| Most common failures | No# failures |
|---|
| Windscreen wiper does not clear the windscreen effectively | 843 |
| Headlamp aim out of alignment | 761 |
| Engine MIL inoperative or indicates a malfunction (8.2.2.2 (g)) | 658 |
| Registration plate issues | 347 |
| Engine MIL inoperative or indicates a malfunction (8.2.1.2 (h)) | 220 |
| Exhaust emissions exceed manufacturers specified limit (8.2.2.2 (a)) | 205 |
| Exhaust emissions exceed default limit of 0.7m-1 (8.2.2.2 (b)) | 109 |
| Offside Front Anti-roll bar linkage ball joint excessively worn (5.3.4 (a) (i)) | 98 |
| Nearside Front Anti-roll bar linkage ball joint excessively worn (5.3.4 (a) (i)) | 74 |
| Windscreen washer not working | 67 |
| Supplementary restraint system warning lamp indicates a fault (7.1.6 (a)) | 67 |
| Front brake disc in such a condition that it is seriously weakened | 56 |
| Rear brake disc in such a condition that it is seriously weakened | 48 |
| Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 35 |
| Brake performance unable to be tested (1.2.1 (g)) | 33 |
| Offside Front Road wheel fixing missing (5.2.1 (a) (i)) | 29 |
| Offside Front Anti-roll bar ball joint excessively worn (5.3.4 (a) (i)) | 26 |
| Nearside Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 24 |
| Offside Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 23 |
| Service brake efficiency below requirements (1.2.2 (a) (i)) | 22 |
| Exhaust on a vehicle fitted with a diesel particulate filter emits visible smoke of any colour (8.2.2.2 (d)) | 21 |
| Nearside Front Anti-roll bar ball joint excessively worn (5.3.4 (a) (i)) | 18 |
| Offside Side repeater not working (4.4.1 (a) (ii)) | 18 |
| Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 18 |
| Nearside Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 17 |
| Nearside Front Track rod end ball joint has excessive play (2.1.3 (b) (i)) | 17 |
| Offside Front Track rod end ball joint has excessive play (2.1.3 (b) (i)) | 16 |
| Offside Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 15 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 15 |
| Fuel cap/sealing device ineffective (6.1.3 (b) (i)) | 15 |