| Most common failures | No# failures |
|---|
| Registration plate lamp issues | 440 |
| Brake pipe excessively corroded | 300 |
| Headlamp aim out of alignment | 290 |
| Windscreen wiper does not clear the windscreen effectively | 257 |
| Exhaust emits an excessive level of metered smoke |7.4.B.3a| | 116 |
| Offside Rear Service brake excessively binding (1.2.1 (f)) | 94 |
| Brakes imbalanced across an axle | 89 |
| Nearside Rear Service brake excessively binding (1.2.1 (f)) | 83 |
| Front brake disc in such a condition that it is seriously weakened | 69 |
| Offside Front Position lamp not working (4.2.1 (a) (ii)) | 55 |
| Rear brake binding | 54 |
| Nearside Front Position lamp not working (4.2.1 (a) (ii)) | 53 |
| Offside Front position lamp|s| not working |1.1.A.3b| | 45 |
| Nearside Front position lamp|s| not working |1.1.A.3b| | 44 |
| Offside Headlamp aim beam image obviously incorrect |1.8.A.1b| | 44 |
| Nearside Headlamp aim beam image obviously incorrect |1.8.A.1b| | 30 |
| Parking brake efficiency below requirements (1.4.2 (a) (i)) | 26 |
| Nearside Stop lamp not working |1.2.1b| | 22 |
| Nearside Stop lamp(s) not working (4.3.1 (a) (ii)) | 22 |
| Offside Stop lamp(s) not working (4.3.1 (a) (ii)) | 21 |
| Offside Rear Service brake excessively binding |1.2.1 |f|| | 21 |
| Registration plate issues | 21 |
| Exhaust emissions exceed default limit of 1.5m-1 (8.2.2.2 (b)) | 21 |
| Windscreen washer not working | 21 |
| Offside Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 21 |
| Offside Front Front position lamp|s| not working |1.1.A.3b| | 20 |
| Exhaust emissions exceed default limit of 1.5m-1 |8.2.2.2 |b|| | 20 |
| Offside Stop lamp not working |1.2.1b| | 19 |
| Offside Front Position lamp not working |4.2.1 |a|| | 19 |
| Hazard warning switch inoperative (4.4.2 (a) (ii)) | 19 |
| Nearside Front Position lamp not working |4.2.1 |a|| | 18 |
| Nearside Front Headlamp aim beam image obviously incorrect |1.8.A.1b| | 17 |
| Front brake excessively fluctuating | 17 |
| Nearside Rear Service brake excessively binding |1.2.1 |f|| | 17 |
| Parking brake: efficiency below requirements |3.7.B.7| | 16 |
| Exhaust emissions exceed manufacturers specified limit (8.2.2.2 (a)) | 16 |
| Nearside Front Front position lamp|s| not working |1.1.A.3b| | 15 |
| Offside Front Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 15 |
| Nearside Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 15 |
| Nearside Rear Stop lamp not working |1.2.1b| | 15 |
| Hazard warning switch faulty |1.4.B.1d| | 14 |
| Supplementary restraint system warning lamp indicates a fault (7.1.6 (a)) | 14 |
| Supplementary Restraint System warning lamp indicates a fault |5.4.2| | 12 |
| Anti-lock braking system warning lamp indicates an ABS fault | 12 |
| Parking brake efficiency below requirements |1.4.2 |a| |i|| | 12 |
| Nearside Rear Stop lamp(s) not working (4.3.1 (a) (ii)) | 12 |
| Rear fog lamp not working |1.3.2b| | 12 |
| Nearside Headlamp not working on dipped beam |1.7.5a| | 11 |
| Rear brake application uneven | 11 |
| Exhaust emissions exceed manufacturer`s specified limit |8.2.2.2 |a|| | 11 |
| Parking brake lever has excessive movement indicating incorrect adjustment (1.1.6 (c)) | 11 |
| Exhaust emits an excessive level of metered smoke for a turbo charged engine |7.4.B.3b| | 10 |
| Rear Exhaust system insecure (6.1.2 (a)) | 10 |
| Nearside Front Road wheel bead rim badly distorted |4.2.A.1a| | 10 |
| Offside Front Headlamp aim beam image obviously incorrect |1.8.A.1b| | 10 |
| Exhaust emissions test not completed because smoke levels are significantly in excess of the specified limit values (8.2.2.2 (f)) | 10 |
| All direction indicators not working (4.4.1 (a) (ii)) | 10 |
| Engine MIL inoperative or indicates a malfunction (8.2.1.2 (h)) | 9 |
| Offside Headlamp not working on dipped beam |1.7.5a| | 9 |
| Offside Rear Stop lamp not working |1.2.1b| | 9 |
| Rear Exhaust system not adequately supported |7.1.1| | 9 |
| Offside Rear Position lamp not working (4.2.1 (a) (ii)) | 9 |
| Rear fog lamp not working (4.5.1 (a) (ii)) | 9 |
| Exhaust emissions test aborted because smoke levels are significantly in excess of the specified limit values |8.2.2.2 |f|| | 8 |
| Offside Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 8 |
| Nearside Front Suspension arm pin or bush excessively worn (5.3.4 (a) (i)) | 8 |
| Offside Stop lamp|s| not working |4.3.1 |a| |ii|| | 8 |
| Front Exhaust system insecure (6.1.2 (a)) | 8 |
| Exhaust system insecure (6.1.2 (a)) | 7 |
| Nearside Rear Position lamp not working (4.2.1 (a) (ii)) | 7 |
| Offside Front Suspension arm pin or bush excessively worn (5.3.4 (a) (i)) | 7 |
| Nearside Stop lamp|s| not working |4.3.1 |a| |ii|| | 7 |
| Offside Rear Stop lamp(s) not working (4.3.1 (a) (ii)) | 7 |
| Front brake application uneven | 7 |
| Offside Front Headlamp not working on dipped beam |1.7.5a| | 7 |
| Exhaust system not adequately supported |7.1.1| | 7 |
| Engine MIL inoperative or indicates a malfunction (8.2.2.2 (g)) | 7 |
| Offside Front Outer Drive shaft joint constant velocity boot split or insecure, no longer prevents the ingress of dirt (6.1.7 (g) (ii)) | 7 |
| Nearside Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 7 |
| Parking brake lever has no reserve travel |3.1.6b| | 7 |
| Rear Mechanical brake component has restricted free movement | 6 |
| Offside Front Service brake excessively binding (1.2.1 (f)) | 6 |
| Front Exhaust system not adequately supported |7.1.1| | 6 |
| Offside Rear Stop lamp|s| not working |4.3.1 |a| |ii|| | 6 |
| Rear Exhaust system insecure |6.1.2 |a|| | 6 |
| Hazard warning switch inoperative |4.4.2 |a| |ii|| | 6 |
| Exhaust emits excessive smoke or vapour of any colour |7.4.B.4| | 6 |
| Offside Rear Parking brake inoperative on one side (1.4.1 (a)) | 6 |
| Nearside Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 6 |
| Offside Rear Rear fog lamp not working (4.5.1 (a) (ii)) | 6 |
| Parking brake efficiency less than 50% of the required value (1.4.2 (a) (ii)) | 6 |
| Nearside Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 6 |
| Nearside Rear Wheel bearing rough when rotated |5.1.3 |b| |i|| | 6 |
| Hazard warning lamps inoperative |1.4.B.1b| | 6 |
| Offside Front Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 6 |
| Offside Front Anti-roll bar linkage pin or bush excessively worn (5.3.4 (a) (i)) | 6 |
| Offside Front Service brake excessively fluctuating (1.2.1 (e)) | 6 |