| Most common failures | No# failures |
|---|
| Windscreen wiper does not clear the windscreen effectively | 1244 |
| Headlamp aim out of alignment | 770 |
| Offside Rear Coil spring fractured or broken (5.3.1 (b) (i)) | 458 |
| Nearside Rear Coil spring fractured or broken (5.3.1 (b) (i)) | 418 |
| Brake pipe excessively corroded | 292 |
| Engine MIL inoperative or indicates a malfunction (8.2.2.2 (g)) | 254 |
| Nearside Front Position lamp not working (4.2.1 (a) (ii)) | 213 |
| Offside Front Position lamp not working (4.2.1 (a) (ii)) | 176 |
| Registration plate lamp issues | 161 |
| Parking brake efficiency below requirements (1.4.2 (a) (i)) | 152 |
| Exhaust emissions exceed manufacturers specified limit (8.2.2.2 (a)) | 134 |
| Registration plate issues | 128 |
| Offside Front Suspension arm ball joint excessively worn (5.3.4 (a) (i)) | 121 |
| Engine MIL inoperative or indicates a malfunction (8.2.1.2 (h)) | 110 |
| Rear brake disc in such a condition that it is seriously weakened | 96 |
| Nearside Front Suspension arm ball joint excessively worn (5.3.4 (a) (i)) | 91 |
| Windscreen washer not working | 78 |
| Exhaust on a vehicle fitted with a diesel particulate filter emits visible smoke of any colour (8.2.2.2 (d)) | 74 |
| Brakes imbalanced across an axle | 65 |
| Nearside Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 61 |
| Nearside Front Lower Suspension arm ball joint excessively worn (5.3.4 (a) (i)) | 58 |
| Offside Front Anti-roll bar linkage ball joint excessively worn (5.3.4 (a) (i)) | 56 |
| Offside Front Lower Suspension arm ball joint excessively worn (5.3.4 (a) (i)) | 56 |
| Offside Front Anti-roll bar linkage ball joint dust cover no longer prevents the ingress of dirt (5.3.4 (b) (ii)) | 53 |
| Front brake disc in such a condition that it is seriously weakened | 51 |
| Exhaust emissions exceed default limit of 0.7m-1 (8.2.2.2 (b)) | 49 |
| Electronic stability control warning lamp indicates a fault (7.12 (e)) | 45 |
| Exhaust emissions test not completed because smoke levels are significantly in excess of the specified limit values (8.2.2.2 (f)) | 43 |
| Nearside Front Anti-roll bar linkage ball joint excessively worn (5.3.4 (a) (i)) | 39 |
| Offside Front Road wheel fixing missing (5.2.1 (a) (i)) | 38 |
| Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 36 |
| Nearside Front Anti-roll bar linkage ball joint dust cover no longer prevents the ingress of dirt (5.3.4 (b) (ii)) | 35 |
| Parking brake: efficiency below requirements |3.7.B.7| | 35 |
| Nearside Front Suspension arm pin or bush excessively worn (5.3.4 (a) (i)) | 32 |
| Nearside Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 31 |
| Offside Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 31 |
| Rear parking brake recording little or no effort | 30 |
| Parking brake efficiency below requirements |1.4.2 |a| |i|| | 29 |
| Offside Rear Parking brake inoperative on one side (1.4.1 (a)) | 27 |
| Offside Front Service brake excessively fluctuating (1.2.1 (e)) | 27 |
| Offside Rear Service brake excessively binding (1.2.1 (f)) | 26 |
| Offside Parking brake inoperative on one side (1.4.1 (a)) | 26 |
| Offside Front Anti-roll bar linkage fractured (5.3.3 (b) (ii)) | 26 |
| Nearside Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 25 |
| Offside Front Suspension arm pin or bush excessively worn (5.3.4 (a) (i)) | 25 |
| Offside Front Track rod end ball joint has excessive play (2.1.3 (b) (i)) | 24 |
| Parking brake efficiency less than 50% of the required value (1.4.2 (a) (ii)) | 24 |
| Nearside Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 24 |
| Offside Front Anti-roll bar linkage ball joint likely to become detached (5.3.4 (a) (ii)) | 24 |
| Offside Front Anti-roll bar linkage insecure and impairing directional stability (5.3.3 (a) (ii)) | 23 |
| Exhaust emits excessive smoke or vapour likely to obscure the vision of other road users (8.2.2.2 (c)) | 23 |
| Nearside Rear Parking brake inoperative on one side (1.4.1 (a)) | 23 |
| Nearside Front Service brake excessively fluctuating (1.2.1 (e)) | 22 |