| Most common failures | No# failures |
|---|
| Headlamp aim out of alignment | 398 |
| Windscreen wiper does not clear the windscreen effectively | 250 |
| Registration plate lamp issues | 216 |
| Brake pipe excessively corroded | 152 |
| Exhaust emissions carbon monoxide content after 2nd fast idle excessive |7.3.D.3| | 136 |
| Brakes imbalanced across an axle | 116 |
| Horn not working |1.6.2a| | 113 |
| Exhaust emissions Lambda reading after 2nd fast idle outside specified limits |7.3.D.3| | 106 |
| Service brake: efficiency below requirements |3.7.B.7| | 87 |
| Exhaust emissions carbon monoxide content at idle excessive |7.3.D.4| | 67 |
| Brake hose excessively deteriorated | 66 |
| Offside Rear fog lamp not working |1.3.2b| | 60 |
| Exhaust emissions hydrocarbon content after 2nd fast idle excessive |7.3.D.3| | 48 |
| Rear Exhaust has a major leak of exhaust gases |7.1.2| | 48 |
| Nearside rear brake recording little or no effort |3.7.B.5a| | 44 |
| Registration plate issues | 44 |
| Exhaust has a major leak of exhaust gases |7.1.2| | 41 |
| Rear brake binding | 40 |
| Exhaust system not adequately supported |7.1.1| | 39 |
| Nearside Front position lamp|s| not working |1.1.A.3b| | 39 |
| Centre Exhaust system not adequately supported |7.1.1| | 39 |
| Nearside Stop lamp not working |1.2.1b| | 38 |
| Offside Front position lamp|s| not working |1.1.A.3b| | 38 |
| Offside rear brake recording little or no effort |3.7.B.5a| | 37 |
| Offside Stop lamp not working |1.2.1b| | 37 |
| Nearside Front Brake hose bulging under pressure |3.6.B.3| | 34 |
| Offside Front Brake hose bulging under pressure |3.6.B.3| | 29 |
| Centre Exhaust has a major leak of exhaust gases |7.1.2| | 28 |
| Service brake efficiency below requirements (1.2.2 (a) (i)) | 26 |
| Rear fog lamp not working |1.3.2b| | 26 |
| Exhaust Lambda reading after 2nd fast idle outside specified limits (8.2.1.2 (c)) | 25 |
| Brake load sensing valve linkage seized |3.6.E.3| | 25 |
| Parking brake: efficiency below requirements |3.7.B.7| | 24 |
| Nearside Headlamp insecure |1.7.3| | 23 |
| Offside Rear coil spring incomplete |2.4.C.1a| | 22 |
| Emissions not tested |7.0| | 22 |
| Exhaust carbon monoxide content after 2nd fast idle exceeds default limits (8.2.1.2 (b)) | 22 |
| Horn not working (7.7 (a)) | 22 |
| Rear brake application uneven | 20 |
| Horn not working (7.7 (a) (ii)) | 20 |
| Battery insecure |1.9.1| | 20 |
| Front Exhaust has a major leak of exhaust gases |7.1.2| | 18 |
| Rear Brake load sensing valve linkage seized |3.6.E.3| | 17 |
| Offside Headlamp insecure |1.7.3| | 17 |
| Exhaust carbon monoxide content after 2nd fast idle exceeds manufacturers specified limits (8.2.1.2 (a)) | 16 |
| Horn not working |7.7 |a| |ii|| | 16 |
| Nearside Front Anti-roll bar linkage has excessive play in a pin/bush |2.4.G.2| | 15 |
| Offside Obligatory mirror seriously damaged, affecting the rear view |8.1.2a| | 15 |
| Rear parking brake recording little or no effort | 15 |
| Offside Front Anti-roll bar linkage has excessive play in a pin/bush |2.4.G.2| | 14 |
| Service brake efficiency below requirements |1.2.2 |a| |i|| | 14 |
| Nearside Rear coil spring incomplete |2.4.C.1a| | 14 |
| Offside Front suspension has excessive play in a lower suspension ball joint |2.5.B.1a| | 13 |
| Offside Track rod end ball joint has excessive play |2.2.B.1f| | 13 |
| Brake load sensing valve seized |3.6.E.3| | 13 |
| Offside Rear coil spring fractured |2.4.C.1a| | 13 |
| Offside Rear Rear fog lamp not working |1.3.2b| | 12 |
| Front Exhaust system not adequately supported |7.1.1| | 12 |
| Offside Rear rear brake recording little or no effort |3.7.B.5a| | 12 |
| Offside Front Headlamp insecure |1.7.3| | 11 |
| Offside Front Lower Suspension arm has excessive play in a ball joint |2.4.G.2| | 11 |
| Offside Rear Stop lamp not working |1.2.1b| | 11 |
| Nearside Front Seat belt anchorage prescribed area is excessively corroded |5.2.6| | 11 |
| Offside Rear coil spring broken |2.4.C.1a| | 11 |
| Offside Front Front position lamp|s| not working |1.1.A.3b| | 11 |
| Nearside Rear position lamp|s| not working |1.1.A.3b| | 11 |
| Offside Front constant velocity joint gaiter split |2.5.C.1a| | 11 |
| Windscreen has damage | 10 |
| 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| | 10 |
| Exhaust carbon monoxide content at idle exceeds manufacturers specified limits (8.2.1.2 (b)) | 10 |
| Nearside Front Shock absorber has an excessively worn bush |2.7.4| | 10 |
| Offside Steering rack gaiter split |2.2.D.2d| | 10 |
| Nearside Front suspension has excessive play in a lower suspension ball joint |2.5.B.1a| | 10 |
| Exhaust carbon monoxide content at idle exceeds default limits (8.2.1.2 (b)) | 10 |
| Nearside Rear rear brake recording little or no effort |3.7.B.5a| | 10 |
| Nearside Steering rack gaiter split |2.2.D.2d| | 10 |
| Exhaust emissions carbon monoxide content excessive (8.2.1.2 (b)) | 9 |
| Offside Headlamp not working on dipped beam |1.7.5a| | 9 |
| Nearside Front Front position lamp|s| not working |1.1.A.3b| | 9 |
| Nearside Front Suspension arm ball joint dust cover excessively damaged so that it no longer prevents the ingress of dirt |2.4.G.2| | 9 |
| Central Exhaust has a major leak of exhaust gases |7.1.2| | 9 |
| Nearside Rear coil spring fractured |2.4.C.1a| | 9 |
| Nearside Headlamp insecure |4.1.1 |c|| | 9 |
| Exhaust Lambda reading after 2nd fast idle outside specified limits |8.2.1.2 |c|| | 9 |
| Exhaust carbon monoxide content after 2nd fast idle exceeds default limits |8.2.1.2 |b|| | 9 |
| Exhaust engine idle speed too high |7.3.D.1| | 9 |
| Exhaust hydrocarbon content after 2nd fast idle exceeds default limits (8.2.1.2 (b)) | 9 |
| Exhaust mounting missing |7.1.1b| | 9 |
| Front brake disc in such a condition that it is seriously weakened | 9 |
| Nearside Front Headlamp insecure |1.7.3| | 9 |
| Offside Front Steering rack gaiter split |2.2.D.2d| | 9 |
| Nearside Rear Stop lamp not working |1.2.1b| | 9 |
| Windscreen has a sticker or other obstruction encroaching into the swept area by more than 40mm outside zone `A` |8.3.1e| | 8 |
| Windscreen wiper blade insecure | 8 |
| Emissions not tested (8.2.1.2 (d)) | 8 |
| Offside Rear Rear fog lamp not working (4.5.1 (a) (ii)) | 8 |
| Nearside Rear Position lamp not working (4.2.1 (a) (ii)) | 8 |
| Rear Mechanical brake component has restricted free movement | 8 |
| Offside Stop lamp(s) not working (4.3.1 (a) (ii)) | 8 |
| Brake pedal spongy |3.3.B.1b| | 8 |
| Power steering malfunctioning |2.3.3a| | 8 |
| Exhaust emissions carbon monoxide content excessive |7.3.B.1a| | 8 |
| Offside Front Seat belt anchorage prescribed area is excessively corroded |5.2.6| | 8 |
| Offside Rear fog lamp missing |1.3.2a| | 8 |
| Nearside Rear Suspension component mounting prescribed area is excessively corroded |2.4.A.3| | 8 |
| Offside Rear Brake cable has wires broken and is significantly weakened |3.5.1b| | 8 |
| Front brake application uneven | 8 |
| Offside Headlamp insecure (4.1.1 (c)) | 8 |
| Rear Exhaust system not adequately supported |7.1.1| | 8 |
| Nearside Lower Front suspension ball joint dust cover excessively deteriorated so that it no longer prevents the ingress of dirt |2.4.G.2| | 7 |
| Nearside Front Steering rack gaiter split |2.2.D.2d| | 7 |
| Nearside Front Lower Suspension arm has excessive play in a ball joint |2.4.G.2| | 7 |
| Emissions not tested |7.3.A.1| | 7 |
| Nearside Headlamp insecure (4.1.1 (c)) | 7 |
| Offside Front Lower Suspension arm ball joint excessively worn (5.3.4 (a) (i)) | 7 |
| Nearside Headlamp not working on dipped beam |1.7.5a| | 7 |
| Offside Front Track rod end ball joint has excessive play |2.2.B.1f| | 7 |
| Offside Headlamp not working on main beam |1.7.5a| | 7 |
| Central Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 7 |
| Brake pedal anti-slip provision incomplete |3.3.A.1b| | 7 |
| Rear Exhaust has part of the system excessively deteriorated |7.1.1a| | 7 |
| Rear Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 7 |
| Nearside Front Lower Shock absorber has an excessively worn bush |2.7.4| | 7 |
| Rear fog lamp not working (4.5.1 (a) (ii)) | 7 |
| Offside Front Lower Suspension arm ball joint dust cover excessively damaged so that it no longer prevents the ingress of dirt |2.4.G.2| | 6 |
| Horn not loud enough to be heard by another road user |1.6.2b| | 6 |
| Offside Rear Coil spring fractured or broken (5.3.1 (b) (i)) | 6 |
| Windscreen washer not working | 6 |
| Steering column top mounting bracket insecure |2.1.2d| | 6 |
| Parking brake efficiency below requirements (1.4.2 (a) (i)) | 6 |
| Offside Front Shock absorber has an excessively worn bush |2.7.4| | 6 |
| Rear Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 6 |
| Nearside Front Suspension component mounting prescribed area is excessively corroded |2.4.A.3| | 6 |
| Exhaust has part of the system excessively deteriorated |7.1.1a| | 6 |
| Central Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 6 |
| Nearside Headlamp aim beam image obviously incorrect |1.8.A.1b| | 6 |
| Offside Rear Service brake excessively binding (1.2.1 (f)) | 6 |
| Nearside Front Anti-roll bar linkage pin or bush excessively worn (5.3.4 (a) (i)) | 6 |
| Front Exhaust mounting missing |7.1.1b| | 6 |
| Nearside Front Anti-roll bar has excessive play in a pin/bush |2.4.G.2| | 6 |
| Nearside Rear Service brake effort inadequate at a wheel (1.2.1 (a) (i)) | 6 |
| Offside Rear Service brake effort inadequate at a wheel (1.2.1 (a) (i)) | 6 |
| Nearside Rear Brake cable has wires broken and is significantly weakened |3.5.1b| | 6 |
| Nearside Front constant velocity joint gaiter split |2.5.C.1a| | 6 |
| Nearside Front Anti-roll bar linkage rubber mounting deteriorated resulting in excessive movement |2.4.G.2| | 6 |
| Offside Rear Brake hose bulging under pressure |3.6.B.3| | 6 |
| Front Brake cable has wires broken and is significantly weakened |3.5.1b| | 6 |
| Nearside Rear Brake hose bulging under pressure |3.6.B.3| | 6 |
| Nearside Rear reflector missing |1.5.1a| | 6 |