| Most common failures | No# failures |
|---|
| Registration plate lamp issues | 1323 |
| Headlamp aim out of alignment | 1015 |
| Windscreen wiper does not clear the windscreen effectively | 893 |
| Brake pipe excessively corroded | 491 |
| Exhaust emissions Lambda reading after 2nd fast idle outside specified limits |7.3.D.3| | 227 |
| Offside Headlamp aim beam image obviously incorrect |1.8.A.1b| | 223 |
| Brakes imbalanced across an axle | 217 |
| Front brake disc in such a condition that it is seriously weakened | 187 |
| Nearside Front position lamp|s| not working |1.1.A.3b| | 180 |
| Offside Stop lamp not working |1.2.1b| | 175 |
| Offside Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 166 |
| Offside Front position lamp|s| not working |1.1.A.3b| | 163 |
| Supplementary Restraint System warning lamp indicates a fault |5.4.2| | 161 |
| Nearside Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 149 |
| Rear brake binding | 145 |
| Nearside Stop lamp not working |1.2.1b| | 145 |
| Nearside Headlamp aim beam image obviously incorrect |1.8.A.1b| | 131 |
| Exhaust Lambda reading after 2nd fast idle outside specified limits (8.2.1.2 (c)) | 122 |
| Hazard warning switch faulty |1.4.B.1d| | 121 |
| Offside Front Position lamp not working (4.2.1 (a) (ii)) | 110 |
| Offside Front Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 107 |
| Nearside Front Position lamp not working (4.2.1 (a) (ii)) | 102 |
| Rear Exhaust has a major leak of exhaust gases |7.1.2| | 99 |
| Nearside Front Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 96 |
| Nearside Rear Service brake excessively binding (1.2.1 (f)) | 95 |
| Registration plate issues | 94 |
| Exhaust emissions carbon monoxide content after 2nd fast idle excessive |7.3.D.3| | 93 |
| Parking brake: efficiency below requirements |3.7.B.7| | 88 |
| Exhaust has a major leak of exhaust gases |7.1.2| | 85 |
| Offside Front Headlamp aim beam image obviously incorrect |1.8.A.1b| | 84 |
| Nearside Front Headlamp aim beam image obviously incorrect |1.8.A.1b| | 81 |
| Offside Headlamp not working on dipped beam |1.7.5a| | 81 |
| Parking brake efficiency below requirements (1.4.2 (a) (i)) | 79 |
| Offside Rear Stop lamp not working |1.2.1b| | 77 |
| Engine MIL inoperative or indicates a malfunction (8.2.1.2 (h)) | 76 |
| Hazard warning switch inoperative (4.4.2 (a) (ii)) | 72 |
| Nearside Headlamp not working on dipped beam |1.7.5a| | 71 |
| Rear parking brake recording little or no effort | 71 |
| Offside Rear Service brake excessively binding (1.2.1 (f)) | 67 |
| Nearside Front Front position lamp|s| not working |1.1.A.3b| | 61 |
| Supplementary restraint system warning lamp indicates a fault (7.1.6 (a)) | 59 |
| Rear Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 59 |
| Hazard warning lamps inoperative |1.4.B.1b| | 58 |
| Offside Headlamp excessively deteriorated so that the light output is severely reduced |1.7.5a| | 57 |
| Nearside Stop lamp(s) not working (4.3.1 (a) (ii)) | 54 |
| Offside Stop lamp(s) not working (4.3.1 (a) (ii)) | 54 |
| Nearside Headlamp excessively deteriorated so that the light output is severely reduced |1.7.5a| | 53 |
| Nearside Rear Stop lamp not working |1.2.1b| | 53 |
| Nearside Headlamp lens seriously defective (4.1.1 (b) (ii)) | 52 |
| Exhaust Lambda reading after 2nd fast idle outside specified limits |8.2.1.2 |c|| | 52 |
| Offside Front Front position lamp|s| not working |1.1.A.3b| | 51 |
| Offside Headlamp lens seriously defective (4.1.1 (b) (ii)) | 48 |
| Horn not working |1.6.2a| | 48 |
| Offside Headlamp aim projected beam image is obviously incorrect |4.1.2 |c|| | 45 |
| Front brake excessively fluctuating | 44 |
| Nearside Front Position lamp not working |4.2.1 |a|| | 41 |
| Offside Front Position lamp not working |4.2.1 |a|| | 40 |
| Nearside Headlamp aim projected beam image is obviously incorrect |4.1.2 |c|| | 40 |
| Windscreen washer not working | 39 |
| Emissions not tested (8.2.1.2 (d)) | 39 |
| Parking brake lever has no reserve travel |3.1.6b| | 39 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 38 |
| Exhaust system not adequately supported |7.1.1| | 37 |
| Offside Rear position lamp|s| not working |1.1.A.3b| | 37 |
| Offside Headlamp has a product on the lens so that the light output is severely reduced (4.1.4 (b)) | 34 |
| Nearside Headlamp has a product on the lens so that the light output is severely reduced (4.1.4 (b)) | 33 |
| Rear Exhaust system not adequately supported |7.1.1| | 33 |
| Nearside Headlamp has a product on the lens so that the light output is severely reduced |1.7.5a| | 31 |
| Nearside Front Headlamp not working on dipped beam |1.7.5a| | 31 |
| Offside Headlamp has a product on the lens so that the light output is severely reduced |1.7.5a| | 31 |
| Nearside Front Road wheel bead rim badly distorted |4.2.A.1a| | 30 |
| Offside Rear Stop lamp(s) not working (4.3.1 (a) (ii)) | 30 |
| Exhaust emissions hydrocarbon content after 2nd fast idle excessive |7.3.D.3| | 29 |
| Supplementary restraint system warning lamp indicates a fault |7.1.6 |a|| | 29 |
| Nearside Front Headlamp has a product on the lens so that the light output is severely reduced (4.1.4 (b)) | 29 |
| Offside Headlamp has a product on the lens so that the light output is severely reduced |4.1.4 |b|| | 28 |
| Engine MIL inoperative or indicates a malfunction |8.2.1.2 |h|| | 28 |
| Windscreen wiper blade insecure | 27 |
| Offside Front Headlamp lens seriously defective (4.1.1 (b) (ii)) | 27 |
| Horn not working (7.7 (a) (ii)) | 27 |
| Nearside Rear Service brake excessively binding |1.2.1 |f|| | 27 |
| Offside Front Anti-roll bar linkage pin or bush excessively worn (5.3.4 (a) (i)) | 26 |
| Indicator switch faulty |1.4.A.1| | 26 |
| Offside Front Headlamp has a product on the lens so that the light output is severely reduced (4.1.4 (b)) | 26 |
| Offside Headlamp light intensity severely reduced (4.1.4 (a)) | 26 |
| Nearside Headlamp light intensity severely reduced (4.1.4 (a)) | 26 |
| Hazard warning lamps inoperative (4.4.1 (e)) | 26 |
| Nearside Front Anti-roll bar linkage pin or bush excessively worn (5.3.4 (a) (i)) | 25 |
| Exhaust emissions carbon monoxide content at idle excessive |7.3.D.4| | 25 |
| Electronic power steering warning lamp indicates a failure in the system |2.3.8| | 25 |
| Hazard warning switch inoperative |4.4.2 |a| |ii|| | 24 |
| Nearside Rear Stop lamp(s) not working (4.3.1 (a) (ii)) | 24 |
| Nearside Stop lamp|s| not working |4.3.1 |a| |ii|| | 24 |
| Offside Stop lamp|s| not working |4.3.1 |a| |ii|| | 23 |
| Front brake application uneven | 23 |
| Offside Front Headlamp excessively deteriorated so that the light output is severely reduced |1.7.5a| | 23 |
| Power steering inoperative |2.3.3a| | 23 |
| Nearside Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 23 |
| Nearside Front Headlamp lens seriously defective (4.1.1 (b) (ii)) | 22 |
| Offside Front Headlamp not working on dipped beam |1.7.5a| | 22 |
| Rear fog lamp not working (4.5.1 (a) (ii)) | 22 |
| Battery insecure |1.9.1| | 22 |
| Anti-lock braking system warning lamp indicates an ABS fault | 22 |
| Rear fog lamp not working |1.3.2b| | 22 |
| Windscreen has a sticker or other obstruction encroaching into the swept area by more than 40mm outside zone `A` |8.3.1e| | 21 |
| Exhaust carbon monoxide content after 2nd fast idle exceeds default limits |8.2.1.2 |b|| | 21 |
| Offside Rear fog lamp not working |1.3.2b| | 21 |
| Exhaust carbon monoxide content after 2nd fast idle exceeds default limits (8.2.1.2 (b)) | 21 |
| Exhaust emissions likely to be affected by an exhaust leak (8.2.1.1 (b)) | 20 |
| Nearside Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 20 |
| Nearside Headlamp insecure |1.7.3| | 20 |
| Offside Headlamp aim aimed so that it dazzles other road users |1.8.A.1a| | 20 |
| Nearside Front Headlamp excessively deteriorated so that the light output is severely reduced |1.7.5a| | 20 |
| Offside Headlamp aim so that beam "kick up" is not visible on the screen |4.1.2 |a|| | 20 |
| Nearside Rear wheel bearing rough when rotated |2.6.1| | 20 |
| Offside Rear Service brake excessively binding |1.2.1 |f|| | 20 |