| Most common failures | No# failures |
|---|
| Brake pipe excessively corroded | 163 |
| Windscreen wiper does not clear the windscreen effectively | 119 |
| Headlamp aim out of alignment | 75 |
| Offside Front coil spring broken |2.4.C.1a| | 59 |
| Offside Front Coil spring fractured or broken (5.3.1 (b) (i)) | 51 |
| Nearside Front Coil spring fractured or broken (5.3.1 (b) (i)) | 49 |
| Exhaust emits an excessive level of metered smoke |7.4.B.3a| | 44 |
| Parking brake efficiency below requirements (1.4.2 (a) (i)) | 43 |
| Nearside Front coil spring broken |2.4.C.1a| | 43 |
| Brakes imbalanced across an axle | 20 |
| Rear brake binding | 20 |
| Offside Rear Coil spring fractured or broken (5.3.1 (b) (i)) | 18 |
| Offside Front Position lamp not working (4.2.1 (a) (ii)) | 18 |
| Offside Rear Service brake excessively binding (1.2.1 (f)) | 17 |
| Nearside Front Position lamp not working (4.2.1 (a) (ii)) | 16 |
| Nearside Front Suspension arm ball joint excessively worn (5.3.4 (a) (i)) | 16 |
| Exhaust emissions exceed default limit of 1.5m-1 (8.2.2.2 (b)) | 16 |
| Registration plate lamp issues | 15 |
| Offside Front Coil spring fractured or broken |5.3.1 |b| |i|| | 14 |
| Nearside Rear Service brake excessively binding (1.2.1 (f)) | 14 |
| Front brake disc in such a condition that it is seriously weakened | 14 |
| Nearside Rear Shock absorber has a serious fluid leak |2.7.3| | 13 |
| Parking brake: efficiency below requirements |3.7.B.7| | 13 |
| Offside Front Lower Suspension arm ball joint excessively worn (5.3.4 (a) (i)) | 11 |
| Nearside Rear Coil spring fractured or broken (5.3.1 (b) (i)) | 11 |
| Offside Rear Shock absorber has a serious fluid leak |2.7.3| | 11 |
| Offside Rear Shock absorbers has a serious fluid leak | 11 |
| Offside Front Suspension arm ball joint excessively worn (5.3.4 (a) (i)) | 11 |
| Brake hose excessively deteriorated | 11 |
| Nearside Front Coil spring fractured or broken |5.3.1 |b| |i|| | 10 |
| Nearside Rear Shock absorbers has a serious fluid leak | 10 |
| Rear parking brake recording little or no effort | 9 |
| Nearside Front Lower Suspension arm ball joint excessively worn (5.3.4 (a) (i)) | 9 |
| Rear Mechanical brake component has restricted free movement | 8 |
| Nearside Front Anti-roll bar linkage ball joint excessively worn (5.3.4 (a) (i)) | 8 |
| Parking brake lever has no reserve travel |3.1.6b| | 7 |
| Offside Stop lamp(s) not working (4.3.1 (a) (ii)) | 7 |
| Rear brake disc in such a condition that it is seriously weakened | 7 |
| Parking brake efficiency below requirements |1.4.2 |a| |i|| | 7 |
| Parking brake efficiency less than 50% of the required value (1.4.2 (a) (ii)) | 7 |
| Registration plate issues | 7 |
| Offside Rear Stop lamp(s) not working (4.3.1 (a) (ii)) | 6 |
| Brake lever has insufficient reserve travel (1.1.2 (a)) | 6 |
| Rear fog lamp not working |1.3.2b| | 6 |
| Offside Rear Stop lamp not working |1.2.1b| | 6 |
| Exhaust emissions test not completed because smoke levels are significantly in excess of the specified limit values (8.2.2.2 (f)) | 6 |
| Offside Front Anti-roll bar linkage ball joint excessively worn (5.3.4 (a) (i)) | 6 |
| Nearside Parking brake inoperative on one side (1.4.1 (a)) | 5 |
| Offside Front Suspension arm pin or bush excessively worn (5.3.4 (a) (i)) | 5 |
| Nearside Front Position lamp not working |4.2.1 |a|| | 5 |
| Parking brake lever has excessive movement indicating incorrect adjustment (1.1.6 (c)) | 5 |
| Exhaust emissions exceed default limit of 1.5m-1 |8.2.2.2 |b|| | 5 |
| Offside Front Position lamp not working |4.2.1 |a|| | 5 |
| Anti-lock braking system warning lamp indicates an ABS fault | 5 |
| Nearside Stop lamp(s) not working (4.3.1 (a) (ii)) | 5 |
| Exhaust emissions exceed manufacturers specified limit (8.2.2.2 (a)) | 5 |
| Nearside Front Suspension arm pin or bush excessively worn (5.3.4 (a) (i)) | 5 |
| Offside Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 4 |
| Nearside Front position lamp|s| not working |1.1.A.3b| | 4 |
| Parking brake: efficiency below requirements |3.7.C.1b| | 4 |
| Offside Front position lamp|s| not working |1.1.A.3b| | 4 |
| Offside Stop lamp not working |1.2.1b| | 4 |
| Exhaust emits excessive smoke or vapour of any colour |7.4.B.4| | 4 |
| Nearside Rear Service brake excessively binding |1.2.1 |f|| | 4 |
| Engine MIL inoperative or indicates a malfunction (8.2.2.2 (g)) | 4 |
| Exhaust on a vehicle fitted with a diesel particulate filter emits visible smoke of any colour (8.2.2.2 (d)) | 4 |
| Windscreen has damage | 4 |
| Electronic stability control warning lamp indicates a fault (7.12 (e)) | 4 |
| Nearside Rear Parking brake inoperative on one side (1.4.1 (a)) | 4 |
| Offside Rear Parking brake inoperative on one side (1.4.1 (a)) | 4 |
| Windscreen wiper blade insecure | 4 |
| Supplementary restraint system warning lamp indicates a fault (7.1.6 (a)) | 4 |
| Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 4 |
| Front brake excessively fluctuating | 4 |
| Electronic stability system switch faulty |3.4.5| | 3 |
| Nearside Front Suspension arm has excessive play in a ball joint |2.4.G.2| | 3 |
| Nearside Front Upper Anti-roll bar linkage ball joint dust cover no longer prevents the ingress of dirt (5.3.4 (b) (ii)) | 3 |
| Nearside Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 3 |
| Offside Front Lower Suspension arm has excessive play in a ball joint |2.4.G.2| | 3 |
| Offside Rear Service brake excessively binding |1.2.1 |f|| | 3 |
| Service brake efficiency below requirements (1.2.2 (a) (i)) | 3 |
| Windscreen washer not working | 3 |
| Offside Front Upper Anti-roll bar linkage ball joint dust cover no longer prevents the ingress of dirt |5.3.4 |b| |ii|| | 3 |
| Nearside Front Lower Suspension arm pin or bush excessively worn (5.3.4 (a) (i)) | 3 |
| Nearside Front Anti-roll bar linkage ball joint dust cover no longer prevents the ingress of dirt (5.3.4 (b) (ii)) | 3 |
| Nearside Rear Stop lamp(s) not working (4.3.1 (a) (ii)) | 3 |
| Nearside Stop lamp not working |1.2.1b| | 3 |
| Offside Parking brake inoperative on one side (1.4.1 (a)) | 3 |