| Most common failures | No# failures |
|---|
| Windscreen wiper does not clear the windscreen effectively | 1097 |
| Headlamp aim out of alignment | 618 |
| Offside Front Position lamp not working (4.2.1 (a) (ii)) | 165 |
| Nearside Front Position lamp not working (4.2.1 (a) (ii)) | 160 |
| Brake pipe excessively corroded | 140 |
| Nearside Stop lamp(s) not working (4.3.1 (a) (ii)) | 122 |
| Registration plate lamp issues | 121 |
| Offside Stop lamp(s) not working (4.3.1 (a) (ii)) | 116 |
| Offside Rear Service brake excessively binding (1.2.1 (f)) | 101 |
| Nearside Rear Stop lamp(s) not working (4.3.1 (a) (ii)) | 96 |
| Windscreen washer not working | 86 |
| Offside Rear Stop lamp(s) not working (4.3.1 (a) (ii)) | 82 |
| Registration plate issues | 71 |
| Parking brake efficiency below requirements (1.4.2 (a) (i)) | 53 |
| Nearside Rear Service brake excessively binding (1.2.1 (f)) | 48 |
| Brakes imbalanced across an axle | 42 |
| Rear fog lamp not working (4.5.1 (a) (ii)) | 39 |
| Offside Rear Position lamp not working (4.2.1 (a) (ii)) | 39 |
| Nearside Rear Position lamp not working (4.2.1 (a) (ii)) | 30 |
| Supplementary restraint system warning lamp indicates a fault (7.1.6 (a)) | 29 |
| Nearside Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 27 |
| Offside Front Coil spring fractured or broken (5.3.1 (b) (i)) | 27 |
| Anti-lock braking system warning lamp indicates an ABS fault | 23 |
| Nearside Front Coil spring fractured or broken (5.3.1 (b) (i)) | 23 |
| Front brake disc in such a condition that it is seriously weakened | 22 |
| Nearside Front Road wheel fixing missing (5.2.1 (a) (i)) | 22 |
| Nearside Front Anti-roll bar linkage ball joint dust cover no longer prevents the ingress of dirt (5.3.4 (b) (ii)) | 20 |
| Brake pedal anti-slip provision worn smooth (1.1.2 (c)) | 19 |
| Brake pedal anti-slip provision missing (1.1.2 (c)) | 17 |
| Nearside Front Anti-roll bar linkage ball joint excessively worn (5.3.4 (a) (i)) | 17 |
| Offside Front Anti-roll bar linkage ball joint dust cover no longer prevents the ingress of dirt (5.3.4 (b) (ii)) | 16 |
| Nearside Rear Inner Drive shaft joint constant velocity boot split or insecure, no longer prevents the ingress of dirt (6.1.7 (g) (ii)) | 14 |
| Service brake efficiency below requirements (1.2.2 (a) (i)) | 14 |
| Offside Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 14 |
| Nearside Rear Road wheel fixing missing (5.2.1 (a) (i)) | 14 |
| Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 14 |
| Nearside Front Service brake excessively fluctuating (1.2.1 (e)) | 13 |
| Nearside Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 13 |
| Front Service brake excessively fluctuating (1.2.1 (e)) | 11 |