| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 149 |
| Windscreen wiper does not clear the windscreen effectively | 106 |
| Brake pipe excessively corroded | 104 |
| Horn not working |1.6.2a| | 47 |
| Registration plate lamp issues | 46 |
| Brakes imbalanced across an axle | 40 |
| Parking brake efficiency below requirements (1.4.2 (a) (i)) | 17 |
| Offside Rear fog lamp not working |1.3.2b| | 17 |
| Parking brake: efficiency below requirements |3.7.B.7| | 14 |
| Windscreen washer not working | 14 |
| Rear parking brake recording little or no effort | 13 |
| Horn not working (7.7 (a)) | 13 |
| Offside Stop lamp not working |1.2.1b| | 13 |
| Nearside Stop lamp not working |1.2.1b| | 12 |
| Horn not working (7.7 (a) (ii)) | 11 |
| Nearside Front position lamp|s| not working |1.1.A.3b| | 11 |
| Service brake efficiency below requirements (1.2.2 (a) (i)) | 11 |
| Exhaust system not adequately supported |7.1.1| | 11 |
| Registration plate issues | 10 |
| Offside Rear Direction indicator incorrect colour |1.4.A.2f| | 10 |
| Rear brake binding | 9 |
| Offside Front position lamp|s| not working |1.1.A.3b| | 9 |
| Nearside Rear Direction indicator incorrect colour |1.4.A.2f| | 9 |
| Nearside Rear Service brake excessively binding (1.2.1 (f)) | 9 |
| Rear fog lamp not working |1.3.2b| | 8 |
| Service brake: efficiency below requirements |3.7.B.7| | 8 |
| Offside Front Position lamp not working (4.2.1 (a) (ii)) | 8 |
| Nearside Front Direction indicator incorrect colour |1.4.A.2f| | 7 |
| Offside Front Direction indicator incorrect colour |1.4.A.2f| | 7 |
| Nearside Front Suspension component mounting prescribed area is excessively corroded |2.4.A.3| | 7 |
| Battery insecure |1.9.1| | 7 |
| Nearside Headlamp aim beam image kick up to the offside |1.8| | 7 |
| Offside Rear Rear fog lamp not working |1.3.2b| | 7 |
| Brake hose excessively deteriorated | 6 |
| Nearside Rear Outline marker lamp not working (4.2.1 (a) (ii)) | 6 |
| Offside Headlamp aim beam image kick up to the offside |1.8| | 6 |
| Nearside Rear Shock absorber has a serious fluid leak |2.7.3| | 6 |
| Offside Headlamp not working on dipped beam |1.7.5a| | 5 |
| Front Vehicle structure has excessive corrosion which adversely affects braking or steering |6.1.A.1| | 5 |
| Nearside Rear Stop lamp(s) not working (4.3.1 (a) (ii)) | 5 |
| Offside Front Suspension component mounting prescribed area is excessively corroded |2.4.A.3| | 5 |
| Windscreen has damage | 5 |
| Hazard warning switch faulty |1.4.B.1d| | 5 |
| Offside Front Subframe mounting prescribed area is excessively corroded |2.4.A.3| | 5 |
| Offside Rear position lamp|s| not working |1.1.A.3b| | 5 |
| Offside Rear Position lamp not working (4.2.1 (a) (ii)) | 5 |
| Offside Headlamp aim beam image obviously incorrect |1.8.A.1b| | 4 |
| Offside Front Suspension component mounting prescribed area excessively corroded significantly reducing structural strength (5.3.6 (a) (i)) | 4 |
| Nearside Rear Upper Position lamp not working (4.2.1 (a) (ii)) | 4 |
| Offside Front Service brake excessively binding (1.2.1 (f)) | 4 |
| Nearside Rear Position lamp not working (4.2.1 (a) (ii)) | 4 |
| Rear fog lamp not working (4.5.1 (a) (ii)) | 4 |
| Exhaust has a major leak of exhaust gases |7.1.2| | 4 |
| Rear brake application uneven | 4 |
| Nearside Front Position lamp not working (4.2.1 (a) (ii)) | 4 |
| Front brake disc in such a condition that it is seriously weakened | 4 |
| Nearside Front Subframe mounting prescribed area is excessively corroded |2.4.A.3| | 4 |
| Nearside Rear Rear wheel bearing has excessive play |2.6.2| | 4 |
| Nearside Rear position lamp|s| not working |1.1.A.3b| | 4 |
| Offside Front Shock absorber has a serious fluid leak |2.7.3| | 4 |
| Offside Rear Shock absorber has a serious fluid leak |2.7.3| | 4 |
| Offside Front wheel bearing has excessive play |2.5.A.3c| | 4 |
| Rear Mechanical brake component has restricted free movement | 4 |
| Offside Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 3 |
| Headlamp aim beam image kick up to the offside |1.8| | 3 |
| Nearside Rear Rear position lamp|s| not working |1.1.A.3b| | 3 |
| Offside Rear Service brake excessively binding (1.2.1 (f)) | 3 |
| Offside Rear position lamp|s| adversely affected by the operation of another lamp |1.1.A.3f| | 3 |
| Offside Rear fog lamp not working (4.5.1 (a) (ii)) | 3 |
| Exhaust system insecure (6.1.2 (a)) | 3 |
| Nearside Rear Wheel bearing rough when rotated (5.1.3 (b) (i)) | 3 |
| Nearside Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 3 |
| Nearside Front Subframe mounting prescribed area excessively corroded significantly reducing structural strength (5.3.6 (a) (i)) | 3 |
| Nearside Front wheel bearing has excessive play |2.5.A.3c| | 3 |
| Nearside Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 3 |
| Hazard warning switch inoperative (4.4.2 (a) (ii)) | 3 |
| Nearside Rear Stop lamp not working |1.2.1b| | 3 |
| Offside Rear Stop lamp not working |1.2.1b| | 3 |
| Offside Front Direction indicator not working (4.4.1 (a) (ii)) | 3 |
| Offside Front Front constant velocity joint gaiter insecure to the extent that it no longer prevents the ingress of dirt etc |2.5.C.1a| | 3 |
| Offside Front Suspension component mounting prescribed area excessively corroded significantly reducing structural strength inner wing (5.3.6 (a) (i)) | 3 |
| Offside Front Suspension spring mounting prescribed area is excessively corroded |2.4.A.3| | 3 |
| Nearside Front Suspension spring mounting prescribed area is excessively corroded |2.4.A.3| | 3 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 3 |
| Offside Front Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 3 |
| Offside Front Headlamp aim beam image obviously incorrect |1.8.A.1b| | 3 |
| Nearside Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 3 |
| Nearside Rear Road wheel fixing missing (5.2.1 (a) (i)) | 3 |
| Offside Rear Direction indicator incorrect colour (4.4.3 (a)) | 3 |
| Front Suspension component mounting prescribed area is excessively corroded |2.4.A.3| | 3 |
| Nearside Stop lamp adversely affected by the operation of another lamp |1.2.1f| | 3 |
| Offside Front Seat belt anchorage prescribed area strength or continuity significantly reduced (7.1.1 (a) (i)) | 3 |
| Offside Rear Rear fog lamp not working (4.5.1 (a) (ii)) | 3 |
| Nearside Front Headlamp not working on dipped beam |1.7.5a| | 3 |
| Offside Side repeater not working |1.4.A.2c| | 3 |
| Parking brake: efficiency below requirements |3.7.C.1b| | 3 |
| Front brake application uneven | 3 |
| Offside Rear reflector excessively deteriorated so that its function is impaired |1.5.1c| | 3 |
| Offside Front Subframe mounting prescribed area excessively corroded significantly reducing structural strength (5.3.6 (a) (i)) | 3 |
| Nearside Stop lamp(s) not working (4.3.1 (a) (ii)) | 3 |
| Stop lamp(s) all not working (4.3.1 (a) (iii)) | 3 |
| Nearside Headlamp aim beam image obviously incorrect |1.8.A.1b| | 2 |
| Nearside Front Lower Suspension arm ball joint dust cover excessively damaged so that it no longer prevents the ingress of dirt |2.4.G.2| | 2 |
| Offside front brake binding |3.7.B.1| | 2 |
| Nearside Rear Direction indicator adversely affected by the operation of another lamp |1.4.A.2h| | 2 |
| Nearside Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 2 |
| Offside Front Shock absorbers has a serious fluid leak | 2 |
| Offside Rear Service brake excessively binding |1.2.1 |f|| | 2 |
| Nearside Front Outline marker lamp not working (4.2.1 (a) (ii)) | 2 |
| Nearside Front Direction indicators incorrect colour |1.4.A.2f| | 2 |
| Offside Stop lamp adversely affected by the operation of another lamp |1.2.1f| | 2 |
| Offside Stop lamp excessively damaged so that it is not visible from a reasonable distance |1.2.1d| | 2 |
| Nearside Rear Rear position lamp|s| excessively deteriorated so that it is not visible from a reasonable distance |1.1.A.3d| | 2 |
| Windscreen wiper not working (3.4 (a)) | 2 |
| Nearside Position lamp not working (4.2.1 (a) (ii)) | 2 |
| Offside Front Upper Position lamp not working (4.2.1 (a) (ii)) | 2 |
| Nearside Rear Service brake excessively binding |1.2.1 |f|| | 2 |
| Nearside Front Outer Drive shaft joint constant velocity boot split or insecure, no longer prevents the ingress of dirt (6.1.7 (g) (ii)) | 2 |
| Parking brake efficiency less than 50% of the required value (1.4.2 (a) (ii)) | 2 |
| Nearside Front Direction indicator not working |4.4.1 |a| |ii|| | 2 |
| Offside Rear wheel bearing has excessive play |2.6.2| | 2 |
| Offside Front Suspension arm has excessive play in a pin/bush rear bush |2.4.G.2| | 2 |
| Front brake excessively fluctuating | 2 |
| Nearside Headlamp not working on dipped beam |1.7.5a| | 2 |
| Hazard warning lamps inoperative |1.4.B.1b| | 2 |
| Headlamp levelling device inoperative |4.1.5 |a|| | 2 |
| Nearside Front Service brake excessively binding (1.2.1 (f)) | 2 |
| Centre Exhaust system not adequately supported |7.1.1| | 2 |
| Nearside Rear Direction indicators not working |1.4.A.2c| | 2 |
| Nearside Front Lower Suspension arm ball joint dust cover no longer prevents the ingress of dirt (5.3.4 (b) (ii)) | 2 |
| Nearside Upper Front position lamp|s| not working |1.1.A.3b| | 2 |
| Offside Front Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2| | 2 |
| Service brake efficiency less than 50% of the required value (1.2.2 (a) (ii)) | 2 |
| Offside Front Windscreen wiper blade deteriorated |8.2.2| | 2 |
| Nearside Rear Brake pipe leaking on a hydraulic braking system (1.1.11 (b) (ii)) | 2 |
| Brake load sensing valve linkage seized |3.6.E.3| | 2 |
| Centre Exhaust mounting missing |7.1.1b| | 2 |
| Nearside Front Suspension component mounting prescribed area excessively corroded significantly reducing structural strength chassis leg (5.3.6 (a) (i)) | 2 |
| Nearside rear brake recording little or no effort |3.7.B.5a| | 2 |
| Headlamp levelling device inoperative (4.1.5 (a)) | 2 |
| Battery insecure and likely to cause a short circuit (4.13 (a) (ii)) | 2 |
| Nearside Front suspension has excessive play in a lower suspension ball joint |2.5.B.1a| | 2 |
| Centre Stop lamp not working |1.2.1b| | 2 |
| Offside Rear Rear fog lamp adversely affected by the operation of another lamp |1.3.2f| | 2 |
| Offside Front Suspension arm has excessive play in a ball joint |2.4.G.2| | 2 |
| All direction indicators not working (4.4.1 (a) (ii)) | 2 |
| Nearside Front Front position lamp|s| not working |1.1.A.3b| | 2 |
| Offside Rear Rear wheel bearing has excessive play |2.6.2| | 2 |
| Nearside Rear fog lamp emits a light other than red |1.3.2e| | 2 |
| Nearside Front Shock absorbers has a serious fluid leak | 2 |
| Offside Front Inner Drive shaft joint constant velocity boot split or insecure, no longer prevents the ingress of dirt (6.1.7 (g) (ii)) | 2 |
| Stop lamp not working |1.2.1b| | 2 |
| Nearside Rear position lamp|s| adversely affected by the operation of another lamp |1.1.A.3f| | 2 |
| Nearside Front Suspension component mounting prescribed area excessively corroded significantly reducing structural strength (5.3.6 (a) (i)) | 2 |
| Nearside Rear wheel bearing rough when rotated |2.6.1| | 2 |
| Offside Front Front position lamp|s| not working |1.1.A.3b| | 2 |
| Offside Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Nearside Front Suspension component mounting prescribed area excessively corroded significantly reducing structural strength under wheel arch (5.3.6 (a) (i)) | 2 |
| Windscreen wiper blade insecure | 2 |
| Exhaust emissions test not completed because smoke levels are significantly in excess of the specified limit values (8.2.2.2 (f)) | 2 |
| Nearside Direction indicator adversely affected by the operation of another lamp |1.4.A.2h| | 2 |
| Nearside Front Seat belt anchorage prescribed area strength or continuity significantly reduced (7.1.1 (a) (i)) | 2 |
| Offside Rear Stop lamp(s) not working (4.3.1 (a) (ii)) | 2 |
| Nearside Seat belt anchorage prescribed area is excessively corroded |5.2.6| | 2 |
| Offside Seat belt anchorage prescribed area is excessively corroded |5.2.6| | 2 |
| Nearside Front Upper Outline marker lamp not working (4.2.1 (a) (ii)) | 2 |
| Offside Stop lamp(s) not working (4.3.1 (a) (ii)) | 2 |
| Exhaust emissions exceed manufacturers specified limit (8.2.2.2 (a)) | 2 |
| Brake performance not tested |3.7.A.1| | 2 |
| Offside Front Suspension component mounting prescribed area excessively corroded significantly reducing structural strength inner wing |5.3.6 |a| |i|| | 2 |
| Horn not loud enough to be heard by another road user |1.6.2b| | 2 |
| Offside Front Headlamp not working on dipped beam |1.7.5a| | 2 |
| Offside Rear Rear position lamp|s| adversely affected by the operation of another lamp |1.1.A.3f| | 2 |
| Nearside Front Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 2 |
| Offside Rear Wheel bearing has excessive play |5.1.3 |a| |i|| | 2 |
| Brake load sensing valve seized |3.6.E.3| | 2 |
| Power steering pipe|s| or hose|s| excessively corroded |2.3.2| | 2 |
| Nearside Front Lower Suspension arm ball joint dust cover excessively deteriorated so that it no longer prevents the ingress of dirt |2.4.G.2| | 2 |
| Front Exhaust system insecure (6.1.2 (a)) | 2 |
| Rear Exhaust has part of the system excessively deteriorated |7.1.1a| | 2 |
| Horn control missing |1.6.1| | 2 |
| Subframe mounting prescribed area is excessively corroded |2.4.A.3| | 2 |
| Nearside Front Vehicle structure corroded to the extent that the rigidity of the assembly is significantly reduced (6.1.1 (c) (i)) | 2 |