| | 21 |
| Offside Headlamp not working on dipped beam |1.7.5a| | 20 |
| Offside Stop lamp not working |1.2.1b| | 20 |
| Nearside Front Direction indicator incorrect colour |1.4.A.2f| | 20 |
| Offside Front Direction indicator incorrect colour |1.4.A.2f| | 20 |
| Nearside Headlamp not working on dipped beam |1.7.5a| | 17 |
| Centre Stop lamp not working |1.2.1b| | 17 |
| Exhaust emissions Lambda reading after 2nd fast idle outside specified limits |7.3.D.3| | 16 |
| Centre Exhaust has a major leak of exhaust gases |7.1.2| | 16 |
| Exhaust has a major leak of exhaust gases |7.1.2| | 16 |
| Nearside Front Front position lamp|s| not working |1.1.A.3b| | 16 |
| Offside Headlamp not working on main beam |1.7.5a| | 14 |
| Exhaust emissions carbon monoxide content at idle excessive |7.3.D.4| | 14 |
| Offside Rear Stop lamp not working |1.2.1b| | 13 |
| Rear brake binding | 12 |
| Nearside Headlamp not working on main beam |1.7.5a| | 11 |
| Exhaust emissions hydrocarbon content after 2nd fast idle excessive |7.3.D.3| | 11 |
| Rear Exhaust has part of the system excessively deteriorated |7.1.1a| | 11 |
| Rear Exhaust has a major leak of exhaust gases |7.1.2| | 11 |
| Front brake disc excessively pitted |3.5.1h| | 10 |
| Nearside Headlamp not in good working order adversely affecting beam image |1.2.4a| | 10 |
| Offside Front Front position lamp|s| not working |1.1.A.3b| | 10 |
| Brake pedal spongy |3.3.B.1b| | 10 |
| Offside Front Anti-roll bar linkage has excessive play in a ball joint |2.4.G.2| | 10 |
| Emissions not tested |7.0| | 9 |
| Nearside Front Anti-roll bar linkage has excessive play in a ball joint |2.4.G.2| | 9 |
| Nearside Rear Stop lamp not working |1.2.1b| | 8 |
| Nearside Front Wheel nut|s| missing |4.2.A.1e| | 8 |
| Nearside Front Headlamp not working on dipped beam |1.7.5a| | 8 |
| Nearside Headlamp aim beam image obviously incorrect |1.8.A.1b| | 8 |
| Nearside rear brake recording little or no effort |3.7.B.5a| | 7 |
| Nearside Front brake disc excessively pitted |3.5.1h| | 7 |
| Offside Front Anti-roll bar linkage insecure |2.4.G.1| | 7 |
| Exhaust has part of the system excessively deteriorated |7.1.1a| | 7 |
| Offside rear brake recording little or no effort |3.7.B.5a| | 7 |
| Nearside Front Anti-roll bar linkage has excessive play in a pin/bush |2.4.G.2| | 7 |
| Brake pedal creeps down when held under pressure |3.3.B.1a| | 7 |
| Nearside Rear Suspension spring mounting prescribed area is excessively corroded |2.4.A.3| | 7 |
| Nearside Front wheel bearing has excessive play |2.5.A.3c| | 6 |
| Nearside Rear Wheel nut|s| missing |4.2.A.1e| | 6 |
| Offside Side repeater not working |1.4.A.2c| | 6 |
| Offside Front brake disc excessively pitted |3.5.1h| | 6 |
| Nearside Headlamp excessively deteriorated so that the light output is severely reduced |1.7.5a| | 6 |
| Offside Headlamp excessively deteriorated so that the light output is severely reduced |1.7.5a| | 6 |
| Nearside Front Anti-roll bar linkage insecure |2.4.G.1| | 6 |
| Centre Exhaust system not adequately supported |7.1.1| | 6 |
| Rear Mechanical brake component has restricted free movement | 6 |
| Offside Headlamp aim beam image obviously incorrect |1.8.A.1b| | 6 |
| Offside Rear rear brake recording little or no effort |3.7.B.5a| | 6 |
| Centre Exhaust has part of the system excessively deteriorated |7.1.1a| | 6 |
| Offside Headlamp not in good working order adversely affecting beam image |1.2.4a| | 5 |
| Nearside Front Shock absorber has a serious fluid leak |2.7.3| | 5 |
| Offside Front Wheel nut|s| missing |4.2.A.1e| | 5 |
| Offside Rear Wheel nut|s| missing |4.2.A.1e| | 5 |
| Centre Rear Stop lamp not working |1.2.1b| | 5 |
| Stop lamp not working |1.2.1b| | 5 |
| Nearside Front Headlamp not in good working order adversely affecting beam image |1.2.4a| | 5 |
| Offside Headlamp aim aimed so that it dazzles other road users |1.8.A.1a| | 5 |
| Power steering malfunctioning |2.3.3a| | 5 |
| Nearside Rear wheel bearing rough when rotated |2.6.1| | 5 |
| Front brake application uneven | 5 |
| Offside Rear fog lamp not working |1.3.2b| | 4 |
| Rear fog lamp tell tale not working |1.3.1b| | 4 |
| Front Direction indicator incorrect colour |1.4.A.2f| | 4 |
| Nearside Windscreen wiper blade deteriorated |8.2.2| | 4 |
| Offside Windscreen wiper blade deteriorated |8.2.2| | 4 |
| Fuel cap/sealing device does not fasten securely by positive means |7.2.4b| | 4 |
| Brake pedal has insufficient reserve movement |3.3.A.5| | 4 |
| Nearside Rear position lamp|s| excessively deteriorated so that it is not visible from a reasonable distance |1.1.A.3d| | 4 |
| Offside Obligatory mirror seriously damaged, affecting the rear view |8.1.2a| | 4 |
| Front Exhaust has a major leak of exhaust gases |7.1.2| | 4 |
| Offside Obligatory mirror missing |8.1.1| | 4 |
| Exhaust system not adequately supported |7.1.1| | 4 |
| Offside Front constant velocity joint gaiter split |2.5.C.1a| | 4 |
| Windscreen wiper blade insecure | 4 |
| Battery insecure |1.9.1| | 4 |
| Nearside Rear rear brake recording little or no effort |3.7.B.5a| | 4 |
| Offside Front Headlamp not in good working order adversely affecting beam image |1.2.4a| | 4 |
| Service brake efficiency below requirements (1.2.2 (a) (i)) | 4 |
| Nearside Front Anti-roll bar has excessive play in a ball joint |2.4.G.2| | 4 |
| Offside Rear position lamp|s| incorrect colour |1.1.A.3e| | 3 |
| Offside Rear Shock absorber has a serious fluid leak |2.7.3| | 3 |
| Nearside Rear Braking system leaking |3.6.A.1| | 3 |
| Power steering inoperative |2.3.3a| | 3 |
| Offside Front Anti-roll bar insecure |2.4.G.1| | 3 |
| Offside Headlamp excessively damaged so that the light output is severely reduced |1.7.5a| | 3 |
| Front Direction indicators incorrect colour |1.4.A.2f| | 3 |
| Nearside Ball joint has excessive play |2.2.B.1f| | 3 |
| Offside Front Anti-roll bar linkage has excessive play in a pin/bush |2.4.G.2| | 3 |
| Nearside Headlamp insecure |1.7.3| | 3 |
| Offside Front Shock absorber has a serious fluid leak |2.7.3| | 3 |
| Upper Stop lamp not working |1.2.1b| | 3 |
| rear brakes release unevenly |3.7.B.4| | 3 |
| Windscreen has damage | 3 |
| Nearside Front Anti-roll bar has excessive play in a pin/bush |2.4.G.2| | 3 |
| Offside Front Anti-roll bar has excessive play in a pin/bush |2.4.G.2| | 3 |
| Offside Obligatory mirror insecure |8.1.1| | 3 |
| Windscreen has a sticker or other obstruction encroaching into the swept area by more than 40mm outside zone `A` |8.3.1e| | 3 |
| Nearside Front Anti-roll bar linkage fractured |2.4.G.1| | 3 |
| Offside Front Anti-roll bar linkage fractured |2.4.G.1| | 3 |
| Nearside Rear Shock absorber has a serious fluid leak |2.7.3| | 3 |
| front brakes release unevenly |3.7.B.4| | 3 |
| Offside Front wheel bearing has excessive play |2.5.A.3c| | 3 |
| Stop lamp remains on when the brakes are released | 3 |
| Supplementary Restraint System warning lamp indicates a fault |5.4.2| | 3 |
| Offside Headlamp insecure |1.7.3| | 3 |
| Nearside Seat belt anchorage prescribed area is excessively corroded |5.2.6| | 3 |
| Nearside Rear Suspension component mounting prescribed area is excessively corroded |2.4.A.3| | 3 |
| Offside Front Anti-roll bar has excessive play in a ball joint |2.4.G.2| | 3 |
| Nearside Front Headlamp excessively deteriorated so that the light output is severely reduced |1.7.5a| | 3 |
| Offside Front Headlamp excessively deteriorated so that the light output is severely reduced |1.7.5a| | 3 |
| Rear Exhaust system not adequately supported |7.1.1| | 3 |
| Nearside Front Braking system leaking |3.6.A.1| | 3 |
| Offside Front Anti-roll bar linkage ball joint dust cover excessively damaged so that it no longer prevents the ingress of dirt |2.4.G.2| | 3 |
| Nearside Front Headlamp aim beam image obviously incorrect |1.8.A.1b| | 3 |
| Offside Rear Suspension component mounting prescribed area is excessively corroded |2.4.A.3| | 3 |