| Most common failures | No# failures |
|---|
| Windscreen wiper does not clear the windscreen effectively | 586 |
| Engine MIL inoperative or indicates a malfunction (8.2.2.2 (g)) | 278 |
| Headlamp aim out of alignment | 253 |
| Engine MIL inoperative or indicates a malfunction (8.2.1.2 (h)) | 105 |
| Registration plate issues | 26 |
| Rear brake disc in such a condition that it is seriously weakened | 23 |
| Offside Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 23 |
| Windscreen washer not working | 20 |
| Offside Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 20 |
| Electronic stability control warning lamp indicates a fault (7.12 (e)) | 19 |
| Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 17 |
| Exhaust emissions exceed manufacturers specified limit (8.2.2.2 (a)) | 15 |
| Offside Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 14 |
| Offside Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 14 |
| Parking brake efficiency below requirements (1.4.2 (a) (i)) | 13 |
| Anti-lock braking system warning lamp indicates an ABS fault | 13 |
| Offside Front Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 12 |
| Nearside Front Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 11 |
| Brakes imbalanced across an axle | 11 |
| Nearside Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 11 |
| Nearside Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 11 |
| Nearside Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 11 |
| Nearside Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 11 |
| Exhaust emissions exceed default limit of 0.7m-1 (8.2.2.2 (b)) | 9 |
| Nearside Front Road wheel fractured (5.2.2 (a)) | 8 |
| Service brake efficiency below requirements (1.2.2 (a) (i)) | 8 |
| Parking brake efficiency less than 50% of the required value (1.4.2 (a) (ii)) | 7 |
| Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 7 |
| Offside Rear Direction indicator not working (4.4.1 (a) (ii)) | 7 |
| Offside Front Outer Drive shaft joint constant velocity boot split or insecure, no longer prevents the ingress of dirt (6.1.7 (g) (ii)) | 7 |
| Offside Rear Service brake excessively fluctuating (1.2.1 (e)) | 7 |
| Nearside Rear Shock absorbers has a serious fluid leak | 7 |
| Offside Rear Road wheel fixing missing (5.2.1 (a) (i)) | 7 |
| Horn not working (7.7 (a)) | 6 |
| Windscreen damaged and affecting the drivers view of the road (3.2 (a) (ii)) | 6 |
| Offside Front Road wheel fractured (5.2.2 (a)) | 6 |
| Nearside Rear Direction indicator not working (4.4.1 (a) (ii)) | 6 |
| Exhaust on a vehicle fitted with a diesel particulate filter emits visible smoke of any colour (8.2.2.2 (d)) | 6 |