| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 4885 |
| Windscreen wiper does not clear the windscreen effectively | 4446 |
| Brake pipe excessively corroded | 3549 |
| Hazard warning switch inoperative (4.4.2 (a) (ii)) | 1422 |
| Registration plate lamp issues | 1419 |
| Nearside Front Position lamp not working (4.2.1 (a) (ii)) | 1233 |
| Offside Front Position lamp not working (4.2.1 (a) (ii)) | 1159 |
| Exhaust Lambda reading after 2nd fast idle outside specified limits (8.2.1.2 (c)) | 1069 |
| Front brake disc in such a condition that it is seriously weakened | 958 |
| Brakes imbalanced across an axle | 726 |
| Offside Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 679 |
| Offside Rear Service brake excessively binding (1.2.1 (f)) | 568 |
| Parking brake efficiency below requirements (1.4.2 (a) (i)) | 496 |
| Offside Front Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 485 |
| Nearside Rear Service brake excessively binding (1.2.1 (f)) | 480 |
| Rear fog lamp not working (4.5.1 (a) (ii)) | 434 |
| Windscreen washer not working | 379 |
| Nearside Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 370 |
| Nearside Front Anti-roll bar linkage pin or bush excessively worn (5.3.4 (a) (i)) | 366 |
| Offside Front Anti-roll bar linkage pin or bush excessively worn (5.3.4 (a) (i)) | 354 |
| Engine MIL inoperative or indicates a malfunction (8.2.1.2 (h)) | 346 |
| Hazard warning lamps inoperative (4.4.1 (e)) | 337 |
| Nearside Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 323 |
| Rear Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 322 |
| Registration plate issues | 321 |
| Hazard warning switch faulty |1.4.B.1d| | 286 |
| Offside Front Direction indicator incorrect colour (4.4.3 (a)) | 280 |
| Nearside Front Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 279 |
| Offside Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 277 |
| All direction indicators not working (4.4.1 (a) (ii)) | 269 |
| Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 263 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 261 |
| Nearside Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 255 |
| Supplementary restraint system warning lamp indicates a fault (7.1.6 (a)) | 255 |
| Hazard warning switch inoperative |4.4.2 |a| |ii|| | 253 |
| Offside Rear fog lamp not working (4.5.1 (a) (ii)) | 251 |
| Offside Rear Rear fog lamp not working (4.5.1 (a) (ii)) | 249 |
| Offside Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 233 |
| Indicator switch inoperative (4.4.2 (a) (ii)) | 230 |
| Nearside Front Direction indicator incorrect colour (4.4.3 (a)) | 226 |
| Offside Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 217 |
| Offside Headlamp aim beam image obviously incorrect |1.8.A.1b| | 212 |
| Nearside Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 208 |
| Front brake excessively fluctuating | 192 |
| Offside Stop lamp(s) not working (4.3.1 (a) (ii)) | 187 |
| Offside Rear Stop lamp(s) not working (4.3.1 (a) (ii)) | 187 |
| Offside Front Service brake excessively fluctuating (1.2.1 (e)) | 181 |
| Nearside Stop lamp(s) not working (4.3.1 (a) (ii)) | 172 |
| Rear Exhaust system insecure (6.1.2 (a)) | 168 |
| Nearside Headlamp aim beam image obviously incorrect |1.8.A.1b| | 152 |
| Exhaust emissions likely to be affected by an exhaust leak (8.2.1.1 (b)) | 150 |
| Horn not working (7.7 (a)) | 149 |
| Offside Front Service brake excessively binding (1.2.1 (f)) | 138 |
| Front Service brake excessively fluctuating (1.2.1 (e)) | 134 |
| Nearside Rear Stop lamp(s) not working (4.3.1 (a) (ii)) | 134 |
| Supplementary Restraint System warning lamp indicates a fault |5.4.2| | 132 |
| Hazard warning lamps inoperative |1.4.B.1b| | 130 |
| Nearside Front Position lamp not working |4.2.1 |a|| | 126 |
| Emissions not tested (8.2.1.2 (d)) | 125 |
| Nearside Front Service brake excessively fluctuating (1.2.1 (e)) | 125 |
| Nearside Headlamp not working on dipped beam |1.7.5a| | 124 |
| Offside Rear Shock absorbers has a serious fluid leak | 124 |
| Parking brake lever has excessive movement indicating incorrect adjustment (1.1.6 (c)) | 120 |
| Emissions unable to be completed (8.2.1.2 (d)) | 119 |
| Rear fog lamp not working |1.3.2b| | 119 |
| Nearside Front position lamp|s| not working |1.1.A.3b| | 111 |
| Offside Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 110 |
| Exhaust emissions Lambda reading after 2nd fast idle outside specified limits |7.3.D.3| | 105 |
| Offside Rear Position lamp not working (4.2.1 (a) (ii)) | 104 |
| Offside Front Position lamp not working |4.2.1 |a|| | 104 |
| Exhaust carbon monoxide content after 2nd fast idle exceeds manufacturers specified limits (8.2.1.2 (a)) | 100 |
| Offside Front position lamp|s| not working |1.1.A.3b| | 99 |
| Nearside Headlamp insecure (4.1.1 (c)) | 98 |