| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 229 |
| Windscreen wiper does not clear the windscreen effectively | 154 |
| Engine MIL inoperative or indicates a malfunction (8.2.2.2 (g)) | 100 |
| Registration plate issues | 58 |
| Engine MIL inoperative or indicates a malfunction (8.2.1.2 (h)) | 39 |
| Exhaust emissions exceed manufacturers specified limit (8.2.2.2 (a)) | 33 |
| Front brake disc in such a condition that it is seriously weakened | 27 |
| Exhaust emissions exceed default limit of 0.7m-1 (8.2.2.2 (b)) | 16 |
| Windscreen washer not working | 11 |
| Exhaust on a vehicle fitted with a diesel particulate filter emits visible smoke of any colour (8.2.2.2 (d)) | 11 |
| Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 10 |
| Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 9 |
| Rear brake disc in such a condition that it is seriously weakened | 8 |
| Offside Front Road wheel fixing missing (5.2.1 (a) (i)) | 7 |
| Brake performance unable to be tested (1.2.1 (g)) | 7 |
| Offside Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 7 |
| Service brake efficiency below requirements (1.2.2 (a) (i)) | 6 |
| Offside Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 6 |
| Nearside Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 6 |
| Brakes imbalanced across an axle | 5 |
| Parking brake efficiency below requirements (1.4.2 (a) (i)) | 5 |
| Nearside Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 5 |
| Front Inner Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 5 |
| Front Service brake excessively fluctuating (1.2.1 (e)) | 4 |
| Offside Side repeater not working (4.4.1 (a) (ii)) | 4 |
| Offside Front Inner Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 4 |
| Nearside Front Inner Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 4 |
| Offside Front Service brake excessively fluctuating (1.2.1 (e)) | 4 |
| Fuel cap/sealing device ineffective (6.1.3 (b) (i)) | 3 |
| Nearside Front Service brake excessively fluctuating (1.2.1 (e)) | 3 |
| Nearside Front Service brake excessively binding (1.2.1 (f)) | 3 |
| Offside Front Service brake excessively binding (1.2.1 (f)) | 3 |