| Most common failures | No# failures |
|---|
| Windscreen wiper does not clear the windscreen effectively | 142 |
| Headlamp aim out of alignment | 122 |
| Brake pipe excessively corroded | 106 |
| Registration plate lamp issues | 58 |
| Exhaust emits an excessive level of metered smoke |7.4.B.3a| | 26 |
| Offside Rear Direction indicator incorrect colour |1.4.A.2f| | 23 |
| Nearside Stop lamp(s) not working (4.3.1 (a) (ii)) | 23 |
| Nearside Rear Direction indicator incorrect colour |1.4.A.2f| | 22 |
| Nearside Rear Direction indicator incorrect colour (4.4.3 (a)) | 19 |
| Offside Rear Direction indicator incorrect colour (4.4.3 (a)) | 16 |
| Offside Stop lamp(s) not working (4.3.1 (a) (ii)) | 15 |
| Offside Rear fog lamp not working (4.5.1 (a) (ii)) | 14 |
| Offside Front Coil spring fractured or broken (5.3.1 (b) (i)) | 13 |
| Offside Front Position lamp not working (4.2.1 (a) (ii)) | 12 |
| Parking brake efficiency below requirements (1.4.2 (a) (i)) | 12 |
| Offside Stop lamp not working |1.2.1b| | 12 |
| Nearside Front Position lamp not working (4.2.1 (a) (ii)) | 10 |
| Central Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 10 |
| Offside Rear Stop lamp(s) not working (4.3.1 (a) (ii)) | 9 |
| Rear fog lamp not working (4.5.1 (a) (ii)) | 9 |
| Centre Stop lamp not working |1.2.1b| | 9 |
| Registration plate issues | 8 |
| Nearside Rear Stop lamp(s) not working (4.3.1 (a) (ii)) | 7 |
| Nearside Headlamp not working on dipped beam |1.7.5a| | 7 |
| Central Stop lamp not working |1.2.1b| | 7 |
| Front brake disc in such a condition that it is seriously weakened | 7 |
| Exhaust emissions exceed manufacturers specified limit (8.2.2.2 (a)) | 6 |
| Nearside Stop lamp not working |1.2.1b| | 6 |
| Offside Rear Rear fog lamp not working (4.5.1 (a) (ii)) | 6 |
| Windscreen washer not working | 6 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 6 |
| Offside Rear Wheel bearing rough when rotated (5.1.3 (b) (i)) | 6 |
| Nearside Stop lamp|s| not working |4.3.1 |a| |ii|| | 6 |
| Exhaust emissions exceed default limit of 1.5m-1 (8.2.2.2 (b)) | 5 |
| Offside Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 5 |
| Offside Headlamp not working on dipped beam |1.7.5a| | 5 |
| Offside Front Headlamp not working on dipped beam |1.7.5a| | 5 |
| Anti-lock braking system warning lamp indicates an ABS fault | 5 |
| Exhaust emissions exceed default limit of 1.5m-1 |8.2.2.2 |b|| | 5 |
| Offside Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 5 |
| Rear Exhaust has a major leak of exhaust gases |7.1.2| | 5 |
| Nearside Rear Stop lamp not working |1.2.1b| | 5 |
| Brakes imbalanced across an axle | 5 |
| Nearside Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 5 |
| Exhaust emissions test not completed because smoke levels are significantly in excess of the specified limit values (8.2.2.2 (f)) | 5 |
| Offside Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 4 |
| Nearside Rear Direction indicator incorrect colour |4.4.3 |a|| | 4 |
| Nearside Front Headlamp not working on dipped beam |1.7.5a| | 4 |
| Rear Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 4 |
| Emissions not tested (8.2.2.2 (e)) | 4 |
| Offside Rear Direction indicators incorrect colour |1.4.A.2f| | 4 |
| Rear fog lamp not working |1.3.2b| | 4 |
| Nearside Rear wheel bearing rough when rotated |2.6.1| | 4 |
| Offside Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 4 |
| Nearside Rear Stop lamp|s| not working |4.3.1 |a| |ii|| | 4 |
| Nearside Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 4 |
| Central Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 4 |
| Nearside Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 4 |
| Offside Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 4 |
| Offside Rear fog lamp not working |1.3.2b| | 4 |
| Offside Front Service brake excessively binding (1.2.1 (f)) | 3 |
| Offside Rear Direction indicator incorrect colour |4.4.3 |a|| | 3 |
| Nearside Rear Wheel bearing rough when rotated (5.1.3 (b) (i)) | 3 |
| Offside Rear Stop lamp not working |1.2.1b| | 3 |
| Offside Front Position lamp not working |4.2.1 |a|| | 3 |
| Nearside Rear All direction indicators incorrect colour (4.4.3 (a)) | 3 |
| Central Stop lamp(s) not working (4.3.1 (a) (ii)) | 3 |
| Nearside Rear Direction indicators incorrect colour |1.4.A.2f| | 3 |
| Exhaust has a major leak of exhaust gases |7.1.2| | 3 |
| Nearside Front Coil spring fractured or broken (5.3.1 (b) (i)) | 3 |
| Rear Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 3 |
| Nearside Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| Nearside Front coil spring broken |2.4.C.1a| | 3 |
| Offside Front Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 3 |
| Offside Stop lamp|s| not working |4.3.1 |a| |ii|| | 3 |
| Stop lamp not working |1.2.1b| | 3 |
| Nearside Front Brake hose excessively twisted (1.1.12 (b) (ii)) | 3 |
| Nearside Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 3 |
| Offside Front position lamp|s| not working |1.1.A.3b| | 3 |
| Centre Rear Stop lamp not working |1.2.1b| | 3 |
| Nearside Rear Position lamp not working (4.2.1 (a) (ii)) | 3 |
| Service brake: efficiency below requirements |3.7.B.7| | 3 |
| Offside Rear Wheel bearing rough when rotated |5.1.3 |b| |i|| | 3 |
| Central Rear Stop lamp(s) not working (4.3.1 (a) (ii)) | 3 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 3 |
| Nearside Rear Parking brake inoperative on one side (1.4.1 (a)) | 3 |
| Windscreen has a sticker or other obstruction encroaching into the swept area by more than 40mm outside zone `A` |8.3.1e| | 3 |