| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 429 |
| Windscreen wiper does not clear the windscreen effectively | 391 |
| Registration plate lamp issues | 161 |
| Exhaust emissions Lambda reading after 2nd fast idle outside specified limits |7.3.D.3| | 124 |
| Nearside Track rod end ball joint has excessive play |2.2.B.1f| | 122 |
| Nearside Front Track rod end ball joint has excessive play |2.2.B.1f| | 119 |
| Offside Front position lamp|s| not working |1.1.A.3b| | 98 |
| Battery insecure |1.9.1| | 98 |
| Brakes imbalanced across an axle | 94 |
| Nearside Front position lamp|s| not working |1.1.A.3b| | 87 |
| Offside Stop lamp not working |1.2.1b| | 87 |
| Offside Track rod end ball joint has excessive play |2.2.B.1f| | 80 |
| Offside Front Track rod end ball joint has excessive play |2.2.B.1f| | 77 |
| Horn not working |1.6.2a| | 70 |
| Nearside Stop lamp not working |1.2.1b| | 70 |
| Exhaust emissions carbon monoxide content after 2nd fast idle excessive |7.3.D.3| | 61 |
| Parking brake lever has no reserve travel |3.1.6b| | 61 |
| Nearside Front wheel bearing has excessive play |2.5.A.3c| | 59 |
| Rear Exhaust has a major leak of exhaust gases |7.1.2| | 57 |
| Exhaust emissions carbon monoxide content at idle excessive |7.3.D.4| | 53 |
| Exhaust has a major leak of exhaust gases |7.1.2| | 52 |
| Offside Headlamp aim beam image obviously incorrect |1.8.A.1b| | 46 |
| Registration plate issues | 45 |
| Nearside Headlamp aim beam image obviously incorrect |1.8.A.1b| | 42 |
| Offside Headlamp not working on dipped beam |1.7.5a| | 41 |
| Offside Rear fog lamp not working |1.3.2b| | 40 |
| Rear fog lamp not working |1.3.2b| | 40 |
| Parking brake: efficiency below requirements |3.7.B.7| | 38 |
| Rear fog lamp tell tale not working |1.3.1b| | 37 |
| Nearside Headlamp not working on dipped beam |1.7.5a| | 36 |
| Front brake application uneven | 34 |
| Supplementary Restraint System warning lamp indicates a fault |5.4.2| | 34 |
| Offside Rear Stop lamp not working |1.2.1b| | 33 |
| Nearside Front Front position lamp|s| not working |1.1.A.3b| | 32 |
| Offside Rear position lamp|s| not working |1.1.A.3b| | 32 |
| Exhaust emissions hydrocarbon content after 2nd fast idle excessive |7.3.D.3| | 32 |
| Nearside Rear position lamp|s| not working |1.1.A.3b| | 30 |
| Nearside Front Front wheel bearing has excessive play |2.5.A.3c| | 30 |
| Nearside Rear Stop lamp not working |1.2.1b| | 26 |
| Centre Exhaust has a major leak of exhaust gases |7.1.2| | 25 |
| Brake pipe excessively corroded | 25 |
| Offside Front Front position lamp|s| not working |1.1.A.3b| | 24 |
| Rear fog lamp switch faulty |1.3.1a| | 22 |
| Windscreen wiper blade insecure | 21 |
| Windscreen has damage | 19 |
| Windscreen has a sticker or other obstruction encroaching into the swept area by more than 40mm outside zone `A` |8.3.1e| | 18 |
| Parking brake lever, pawl mechanism pivots or their associated mountings are insecure |3.1.4b| | 18 |
| Offside Front Headlamp not working on dipped beam |1.7.5a| | 18 |
| Offside Front Headlamp aim beam image obviously incorrect |1.8.A.1b| | 18 |
| Anti-lock braking system warning lamp indicates an ABS fault | 17 |
| Emissions not tested |7.0| | 17 |
| Rear parking brake recording little or no effort | 17 |
| Exhaust Lambda reading after 2nd fast idle outside specified limits (8.2.1.2 (c)) | 17 |
| Nearside Front Headlamp aim beam image obviously incorrect |1.8.A.1b| | 16 |
| Hazard warning switch faulty |1.4.B.1d| | 16 |
| Nearside Front Headlamp not working on dipped beam |1.7.5a| | 15 |
| Engine MIL inoperative or indicates a malfunction |8.2.1.2 |h|| | 15 |
| Nearside Front position lamp|s| incorrect colour |1.1.A.3e| | 15 |
| Offside Front front brake binding |3.7.B.1| | 14 |
| Offside Front position lamp|s| incorrect colour |1.1.A.3e| | 14 |
| Front brake disc in such a condition that it is seriously weakened | 13 |
| Front Exhaust has a major leak of exhaust gases |7.1.2| | 13 |
| Offside front brake binding |3.7.B.1| | 13 |
| Engine MIL inoperative or indicates a malfunction (8.2.1.2 (h)) | 12 |
| Offside Rear Rear fog lamp not working |1.3.2b| | 12 |
| Offside Rear position lamp|s| excessively deteriorated so that it is not visible from a reasonable distance |1.1.A.3d| | 11 |
| Windscreen washer not working | 11 |
| Offside Headlamp aim aimed so that it dazzles other road users |1.8.A.1a| | 11 |
| Nearside Front Outer Drive shaft joint constant velocity boot split or insecure, no longer prevents the ingress of dirt (6.1.7 (g) (ii)) | 11 |
| Parking brake lever insecure |3.1.3b| | 11 |
| Nearside Front Direction indicator not working |1.4.A.2c| | 10 |
| Offside Front Outer Drive shaft joint constant velocity boot split or insecure, no longer prevents the ingress of dirt (6.1.7 (g) (ii)) | 10 |
| Nearside Steering rack gaiter split |2.2.D.2d| | 10 |
| Offside Front Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 10 |
| Parking brake lever has excessive side play in the pivot and may disengage |3.1.4a| | 10 |
| Offside Rear Wheel nut|s| missing |4.2.A.1e| | 9 |
| Nearside Front Position lamp not working (4.2.1 (a) (ii)) | 9 |
| Offside Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 9 |
| Nearside Rear position lamp|s| excessively deteriorated so that it is not visible from a reasonable distance |1.1.A.3d| | 9 |
| Nearside Rear Rear wheel bearing rough when rotated |2.6.1| | 9 |
| Offside Front Direction indicator not working |1.4.A.2c| | 9 |
| Offside Headlamp insecure |1.7.3| | 9 |
| Nearside Steering rack gaiter insecure |2.2.D.2d| | 9 |
| Nearside Headlamp insecure |1.7.3| | 9 |
| Nearside Front Anti-roll bar linkage rubber mounting deteriorated resulting in excessive movement |2.4.G.2| | 9 |
| Nearside Front Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 9 |
| Service brake: efficiency below requirements |3.7.B.7| | 8 |
| Rear brake binding | 8 |
| Rear Exhaust has part of the system excessively deteriorated |7.1.1a| | 8 |
| Offside Rear wheel bearing rough when rotated |2.6.1| | 8 |
| Nearside Front constant velocity joint gaiter damaged to the extent that it no longer prevents the ingress of dirt etc |2.5.C.1a| | 8 |
| Nearside Front Service brake excessively binding (1.2.1 (f)) | 8 |
| Offside Front Position lamp not working (4.2.1 (a) (ii)) | 8 |
| Nearside Rear Wheel nut|s| missing |4.2.A.1e| | 7 |
| Exhaust has part of the system excessively deteriorated |7.1.1a| | 7 |
| Nearside Front Track rod end ball joint has excessive play (2.1.3 (b) (i)) | 7 |
| Windscreen has a sticker or other obstruction encroaching by more than 10mm within zone `A` |8.3.1b| | 7 |
| Offside Rear Position lamp not working (4.2.1 (a) (ii)) | 7 |
| Nearside Headlamp aim aimed so that it dazzles other road users |1.8.A.1a| | 7 |
| Parking brake efficiency below requirements (1.4.2 (a) (i)) | 7 |
| Bonnet cannot be secured in the closed position |8.4.1| | 7 |
| Power steering component|s| leaking |2.3.3b| | 7 |
| Rear brake application uneven | 7 |