| Most common failures | No# failures |
|---|
| Windscreen wiper does not clear the windscreen effectively | 1627 |
| Headlamp aim out of alignment | 764 |
| Engine MIL inoperative or indicates a malfunction (8.2.2.2 (g)) | 753 |
| Engine MIL inoperative or indicates a malfunction (8.2.1.2 (h)) | 270 |
| Exhaust emissions exceed manufacturers specified limit (8.2.2.2 (a)) | 149 |
| Registration plate issues | 99 |
| Offside Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 84 |
| Windscreen washer not working | 75 |
| Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 67 |
| Rear brake disc in such a condition that it is seriously weakened | 67 |
| Offside Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 67 |
| Offside Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 64 |
| Nearside Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 59 |
| Fuel system component leaking fuel filter (6.1.3 (b) (i)) | 54 |
| Offside Front Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 52 |
| Parking brake efficiency below requirements (1.4.2 (a) (i)) | 50 |
| Nearside Front Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 49 |
| Nearside Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 49 |
| Nearside Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 45 |
| Registration plate lamp issues | 42 |
| Exhaust emissions exceed default limit of 0.7m-1 (8.2.2.2 (b)) | 42 |
| Nearside Front Road wheel fractured (5.2.2 (a)) | 42 |
| Brakes imbalanced across an axle | 40 |
| Nearside Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 36 |
| Fuel system component leaking (6.1.3 (b) (i)) | 31 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 31 |
| Electronic stability control warning lamp indicates a fault (7.12 (e)) | 29 |
| Offside Front Road wheel fractured (5.2.2 (a)) | 29 |
| Offside Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 29 |
| Offside Front Road wheel fixing missing (5.2.1 (a) (i)) | 28 |
| Anti-lock braking system warning lamp indicates an ABS fault | 25 |
| Exhaust on a vehicle fitted with a diesel particulate filter emits visible smoke of any colour (8.2.2.2 (d)) | 23 |
| Supplementary restraint system warning lamp indicates a fault (7.1.6 (a)) | 22 |
| Fuel system component leaking fuel filter housing (6.1.3 (b) (i)) | 21 |
| Parking brake efficiency less than 50% of the required value (1.4.2 (a) (ii)) | 19 |
| Fuel system component leaking filter housing (6.1.3 (b) (i)) | 18 |
| Offside Rear Road wheel fixing missing (5.2.1 (a) (i)) | 18 |