| Most common failures | No# failures |
|---|
| Windscreen wiper does not clear the windscreen effectively | 676 |
| Headlamp aim out of alignment | 470 |
| Registration plate lamp issues | 418 |
| Brake pipe excessively corroded | 198 |
| Exhaust emits an excessive level of metered smoke |7.4.B.3a| | 122 |
| Anti-lock braking system warning lamp indicates an ABS fault | 104 |
| Nearside Front Anti-roll bar linkage has excessive play in a pin/bush |2.4.G.2| | 77 |
| Brakes imbalanced across an axle | 73 |
| Nearside Front Position lamp not working (4.2.1 (a) (ii)) | 73 |
| Nearside Front position lamp|s| not working |1.1.A.3b| | 73 |
| Offside Front Anti-roll bar linkage has excessive play in a pin/bush |2.4.G.2| | 70 |
| Registration plate issues | 69 |
| Offside Front Position lamp not working (4.2.1 (a) (ii)) | 63 |
| Nearside Front Anti-roll bar linkage pin or bush excessively worn (5.3.4 (a) (i)) | 59 |
| Offside Front position lamp|s| not working |1.1.A.3b| | 58 |
| Offside Front Anti-roll bar linkage pin or bush excessively worn (5.3.4 (a) (i)) | 54 |
| Exhaust emissions exceed manufacturers specified limit (8.2.2.2 (a)) | 48 |
| Offside Stop lamp not working |1.2.1b| | 44 |
| Windscreen has damage | 43 |
| Nearside Stop lamp not working |1.2.1b| | 39 |
| Offside Front Anti-roll bar linkage rubber bush deteriorated resulting in excessive movement |2.4.G.2| | 35 |
| Nearside Front Anti-roll bar linkage rubber bush deteriorated resulting in excessive movement |2.4.G.2| | 32 |
| Exhaust emissions exceed default limit of 1.5m-1 (8.2.2.2 (b)) | 32 |
| Nearside Rear Stop lamp(s) not working (4.3.1 (a) (ii)) | 31 |
| Brake pedal anti-slip provision missing |3.3.A.1b| | 29 |
| Offside Stop lamp(s) not working (4.3.1 (a) (ii)) | 28 |
| Offside Front Front position lamp|s| not working |1.1.A.3b| | 26 |
| Nearside Front Position lamp not working |4.2.1 |a|| | 25 |
| Parking brake lever has no reserve travel |3.1.6b| | 25 |
| Nearside Front Anti-roll bar linkage pin or bush excessively worn |5.3.4 |a| |i|| | 24 |
| Offside Front Anti-roll bar linkage pin or bush excessively worn |5.3.4 |a| |i|| | 24 |
| Nearside Rear Stop lamp not working |1.2.1b| | 23 |
| Nearside Front Anti-roll bar has excessive play in a pin/bush |2.4.G.2| | 23 |
| Nearside Front Front position lamp|s| not working |1.1.A.3b| | 22 |
| Offside Front Anti-roll bar has excessive play in a pin/bush |2.4.G.2| | 21 |
| Offside Rear Stop lamp not working |1.2.1b| | 20 |
| Offside Rear Stop lamp(s) not working (4.3.1 (a) (ii)) | 19 |
| Offside Front Position lamp not working |4.2.1 |a|| | 19 |
| Exhaust emissions exceed default limit of 1.5m-1 |8.2.2.2 |b|| | 17 |
| Engine MIL inoperative or indicates a malfunction (8.2.2.2 (g)) | 17 |
| Nearside Front Anti-roll bar linkage rubber mounting deteriorated resulting in excessive movement |2.4.G.2| | 17 |
| Offside Front Anti-roll bar linkage rubber mounting deteriorated resulting in excessive movement |2.4.G.2| | 17 |
| Parking brake efficiency below requirements (1.4.2 (a) (i)) | 15 |
| Horn not working |1.6.2a| | 15 |
| Nearside Stop lamp(s) not working (4.3.1 (a) (ii)) | 15 |
| Nearside Front Anti-roll bar rubber bush deteriorated resulting in excessive movement |2.4.G.2| | 15 |
| Offside Front Anti-roll bar rubber bush deteriorated resulting in excessive movement |2.4.G.2| | 14 |
| Brake pedal anti-slip provision missing (1.1.2 (c)) | 14 |
| Nearside Front Upper Suspension arm ball joint excessively worn (5.3.4 (a) (i)) | 14 |
| Windscreen washer not working | 13 |
| Nearside Stop lamp|s| not working |4.3.1 |a| |ii|| | 12 |
| Offside Stop lamp|s| not working |4.3.1 |a| |ii|| | 11 |
| Front brake application uneven | 11 |
| Parking brake lever has excessive movement indicating incorrect adjustment (1.1.6 (c)) | 11 |
| Nearside Front Shock absorbers has an excessively worn bush (5.3.2 (c)) | 11 |
| Exhaust emissions test not completed because smoke levels are significantly in excess of the specified limit values (8.2.2.2 (f)) | 11 |
| Offside Rear fog lamp not working |1.3.2b| | 10 |
| Parking brake: efficiency below requirements |3.7.B.7| | 10 |
| Stop lamp(s) all not working (4.3.1 (a) (iii)) | 10 |
| Exhaust emissions exceed manufacturer`s specified limit |8.2.2.2 |a|| | 10 |
| Offside Front Anti-roll bar linkage fractured (5.3.3 (b) (ii)) | 10 |
| Windscreen has a sticker or other obstruction encroaching into the swept area by more than 40mm outside zone `A` |8.3.1e| | 9 |
| Offside Rear Stop lamp|s| not working |4.3.1 |a| |ii|| | 9 |
| Nearside Rear Position lamp not working (4.2.1 (a) (ii)) | 9 |
| Windscreen wiper blade insecure | 8 |
| Front brake excessively fluctuating | 8 |
| Exhaust emits excessive smoke or vapour likely to obscure the vision of other road users (8.2.2.2 (c)) | 8 |
| Engine MIL inoperative or indicates a malfunction (8.2.1.2 (h)) | 8 |
| Service brake efficiency below requirements (1.2.2 (a) (i)) | 8 |
| Rear fog lamp not working |1.3.2b| | 8 |
| Offside Rear Position lamp not working (4.2.1 (a) (ii)) | 8 |
| Nearside Front Upper Suspension arm has excessive play in a ball joint |2.4.G.2| | 8 |
| Exhaust emits excessive smoke or vapour of any colour |7.4.B.4| | 8 |
| Nearside Side repeater not working |1.4.A.2c| | 8 |