| Most common failures | No# failures |
|---|
| Brake pipe excessively corroded | 3687 |
| Exhaust emissions carbon monoxide content after 2nd fast idle excessive |7.3.D.3| | 2228 |
| Windscreen wiper does not clear the windscreen effectively | 2028 |
| Headlamp aim out of alignment | 1990 |
| Exhaust emissions Lambda reading after 2nd fast idle outside specified limits |7.3.D.3| | 1592 |
| Registration plate lamp issues | 1547 |
| Exhaust emissions carbon monoxide content at idle excessive |7.3.D.4| | 1144 |
| Exhaust emissions hydrocarbon content after 2nd fast idle excessive |7.3.D.3| | 1022 |
| Nearside Stop lamp not working |1.2.1b| | 675 |
| Offside Stop lamp not working |1.2.1b| | 639 |
| Brakes imbalanced across an axle | 616 |
| Nearside Front position lamp|s| not working |1.1.A.3b| | 590 |
| Registration plate issues | 515 |
| Offside Front Direction indicator incorrect colour |1.4.A.2f| | 487 |
| Offside Front position lamp|s| not working |1.1.A.3b| | 485 |
| Nearside Front Direction indicator incorrect colour |1.4.A.2f| | 445 |
| Parking brake lever has no reserve travel |3.1.6b| | 435 |
| Exhaust has a major leak of exhaust gases |7.1.2| | 397 |
| Front Exhaust system not adequately supported |7.1.1| | 368 |
| Rear Exhaust has a major leak of exhaust gases |7.1.2| | 363 |
| Centre Exhaust has a major leak of exhaust gases |7.1.2| | 362 |
| Rear fog lamp switch faulty |1.3.1a| | 342 |
| Parking brake: efficiency below requirements |3.7.B.7| | 340 |
| Emissions not tested |7.0| | 283 |
| Offside Rear Stop lamp not working |1.2.1b| | 276 |
| Nearside Rear Stop lamp not working |1.2.1b| | 262 |
| Nearside Headlamp not working on dipped beam |1.7.5a| | 257 |
| Offside Rear fog lamp not working |1.3.2b| | 256 |
| Offside Headlamp not working on dipped beam |1.7.5a| | 214 |
| Front brake disc in such a condition that it is seriously weakened | 194 |
| Nearside Front Front position lamp|s| not working |1.1.A.3b| | 184 |
| Exhaust system not adequately supported |7.1.1| | 173 |
| Service brake: efficiency below requirements |3.7.B.7| | 162 |
| Rear parking brake recording little or no effort | 156 |
| Offside Front Front position lamp|s| not working |1.1.A.3b| | 154 |
| Windscreen has damage | 147 |
| Rear brake application uneven | 139 |
| Rear Exhaust system not adequately supported |7.1.1| | 137 |
| Front brake application uneven | 137 |
| Brake hose excessively deteriorated | 127 |
| Offside Front Headlamp not working on dipped beam |1.7.5a| | 117 |
| Offside Obligatory mirror seriously damaged, affecting the rear view |8.1.2a| | 117 |
| Nearside Front Headlamp not working on dipped beam |1.7.5a| | 114 |
| Windscreen wiper blade insecure | 112 |
| Offside Front Direction indicators incorrect colour |1.4.A.2f| | 111 |
| Offside Front constant velocity joint gaiter insecurely mounted to its housing |2.5.C.1a| | 109 |
| Nearside Front Suspension arm has excessive play in a ball joint |2.4.G.2| | 108 |
| Nearside Front Direction indicators incorrect colour |1.4.A.2f| | 108 |
| Offside Front Suspension arm has excessive play in a ball joint |2.4.G.2| | 103 |
| Nearside Windscreen wiper blade deteriorated |8.2.2| | 101 |
| Nearside Rear Trailing arm rubber bush deteriorated resulting in excessive movement |2.4.G.2| | 97 |
| Nearside Front constant velocity joint gaiter insecurely mounted to its housing |2.5.C.1a| | 94 |
| Offside Rear Trailing arm rubber bush deteriorated resulting in excessive movement |2.4.G.2| | 93 |
| Rear fog lamp tell tale not working |1.3.1b| | 92 |
| Offside Front Windscreen wiper blade deteriorated |8.2.2| | 91 |
| Nearside Headlamp not in good working order adversely affecting beam image |1.2.4a| | 91 |
| Offside Windscreen wiper blade deteriorated |8.2.2| | 89 |
| Rear fog lamp not working |1.3.2b| | 89 |
| Nearside Rear Anti-roll bar has excessive play in a pin/bush |2.4.G.2| | 89 |
| Nearside Front Windscreen wiper blade deteriorated |8.2.2| | 81 |
| Offside Front suspension has excessive play in a lower suspension ball joint |2.5.B.1a| | 81 |
| Nearside Rear Anti-roll bar rubber bush deteriorated resulting in excessive movement |2.4.G.2| | 79 |
| Offside Rear Anti-roll bar has excessive play in a pin/bush |2.4.G.2| | 75 |
| Offside Rear position lamp|s| excessively deteriorated so that it is not visible from a reasonable distance |1.1.A.3d| | 73 |
| Nearside Front Lower Suspension arm has excessive play in a ball joint |2.4.G.2| | 71 |
| Front Exhaust has a major leak of exhaust gases |7.1.2| | 68 |
| Offside Front Lower Suspension arm has excessive play in a ball joint |2.4.G.2| | 68 |
| Windscreen has a sticker or other obstruction encroaching into the swept area by more than 40mm outside zone `A` |8.3.1e| | 67 |
| Rear brake binding | 67 |
| Nearside Front suspension has excessive play in a lower suspension ball joint |2.5.B.1a| | 67 |
| Offside Rear Rear fog lamp not working |1.3.2b| | 65 |
| Front Direction indicator incorrect colour |1.4.A.2f| | 64 |
| Nearside Front Track rod end ball joint has excessive play |2.2.B.1f| | 63 |
| Offside Headlamp not in good working order adversely affecting beam image |1.2.4a| | 62 |
| Nearside Rear position lamp|s| excessively deteriorated so that it is not visible from a reasonable distance |1.1.A.3d| | 61 |
| Exhaust has part of the system excessively deteriorated |7.1.1a| | 60 |
| Nearside Track rod end ball joint has excessive play |2.2.B.1f| | 59 |
| Offside Track rod end ball joint has excessive play |2.2.B.1f| | 59 |
| Offside Rear Anti-roll bar rubber bush deteriorated resulting in excessive movement |2.4.G.2| | 58 |
| Stop lamp not working |1.2.1b| | 57 |
| Centre Exhaust has part of the system excessively deteriorated |7.1.1a| | 55 |
| Rear Exhaust has part of the system excessively deteriorated |7.1.1a| | 55 |
| Rear fog lamp switch missing |1.3.1a| | 54 |
| Offside Front Track rod end ball joint has excessive play |2.2.B.1f| | 54 |
| Offside Headlamp aim beam image obviously incorrect |1.8.A.1b| | 53 |
| Fuel cap/sealing device does not fasten securely maintaining the sealing arrangement |7.2.4b| | 52 |
| Centre Exhaust system not adequately supported |7.1.1| | 52 |
| Offside rear brake recording little or no effort |3.7.B.5a| | 50 |
| Nearside rear brake recording little or no effort |3.7.B.5a| | 49 |
| Nearside Headlamp aim beam image obviously incorrect |1.8.A.1b| | 48 |
| Nearside Front Headlamp not in good working order adversely affecting beam image |1.2.4a| | 47 |
| Nearside Front Anti-roll bar linkage has excessive play in a ball joint |2.4.G.2| | 45 |
| Front Exhaust mounting missing |7.1.1b| | 45 |
| Offside Front Shock absorber has a serious fluid leak |2.7.3| | 43 |
| Offside Front Front constant velocity joint gaiter insecurely mounted to its housing |2.5.C.1a| | 42 |
| Nearside Rear Direction indicator incorrect colour |1.4.A.2f| | 42 |
| Nearside Front Shock absorber has a serious fluid leak |2.7.3| | 41 |
| Nearside Front Front constant velocity joint gaiter insecurely mounted to its housing |2.5.C.1a| | 40 |
| Offside Front Front suspension has excessive play in a lower suspension ball joint |2.5.B.1a| | 40 |
| Horn not working |1.6.2a| | 40 |
| Battery insecure |1.9.1| | 40 |
| Offside Steering rack gaiter split |2.2.D.2d| | 39 |
| Offside Rear Direction indicator incorrect colour |1.4.A.2f| | 38 |
| Rear Rear fog lamp not working |1.3.2b| | 38 |
| Nearside Rear Suspension arm rubber bush deteriorated resulting in excessive movement |2.4.G.2| | 38 |
| Exhaust tailpipe not capable of allowing the emission probe to be inserted |7.3.D.1| | 38 |