| Most common failures | No# failures |
|---|
| Brake pipe excessively corroded | 172 |
| Headlamp aim out of alignment | 142 |
| Windscreen wiper does not clear the windscreen effectively | 135 |
| Registration plate lamp issues | 67 |
| Horn not working |1.6.2a| | 41 |
| Brakes imbalanced across an axle | 36 |
| Rear brake binding | 34 |
| Horn not working (7.7 (a)) | 29 |
| Parking brake: efficiency below requirements |3.7.B.7| | 25 |
| Registration plate issues | 24 |
| Exhaust system not adequately supported |7.1.1| | 23 |
| Windscreen washer not working | 23 |
| Offside Rear fog lamp not working |1.3.2b| | 20 |
| Service brake: efficiency below requirements |3.7.B.7| | 18 |
| Parking brake efficiency below requirements (1.4.2 (a) (i)) | 15 |
| Service brake efficiency below requirements (1.2.2 (a) (i)) | 14 |
| Nearside Stop lamp not working |1.2.1b| | 13 |
| Offside Stop lamp not working |1.2.1b| | 11 |
| Nearside Headlamp aim beam image kick up to the offside |1.8| | 10 |
| Rear fog lamp not working (4.5.1 (a) (ii)) | 9 |
| Rear brake application uneven | 9 |
| Offside Headlamp aim beam image kick up to the offside |1.8| | 9 |
| Offside Rear Position lamp not working (4.2.1 (a) (ii)) | 9 |
| Rear fog lamp not working |1.3.2b| | 9 |
| Horn not working (7.7 (a) (ii)) | 9 |
| Nearside Front Position lamp not working (4.2.1 (a) (ii)) | 9 |
| Exhaust has a major leak of exhaust gases |7.1.2| | 9 |
| Nearside Rear Position lamp not working (4.2.1 (a) (ii)) | 8 |
| Offside Front Suspension component mounting prescribed area is excessively corroded |2.4.A.3| | 8 |
| Brake hose excessively deteriorated | 8 |
| Offside Front Service brake excessively binding (1.2.1 (f)) | 7 |
| Exhaust system insecure (6.1.2 (a)) | 7 |
| Nearside Front Service brake excessively binding (1.2.1 (f)) | 7 |
| Windscreen has damage | 7 |
| Offside Rear Service brake excessively binding (1.2.1 (f)) | 7 |
| Nearside Front Direction indicators incorrect colour |1.4.A.2f| | 7 |
| Nearside Rear Service brake excessively binding (1.2.1 (f)) | 7 |
| Nearside Side repeater not working (4.4.1 (a) (ii)) | 7 |
| Nearside Front Direction indicator incorrect colour (4.4.3 (a)) | 6 |
| Offside Front Direction indicator incorrect colour (4.4.3 (a)) | 6 |
| Offside Front Position lamp not working (4.2.1 (a) (ii)) | 6 |
| Nearside Rear position lamp|s| adversely affected by the operation of another lamp |1.1.A.3f| | 6 |
| Nearside Front Upper Outline marker lamp not working (4.2.1 (a) (ii)) | 6 |
| Nearside Front position lamp|s| not working |1.1.A.3b| | 6 |
| Offside Front Direction indicator incorrect colour |1.4.A.2f| | 6 |
| Nearside Front wheel bearing has excessive play |2.5.A.3c| | 6 |
| Parking brake lever has no reserve travel |3.1.6b| | 5 |
| Rear parking brake recording little or no effort | 5 |
| Offside Rear Direction indicator incorrect colour |1.4.A.2f| | 5 |
| Rear Exhaust system not adequately supported |7.1.1| | 5 |
| Nearside Rear position lamp|s| not working |1.1.A.3b| | 5 |
| Battery insecure |1.9.1| | 5 |
| Nearside Stop lamp(s) not working (4.3.1 (a) (ii)) | 5 |
| Offside Front wheel bearing has excessive play |2.5.A.3c| | 5 |
| Horn not working |7.7 |a| |ii|| | 5 |
| Offside Front position lamp|s| not working |1.1.A.3b| | 5 |
| Offside Front Suspension component mounting prescribed area excessively corroded significantly reducing structural strength (5.3.6 (a) (i)) | 5 |
| Hazard warning tell tale not working correctly |1.4.B.1e| | 5 |
| Offside front brake binding |3.7.B.1| | 5 |
| Nearside Front Headlamp aim beam image kick up to the offside |1.8| | 5 |
| Offside Front Headlamp aim beam image kick up to the offside |1.8| | 5 |
| Offside Front Direction indicators incorrect colour |1.4.A.2f| | 5 |
| Nearside Rear Direction indicators incorrect colour |1.4.A.2f| | 5 |
| Offside Rear position lamp|s| not working |1.1.A.3b| | 5 |
| Front brake disc in such a condition that it is seriously weakened | 5 |
| Nearside Front Direction indicator incorrect colour |1.4.A.2f| | 5 |
| Horn not loud enough to be heard by another road user |1.6.2b| | 5 |
| Nearside front brake binding |3.7.B.1| | 5 |
| Offside Rear Direction indicators incorrect colour |1.4.A.2f| | 5 |
| Nearside Windscreen wiper blade deteriorated |8.2.2| | 4 |
| Parking brake efficiency less than 50% of the required value (1.4.2 (a) (ii)) | 4 |
| Offside Side repeater not working |1.4.A.2c| | 4 |
| Nearside Front Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 4 |
| Offside Front Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 4 |
| Offside Headlamp insecure |1.7.3| | 4 |
| Fuel system component leaking |7.2.3| | 4 |
| Front brake application uneven | 4 |
| Offside Rear Shock absorber has an excessively worn bush |2.7.4| | 4 |
| Nearside Headlamp not working on dipped beam |1.7.5a| | 4 |
| Offside Front Wheel bearing has excessive play (5.1.3 (a) (i)) | 4 |
| Nearside Rear Rear wheel bearing has excessive play |2.6.2| | 4 |
| Offside Rear Rear wheel bearing has excessive play |2.6.2| | 4 |
| Offside Rear Rear fog lamp not working (4.5.1 (a) (ii)) | 4 |
| Offside Headlamp not working on dipped beam |1.7.5a| | 3 |
| Offside Windscreen wiper blade deteriorated |8.2.2| | 3 |
| Rear Mechanical brake component has restricted free movement | 3 |
| Nearside Front Brake pipe leaking |3.6.A.1| | 3 |
| Nearside Front Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 3 |
| Offside Rear Direction indicator incorrect colour |4.4.3 |a|| | 3 |
| Offside Front Subframe mounting prescribed area excessively corroded significantly reducing structural strength (5.3.6 (a) (i)) | 3 |
| Nearside Rear Stop lamp(s) not working (4.3.1 (a) (ii)) | 3 |
| Offside Rear fog lamp missing |1.3.2a| | 3 |
| Offside Rear fog lamp not working (4.5.1 (a) (ii)) | 3 |
| Offside Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 3 |
| Brake performance unable to be tested (1.2.1 (g)) | 3 |
| Nearside Front Subframe mounting prescribed area excessively corroded significantly reducing structural strength (5.3.6 (a) (i)) | 3 |
| Offside Rear position lamp|s| adversely affected by the operation of another lamp |1.1.A.3f| | 3 |
| Front Exhaust system not adequately supported |7.1.1| | 3 |
| Nearside Rear Shock absorber has an excessively worn bush |2.7.4| | 3 |
| Nearside Side repeater not working |1.4.A.2c| | 3 |
| Offside Front Suspension component mounting prescribed area excessively corroded significantly reducing structural strength chassis (5.3.6 (a) (i)) | 3 |
| Centre Exhaust has a major leak of exhaust gases |7.1.2| | 3 |
| Nearside Front Outer Drive shaft joint constant velocity boot split or insecure, no longer prevents the ingress of dirt (6.1.7 (g) (ii)) | 3 |
| Offside Outline marker lamp not working (4.2.1 (a) (ii)) | 3 |
| Offside Front Brake pipe leaking on a hydraulic braking system (1.1.11 (b) (ii)) | 3 |
| Nearside Front Suspension component mounting prescribed area is excessively corroded |2.4.A.3| | 3 |
| Nearside Front Direction indicator not working |1.4.A.2c| | 3 |
| Offside Rear Direction indicator not working |1.4.A.2c| | 3 |
| Offside Rear Shock absorber has a serious fluid leak |2.7.3| | 3 |
| Front Exhaust has a major leak of exhaust gases |7.1.2| | 3 |
| Offside Side repeater not working (4.4.1 (a) (ii)) | 3 |
| Service brake efficiency below requirements |1.2.2 |a| |i|| | 3 |
| Offside Front Front suspension has excessive play in a lower suspension ball joint |2.5.B.1a| | 3 |
| Nearside Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 3 |
| Nearside Front Position lamp not working |4.2.1 |a|| | 3 |
| Offside Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 3 |