| Most common failures | No# failures |
|---|
| Windscreen wiper does not clear the windscreen effectively | 1065 |
| Headlamp aim out of alignment | 972 |
| Brakes imbalanced across an axle | 540 |
| Registration plate lamp issues | 508 |
| Brake pipe excessively corroded | 312 |
| Service brake: efficiency below requirements |3.7.B.7| | 173 |
| Nearside Front position lamp|s| not working |1.1.A.3b| | 169 |
| Registration plate issues | 150 |
| Offside Front position lamp|s| not working |1.1.A.3b| | 140 |
| Exhaust Lambda reading after 2nd fast idle outside specified limits (8.2.1.2 (c)) | 138 |
| Exhaust emissions Lambda reading after 2nd fast idle outside specified limits |7.3.D.3| | 123 |
| Supplementary Restraint System warning lamp indicates a fault |5.4.2| | 114 |
| Nearside Headlamp not working on dipped beam |1.7.5a| | 105 |
| Parking brake: efficiency below requirements |3.7.B.7| | 102 |
| Parking brake lever has no reserve travel |3.1.6b| | 97 |
| Offside Front Position lamp not working (4.2.1 (a) (ii)) | 95 |
| Offside Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 94 |
| Nearside Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 93 |
| Nearside Stop lamp not working |1.2.1b| | 90 |
| Offside rear brake recording little or no effort |3.7.B.5a| | 84 |
| Offside Headlamp not working on dipped beam |1.7.5a| | 83 |
| Parking brake efficiency below requirements (1.4.2 (a) (i)) | 83 |
| Nearside Front Position lamp not working (4.2.1 (a) (ii)) | 80 |
| Nearside rear brake recording little or no effort |3.7.B.5a| | 76 |
| Service brake efficiency below requirements (1.2.2 (a) (i)) | 74 |
| Offside Stop lamp not working |1.2.1b| | 69 |
| Supplementary restraint system warning lamp indicates a fault (7.1.6 (a)) | 68 |
| Engine MIL inoperative or indicates a malfunction (8.2.1.2 (h)) | 68 |
| Rear brake disc in such a condition that it is seriously weakened | 63 |
| Rear parking brake recording little or no effort | 62 |
| Rear brake binding | 60 |
| Offside Front Front position lamp|s| not working |1.1.A.3b| | 59 |
| Offside Headlamp aim beam image obviously incorrect |1.8.A.1b| | 57 |
| Front brake disc in such a condition that it is seriously weakened | 56 |
| Offside Front Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 55 |
| Front brake application uneven | 54 |
| Nearside Front Headlamp not working on dipped beam |1.7.5a| | 54 |
| Brake pedal spongy |3.3.B.1b| | 54 |
| Rear Exhaust has a major leak of exhaust gases |7.1.2| | 54 |
| Nearside Front Front position lamp|s| not working |1.1.A.3b| | 53 |
| Offside Rear rear brake recording little or no effort |3.7.B.5a| | 51 |
| Rear Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 51 |
| Nearside Rear rear brake recording little or no effort |3.7.B.5a| | 48 |
| Nearside Front Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 48 |
| Exhaust Lambda reading after 2nd fast idle outside specified limits |8.2.1.2 |c|| | 47 |
| Offside Front Coil spring fractured or broken (5.3.1 (b) (i)) | 45 |
| Nearside Headlamp aim beam image obviously incorrect |1.8.A.1b| | 44 |
| Battery insecure |1.9.1| | 43 |
| Nearside Stop lamp(s) not working (4.3.1 (a) (ii)) | 43 |
| Rear brake application uneven | 40 |
| Exhaust has a major leak of exhaust gases |7.1.2| | 40 |
| Nearside Rear Stop lamp not working |1.2.1b| | 39 |
| Offside Stop lamp(s) not working (4.3.1 (a) (ii)) | 38 |
| Offside Front Position lamp not working |4.2.1 |a|| | 37 |
| Offside Front Headlamp not working on dipped beam |1.7.5a| | 37 |
| Offside Rear Coil spring fractured or broken (5.3.1 (b) (i)) | 34 |
| Service brake efficiency below requirements |1.2.2 |a| |i|| | 34 |
| Nearside Front Position lamp not working |4.2.1 |a|| | 34 |
| Front brake excessively fluctuating | 32 |
| Emissions not tested (8.2.1.2 (d)) | 30 |
| Offside Rear Stop lamp not working |1.2.1b| | 30 |
| Anti-lock braking system warning lamp indicates an ABS fault | 30 |
| Nearside Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 29 |
| Exhaust carbon monoxide content after 2nd fast idle exceeds default limits (8.2.1.2 (b)) | 28 |
| Electronic stability control warning lamp indicates a fault (7.12 (e)) | 28 |
| Nearside Rear Stop lamp(s) not working (4.3.1 (a) (ii)) | 27 |
| Windscreen wiper blade insecure | 26 |
| Electronic stability system warning lamp indicates a fault |3.4.1c| | 26 |
| Offside Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 26 |
| Offside Rear coil spring broken |2.4.C.1a| | 26 |
| Offside Front Headlamp aim beam image obviously incorrect |1.8.A.1b| | 25 |
| Exhaust emissions likely to be affected by an exhaust leak (8.2.1.1 (b)) | 25 |
| Windscreen has a sticker or other obstruction encroaching into the swept area by more than 40mm outside zone `A` |8.3.1e| | 25 |
| Offside Rear Stop lamp(s) not working (4.3.1 (a) (ii)) | 24 |
| Nearside Rear Service brake effort inadequate at a wheel (1.2.1 (a) (i)) | 24 |
| Nearside Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 24 |
| Parking brake efficiency below requirements |1.4.2 |a| |i|| | 24 |
| Parking brake lever has excessive movement indicating incorrect adjustment (1.1.6 (c)) | 24 |
| Offside Front Anti-roll bar linkage ball joint excessively worn (5.3.4 (a) (i)) | 24 |
| Nearside Rear Service brake excessively binding (1.2.1 (f)) | 23 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 23 |
| Exhaust emissions carbon monoxide content after 2nd fast idle excessive |7.3.D.3| | 23 |
| Offside Rear fog lamp not working |1.3.2b| | 22 |
| Offside Front front brake binding |3.7.B.1| | 22 |
| Offside Front Service brake excessively binding (1.2.1 (f)) | 21 |
| Offside Rear Service brake effort inadequate at a wheel (1.2.1 (a) (i)) | 21 |
| Nearside Front Coil spring fractured or broken (5.3.1 (b) (i)) | 21 |
| Offside Parking brake inoperative on one side (1.4.1 (a)) | 21 |
| Windscreen has damage | 20 |
| Engine MIL inoperative or indicates a malfunction |8.2.1.2 |h|| | 20 |
| Nearside Rear Coil spring fractured or broken (5.3.1 (b) (i)) | 20 |
| Offside Rear Parking brake inoperative on one side (1.4.1 (a)) | 20 |
| Exhaust carbon monoxide content after 2nd fast idle exceeds manufacturers specified limits (8.2.1.2 (a)) | 20 |
| Offside front brake binding |3.7.B.1| | 19 |
| Brake lever has insufficient reserve travel (1.1.2 (a)) | 19 |
| Supplementary restraint system warning lamp indicates a fault |7.1.6 |a|| | 19 |
| Offside Front coil spring broken |2.4.C.1a| | 18 |
| Nearside Front Shock absorber has a serious fluid leak |2.7.3| | 18 |
| Brake pedal has insufficient reserve travel (1.1.2 (a)) | 18 |
| Rear Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 18 |
| Offside Stop lamp|s| not working |4.3.1 |a| |ii|| | 17 |
| Nearside Front Shock absorbers has a serious fluid leak | 17 |