| Most common failures | No# failures |
|---|
| Windscreen wiper does not clear the windscreen effectively | 220 |
| Registration plate lamp issues | 220 |
| Headlamp aim out of alignment | 145 |
| Offside Front position lamp|s| not working |1.1.A.3b| | 48 |
| Nearside Front position lamp|s| not working |1.1.A.3b| | 38 |
| Offside Front Position lamp not working (4.2.1 (a) (ii)) | 37 |
| Brake hose excessively deteriorated | 36 |
| Nearside Front Position lamp not working (4.2.1 (a) (ii)) | 33 |
| Nearside Stop lamp not working |1.2.1b| | 24 |
| Offside Rear fog lamp not working |1.3.2b| | 23 |
| Parking brake efficiency below requirements (1.4.2 (a) (i)) | 22 |
| Offside Stop lamp not working |1.2.1b| | 22 |
| Windscreen washer not working | 17 |
| Offside Front Position lamp not working |4.2.1 |a|| | 16 |
| Parking brake: efficiency below requirements |3.7.B.7| | 15 |
| Anti-lock braking system warning lamp indicates an ABS fault | 15 |
| Offside Front Shock absorbers has a serious fluid leak | 15 |
| Front brake disc in such a condition that it is seriously weakened | 14 |
| Offside Front Shock absorber has a serious fluid leak |2.7.3| | 14 |
| Parking brake: efficiency below requirements |3.7.C.1b| | 14 |
| Nearside Front Position lamp not working |4.2.1 |a|| | 14 |
| Rear fog lamp not working (4.5.1 (a) (ii)) | 13 |
| Offside Rear fog lamp not working (4.5.1 (a) (ii)) | 13 |
| Registration plate issues | 13 |
| Nearside Rear Stop lamp(s) not working (4.3.1 (a) (ii)) | 12 |
| Nearside Front Lower Suspension arm ball joint excessively worn (5.3.4 (a) (i)) | 12 |
| Nearside Front Front position lamp|s| not working |1.1.A.3b| | 12 |
| Offside Front Lower Suspension arm ball joint excessively worn (5.3.4 (a) (i)) | 11 |
| Rear parking brake recording little or no effort | 11 |
| Nearside Headlamp not working on dipped beam |1.7.5a| | 11 |
| Rear fog lamp not working |1.3.2b| | 10 |
| Nearside Front suspension has excessive play in a lower suspension ball joint |2.5.B.1a| | 9 |
| Offside Front suspension has excessive play in a lower suspension ball joint |2.5.B.1a| | 9 |
| Nearside Stop lamp(s) not working (4.3.1 (a) (ii)) | 9 |
| Oil leaking excessively from engine (8.4.1 (a) (i)) | 9 |
| Engine MIL inoperative or indicates a malfunction (8.2.2.2 (g)) | 9 |
| Brake pipe excessively corroded | 9 |
| Offside Rear Stop lamp not working |1.2.1b| | 8 |
| Rear fog lamp not working |4.5.1 |a| |ii|| | 8 |
| Nearside Front Headlamp not working on dipped beam |1.7.5a| | 8 |
| Offside Rear Rear fog lamp not working (4.5.1 (a) (ii)) | 8 |
| Offside Front Front position lamp|s| not working |1.1.A.3b| | 8 |
| Nearside Front Shock absorber has a serious fluid leak |2.7.3| | 7 |
| Offside Front Headlamp not working on dipped beam |1.7.5a| | 7 |
| Offside Rear Anti-roll bar linkage ball joint excessively worn (5.3.4 (a) (i)) | 7 |
| Offside Front Lower Suspension arm ball joint excessively worn |5.3.4 |a| |i|| | 7 |
| Nearside Headlamp aim beam image obviously incorrect |1.8.A.1b| | 7 |
| Nearside Front Shock absorbers has a serious fluid leak | 7 |
| Offside Front Lower Suspension arm has excessive play in a ball joint |2.4.G.2| | 7 |
| Offside Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 7 |
| Nearside Rear Shock absorber has a serious fluid leak |2.7.3| | 7 |
| Nearside Rear Anti-roll bar linkage ball joint excessively worn (5.3.4 (a) (i)) | 6 |
| Offside Front Outer Drive shaft joint constant velocity boot split or insecure, no longer prevents the ingress of dirt (6.1.7 (g) (ii)) | 6 |
| Electronic stability system warning lamp indicates a fault |3.4.1c| | 6 |
| Nearside Rear Shock absorbers has a serious fluid leak | 6 |
| Offside Rear fog lamp not working |4.5.1 |a| |ii|| | 6 |
| Parking brake efficiency less than 50% of the required value (1.4.2 (a) (ii)) | 6 |
| Fuel system component leaking |7.2.3| | 6 |
| Rear brake disc in such a condition that it is seriously weakened | 6 |
| Offside Rear Rear fog lamp not working |1.3.2b| | 6 |
| Nearside Front Lower Suspension arm has excessive play in a ball joint |2.4.G.2| | 6 |
| Offside Rear Shock absorber has a serious fluid leak |2.7.3| | 5 |
| Electronic stability control warning lamp indicates a fault (7.12 (e)) | 5 |
| Brakes imbalanced across an axle | 5 |
| Engine MIL inoperative or indicates a malfunction (8.2.1.2 (h)) | 5 |
| Exhaust emits excessive smoke or vapour likely to obscure the vision of other road users (8.2.2.2 (c)) | 5 |
| Exhaust emits an excessive level of metered smoke for a turbo charged engine |7.4.B.3b| | 5 |
| Nearside Rear Valve stem seriously damaged |4.1.D.1e| | 5 |
| Nearside Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 5 |
| Parking brake efficiency below requirements |1.4.2 |a| |i|| | 5 |
| Nearside Rear Stop lamp not working |1.2.1b| | 5 |
| Offside Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 5 |
| Nearside Front Lower Suspension component ball joint excessively worn (5.3.4 (a) (i)) | 4 |
| Trailer electrical socket |13 pin| not operating the trailer lamps as intended |1.9.4| | 4 |
| Offside Stop lamp|s| not working |4.3.1 |a| |ii|| | 4 |
| Nearside Front Lower Suspension arm ball joint excessively worn |5.3.4 |a| |i|| | 4 |
| Offside Stop lamp(s) not working (4.3.1 (a) (ii)) | 4 |
| Offside Rear Road wheel fixing missing (5.2.1 (a) (i)) | 4 |
| Stop lamp(s) all not working (4.3.1 (a) (iii)) | 4 |
| Battery insecure |1.9.1| | 4 |
| Exhaust emissions test not completed because smoke levels are significantly in excess of the specified limit values (8.2.2.2 (f)) | 4 |
| Nearside Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 4 |
| Offside Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 4 |
| Offside Front Suspension arm ball joint excessively worn (5.3.4 (a) (i)) | 3 |
| Offside Rear Stop lamp(s) not working (4.3.1 (a) (ii)) | 3 |
| Exhaust emits excessive smoke or vapour of any colour |7.4.B.4| | 3 |
| Nearside Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 3 |
| Exhaust emissions exceed level of metered smoke for a turbo charged engine |8.2.2.2 |b|| | 3 |
| Offside Rear Anti-roll bar linkage has excessive play in a ball joint |2.4.G.2| | 3 |
| Offside Front Wheel nut|s| missing |4.2.A.1e| | 3 |
| Windscreen has a sticker or other obstruction encroaching into the swept area by more than 40mm outside zone `A` |8.3.1e| | 3 |
| Nearside Front Road wheel fixing missing (5.2.1 (a) (i)) | 3 |
| Offside Front Front suspension has excessive play in a lower suspension ball joint |2.5.B.1a| | 3 |
| Engine MIL inoperative or indicates a malfunction |8.2.2.2 |g|| | 3 |
| Nearside Parking brake inoperative on one side (1.4.1 (a)) | 3 |
| Offside Parking brake inoperative on one side (1.4.1 (a)) | 3 |
| Rear Rear fog lamp not working (4.5.1 (a) (ii)) | 3 |
| Rear fog lamp tell tale not working |1.3.1b| | 3 |
| Offside Front Valve stem seriously damaged |4.1.D.1e| | 3 |
| Offside Position lamp not working (4.2.1 (a) (ii)) | 3 |
| Offside Headlamp not working on dipped beam |1.7.5a| | 3 |
| Offside Front Lower Suspension component ball joint excessively worn (5.3.4 (a) (i)) | 3 |
| Front position lamp|s| not working |1.1.A.3b| | 3 |
| Nearside Front Suspension arm has excessive play in a ball joint |2.4.G.2| | 3 |
| Nearside Front Upper Suspension arm ball joint excessively worn (5.3.4 (a) (i)) | 3 |
| Brake fluid contaminated (1.8 (a)) | 3 |
| Exhaust emits an excessive level of metered smoke |7.4.B.3a| | 3 |
| Offside Rear Wheel nut|s| missing |4.2.A.1e| | 3 |
| Offside Front Track rod end ball joint has excessive play (2.1.3 (b) (i)) | 3 |
| Nearside Front Track rod end ball joint has excessive play (2.1.3 (b) (i)) | 3 |