| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 1127 |
| Windscreen wiper does not clear the windscreen effectively | 1002 |
| Brake pipe excessively corroded | 672 |
| Registration plate lamp issues | 545 |
| Parking brake: efficiency below requirements |3.7.B.7| | 261 |
| Parking brake efficiency below requirements (1.4.2 (a) (i)) | 189 |
| Rear parking brake recording little or no effort | 151 |
| Registration plate issues | 147 |
| Nearside Front Position lamp not working (4.2.1 (a) (ii)) | 138 |
| Offside Front Position lamp not working (4.2.1 (a) (ii)) | 129 |
| Offside Rear position lamp|s| not working |1.1.A.3b| | 124 |
| Nearside Stop lamp not working |1.2.1b| | 121 |
| Brakes imbalanced across an axle | 119 |
| Offside Stop lamp not working |1.2.1b| | 118 |
| Offside Rear Position lamp not working (4.2.1 (a) (ii)) | 117 |
| Nearside Rear Position lamp not working (4.2.1 (a) (ii)) | 94 |
| Nearside Rear position lamp|s| not working |1.1.A.3b| | 90 |
| Parking brake efficiency below requirements |1.4.2 |a| |i|| | 88 |
| Nearside Front position lamp|s| not working |1.1.A.3b| | 87 |
| Rear brake binding | 86 |
| Exhaust emits an excessive level of metered smoke |7.4.B.3a| | 85 |
| Rear brake disc in such a condition that it is seriously weakened | 67 |
| Front brake disc in such a condition that it is seriously weakened | 67 |
| Offside Rear Stop lamp not working |1.2.1b| | 61 |
| Exhaust emissions exceed manufacturers specified limit (8.2.2.2 (a)) | 60 |
| Offside Front position lamp|s| not working |1.1.A.3b| | 58 |
| Nearside Rear Stop lamp not working |1.2.1b| | 54 |
| Offside Rear Rear position lamp|s| not working |1.1.A.3b| | 52 |
| Nearside Stop lamp(s) not working (4.3.1 (a) (ii)) | 51 |
| Offside Stop lamp(s) not working (4.3.1 (a) (ii)) | 51 |
| Parking brake efficiency less than 50% of the required value (1.4.2 (a) (ii)) | 51 |
| Offside Rear Coil spring fractured or broken (5.3.1 (b) (i)) | 50 |
| Windscreen washer not working | 45 |
| Nearside Front Front position lamp|s| not working |1.1.A.3b| | 42 |
| Nearside Rear Stop lamp(s) not working (4.3.1 (a) (ii)) | 40 |
| Nearside Front Position lamp not working |4.2.1 |a|| | 40 |
| Nearside Rear Rear position lamp|s| not working |1.1.A.3b| | 38 |
| Offside Rear Stop lamp(s) not working (4.3.1 (a) (ii)) | 37 |
| Brake hose excessively deteriorated | 37 |
| Parking brake lever has no reserve travel |3.1.6b| | 37 |
| Nearside Rear Coil spring fractured or broken (5.3.1 (b) (i)) | 35 |
| Nearside Front Shock absorber has a serious fluid leak |2.7.3| | 34 |
| Nearside Front Shock absorbers has a serious fluid leak | 34 |
| Nearside Front Anti-roll bar linkage ball joint dust cover no longer prevents the ingress of dirt (5.3.4 (b) (ii)) | 33 |
| Offside Rear Position lamp not working |4.2.1 |a|| | 33 |
| Nearside Parking brake inoperative on one side (1.4.1 (a)) | 32 |
| Nearside Stop lamp|s| not working |4.3.1 |a| |ii|| | 31 |
| Nearside Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 31 |
| Exhaust emissions exceed default limit of 1.5m-1 (8.2.2.2 (b)) | 31 |
| Nearside Rear Position lamp not working |4.2.1 |a|| | 30 |
| Offside Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 29 |
| Parking brake efficiency less than 50% of the required value |1.4.2 |a| |ii|| | 29 |
| Offside Front Position lamp not working |4.2.1 |a|| | 29 |
| Front brake excessively fluctuating | 28 |
| Offside Front Front position lamp|s| not working |1.1.A.3b| | 27 |
| Supplementary restraint system warning lamp indicates a fault (7.1.6 (a)) | 26 |
| Offside Front Anti-roll bar linkage ball joint dust cover no longer prevents the ingress of dirt (5.3.4 (b) (ii)) | 25 |
| Offside Rear Parking brake inoperative on one side (1.4.1 (a)) | 25 |
| Supplementary Restraint System warning lamp indicates a fault |5.4.2| | 25 |
| Windscreen has a sticker or other obstruction encroaching into the swept area by more than 40mm outside zone `A` |8.3.1e| | 24 |
| Offside Front Coil spring fractured or broken (5.3.1 (b) (i)) | 24 |
| Offside Front Shock absorbers has a serious fluid leak | 23 |
| Nearside Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 22 |
| Nearside Headlamp not working on dipped beam |1.7.5a| | 22 |
| Offside Rear Service brake excessively binding (1.2.1 (f)) | 21 |
| Anti-lock braking system warning lamp indicates an ABS fault | 21 |
| Offside Headlamp not working on dipped beam |1.7.5a| | 21 |
| Offside Stop lamp|s| not working |4.3.1 |a| |ii|| | 20 |
| Nearside Front Coil spring fractured or broken (5.3.1 (b) (i)) | 20 |
| Windscreen has damage | 19 |
| Offside Parking brake inoperative on one side (1.4.1 (a)) | 19 |
| Nearside Rear Parking brake inoperative on one side (1.4.1 (a)) | 19 |
| Rear brake application uneven | 19 |
| Horn not working |1.6.2a| | 18 |
| Windscreen wiper blade insecure | 18 |
| Rear fog lamp not working (4.5.1 (a) (ii)) | 17 |
| Nearside Rear Service brake excessively binding (1.2.1 (f)) | 17 |
| Offside Front Shock absorber has a serious fluid leak |2.7.3| | 17 |
| Rear Mechanical brake component has restricted free movement | 17 |
| Nearside Rear Stop lamp|s| not working |4.3.1 |a| |ii|| | 16 |
| Nearside Front Anti-roll bar ball joint dust cover no longer prevents the ingress of dirt (5.3.4 (b) (ii)) | 16 |
| Offside Front Headlamp not working on dipped beam |1.7.5a| | 16 |