| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 3838 |
| Windscreen wiper does not clear the windscreen effectively | 3709 |
| Brake pipe excessively corroded | 2059 |
| Registration plate lamp issues | 999 |
| Hazard warning switch inoperative (4.4.2 (a) (ii)) | 834 |
| Front brake disc in such a condition that it is seriously weakened | 827 |
| Nearside Front Position lamp not working (4.2.1 (a) (ii)) | 628 |
| Offside Front Position lamp not working (4.2.1 (a) (ii)) | 581 |
| Brakes imbalanced across an axle | 489 |
| Exhaust Lambda reading after 2nd fast idle outside specified limits (8.2.1.2 (c)) | 445 |
| Offside Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 373 |
| Hazard warning switch faulty |1.4.B.1d| | 286 |
| Offside Front Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 255 |
| Registration plate issues | 254 |
| Hazard warning switch inoperative |4.4.2 |a| |ii|| | 253 |
| Windscreen washer not working | 241 |
| Rear fog lamp not working (4.5.1 (a) (ii)) | 231 |
| Offside Rear Service brake excessively binding (1.2.1 (f)) | 212 |
| Offside Headlamp aim beam image obviously incorrect |1.8.A.1b| | 212 |
| Hazard warning lamps inoperative (4.4.1 (e)) | 209 |
| Parking brake efficiency below requirements (1.4.2 (a) (i)) | 206 |
| Nearside Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 198 |
| Nearside Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 195 |
| Front brake excessively fluctuating | 192 |
| Nearside Rear Service brake excessively binding (1.2.1 (f)) | 189 |
| All direction indicators not working (4.4.1 (a) (ii)) | 184 |
| Offside Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 176 |
| Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 174 |
| Supplementary restraint system warning lamp indicates a fault (7.1.6 (a)) | 158 |
| Nearside Front Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 156 |
| Engine MIL inoperative or indicates a malfunction (8.2.1.2 (h)) | 156 |
| Nearside Headlamp aim beam image obviously incorrect |1.8.A.1b| | 152 |
| Offside Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 147 |
| Nearside Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 141 |
| Offside Rear fog lamp not working (4.5.1 (a) (ii)) | 140 |
| Rear Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 137 |
| Offside Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 134 |
| Supplementary Restraint System warning lamp indicates a fault |5.4.2| | 132 |
| Hazard warning lamps inoperative |1.4.B.1b| | 130 |
| Indicator switch inoperative (4.4.2 (a) (ii)) | 129 |
| Nearside Front Position lamp not working |4.2.1 |a|| | 126 |
| Nearside Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 126 |
| Nearside Headlamp not working on dipped beam |1.7.5a| | 124 |
| Emissions not tested (8.2.1.2 (d)) | 119 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 119 |
| Rear fog lamp not working |1.3.2b| | 119 |
| Offside Rear Rear fog lamp not working (4.5.1 (a) (ii)) | 117 |
| Offside Front Service brake excessively fluctuating (1.2.1 (e)) | 116 |
| Nearside Front Anti-roll bar linkage pin or bush excessively worn (5.3.4 (a) (i)) | 116 |
| Offside Front Anti-roll bar linkage pin or bush excessively worn (5.3.4 (a) (i)) | 114 |
| Nearside Front position lamp|s| not working |1.1.A.3b| | 111 |
| Rear Exhaust system insecure (6.1.2 (a)) | 109 |
| Exhaust emissions Lambda reading after 2nd fast idle outside specified limits |7.3.D.3| | 105 |
| Offside Front Position lamp not working |4.2.1 |a|| | 104 |
| Offside Front Direction indicator incorrect colour (4.4.3 (a)) | 100 |
| Offside Front position lamp|s| not working |1.1.A.3b| | 99 |
| Offside Rear Stop lamp(s) not working (4.3.1 (a) (ii)) | 97 |
| Offside Stop lamp(s) not working (4.3.1 (a) (ii)) | 92 |
| Offside Front Headlamp aim beam image obviously incorrect |1.8.A.1b| | 90 |
| Offside Headlamp not working on dipped beam |1.7.5a| | 89 |
| Nearside Stop lamp(s) not working (4.3.1 (a) (ii)) | 86 |
| Nearside Front Service brake excessively fluctuating (1.2.1 (e)) | 84 |
| Front Service brake excessively fluctuating (1.2.1 (e)) | 82 |
| Exhaust Lambda reading after 2nd fast idle outside specified limits |8.2.1.2 |c|| | 81 |
| Front brake application uneven | 79 |
| Nearside Front Direction indicator incorrect colour (4.4.3 (a)) | 74 |
| Nearside Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 71 |
| Supplementary restraint system warning lamp indicates a fault |7.1.6 |a|| | 71 |