| Most common failures | No# failures |
|---|
| Brake pipe excessively corroded | 90 |
| Headlamp aim out of alignment | 85 |
| Parking brake: efficiency below requirements |3.7.B.7| | 76 |
| Rear parking brake recording little or no effort | 65 |
| Parking brake: efficiency below requirements |3.7.C.1b| | 45 |
| Service brake: efficiency below requirements |3.7.B.7| | 36 |
| Parking brake lever has no reserve travel |3.1.6b| | 36 |
| Windscreen wiper does not clear the windscreen effectively | 34 |
| Nearside Steering rack gaiter split |2.2.D.2d| | 29 |
| Exhaust emissions carbon monoxide content after 2nd fast idle excessive |7.3.D.3| | 25 |
| Offside Steering rack gaiter split |2.2.D.2d| | 25 |
| Brakes imbalanced across an axle | 21 |
| Rear brake disc in such a condition that it is seriously weakened | 20 |
| Front brake disc in such a condition that it is seriously weakened | 19 |
| Exhaust emissions Lambda reading after 2nd fast idle outside specified limits |7.3.D.3| | 18 |
| Offside rear brake recording little or no effort |3.7.B.5a| | 17 |
| Parking brake efficiency below requirements (1.4.2 (a) (i)) | 17 |
| Nearside rear brake recording little or no effort |3.7.B.5a| | 15 |
| Parking brake efficiency less than 50% of the required value (1.4.2 (a) (ii)) | 14 |
| Offside Rear wheel bearing rough when rotated |2.6.1| | 14 |
| Exhaust has a major leak of exhaust gases |7.1.2| | 13 |
| All position lamps not working |1.1.A.3b| | 13 |
| Service brake efficiency below requirements (1.2.2 (a) (i)) | 11 |
| Nearside Rear wheel bearing rough when rotated |2.6.1| | 11 |
| Nearside Headlamp not working on dipped beam |1.7.5a| | 11 |
| Offside Headlamp not working on dipped beam |1.7.5a| | 10 |
| Rear brake binding | 9 |
| Service brake: efficiency below requirements |3.7.C.1a| | 8 |
| Parking brake efficiency below requirements |1.4.2 |a| |i|| | 8 |
| Registration plate lamp issues | 8 |
| Hazard warning lamps not flashing in phase, with ignition on |1.4.B.1f| | 7 |
| Hazard warning lamps not flashing in phase, with ignition off |1.4.B.1f| | 7 |
| Nearside Rear Rear wheel bearing rough when rotated |2.6.1| | 6 |
| Parking brake efficiency below requirements |3.7.C.1b| | 6 |
| Nearside Front Steering rack gaiter split |2.2.D.2d| | 6 |
| Exhaust Lambda reading after 2nd fast idle outside specified limits (8.2.1.2 (c)) | 6 |
| Service brake efficiency less than 50% of the required value (1.2.2 (a) (ii)) | 6 |
| Rear fog lamp not working |1.3.2b| | 6 |
| Hazard warning lamps inoperative |1.4.B.1b| | 6 |
| Front Exhaust has a major leak of exhaust gases |7.1.2| | 6 |
| Parking brake efficiency less than 50% of the required value |1.4.2 |a| |ii|| | 6 |
| Exhaust emissions carbon monoxide content at idle excessive |7.3.D.4| | 5 |
| Nearside Rear wheel bearing has excessive play |2.6.2| | 5 |
| Nearside Front Headlamp insecure |1.7.3| | 5 |
| Offside Front Steering rack gaiter split |2.2.D.2d| | 5 |
| Offside Rear brake caliper leaking |3.6.A.1| | 5 |
| Nearside Steering rack gaiter missing or no longer prevents the ingress of dirt |2.1.3 |g| |ii|| | 5 |
| Parking brake lever has excessive movement indicating incorrect adjustment (1.1.6 (c)) | 5 |
| Nearside Rear Rear wheel bearing has excessive play |2.6.2| | 5 |
| Service brake efficiency below requirements |1.2.2 |a| |i|| | 5 |
| Nearside Rear rear brake recording little or no effort |3.7.B.5a| | 5 |
| Offside Rear rear brake recording little or no effort |3.7.B.5a| | 5 |
| Brake hose damaged | 5 |
| Nearside Rear brake caliper leaking |3.6.A.1| | 4 |
| Offside Rear wheel bearing has excessive play |2.6.2| | 4 |
| Rear Exhaust has a major leak of exhaust gases |7.1.2| | 4 |
| Offside Front Headlamp not working on dipped beam |1.7.5a| | 4 |
| Nearside Rear position lamp|s| not working |1.1.A.3b| | 4 |
| Hazard warning tell tale not working correctly |1.4.B.1e| | 4 |
| Direction indicators not working |1.4.A.2c| | 4 |
| Speedometer clearly inoperative |6.7.2| | 4 |
| Exhaust carbon monoxide content after 2nd fast idle exceeds default limits (8.2.1.2 (b)) | 4 |
| Offside Front Steering rack gaiter missing or no longer prevents the ingress of dirt (2.1.3 (g) (ii)) | 4 |
| Offside Headlamp aim beam image obviously incorrect |1.8.A.1b| | 4 |
| Offside Rear fog lamp not working |1.3.2b| | 4 |
| Trikes, quads or pre-68 vehicles, service brake efficiency below requirements |3.7.C.1a| | 4 |
| Offside Stop lamp not working |1.2.1b| | 4 |
| Nearside Steering rack gaiter missing or no longer prevents the ingress of dirt (2.1.3 (g) (ii)) | 3 |
| Rear Exhaust system not adequately supported |7.1.1| | 3 |
| Offside Obligatory mirror missing |8.1.1| | 3 |
| Nearside Front Front position lamp|s| not working |1.1.A.3b| | 3 |
| Offside Front Front position lamp|s| not working |1.1.A.3b| | 3 |
| Offside Rear Rear position lamp|s| not working |1.1.A.3b| | 3 |
| Nearside Front Headlamp not working on dipped beam |1.7.5a| | 3 |
| Offside Front Obligatory mirror missing |8.1.1| | 3 |
| Brake hose has insufficient room to move | 3 |
| Battery insecure |1.9.1| | 3 |
| Exhaust emissions hydrocarbon content after 2nd fast idle excessive |7.3.D.3| | 3 |
| Nearside Stop lamp not working |1.2.1b| | 3 |
| Emissions not tested (8.2.1.2 (d)) | 3 |
| Offside Steering rack gaiter missing or no longer prevents the ingress of dirt |2.1.3 |g| |ii|| | 3 |
| Offside 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 |
| Rear Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 3 |
| Nearside Headlamp not working on main beam |1.7.5a| | 3 |
| Exhaust system not adequately supported |7.1.1| | 3 |
| Windscreen washer not working | 3 |
| Nearside Front Track rod end ball joint dust cover excessively damaged so that it no longer prevents the ingress of dirt |2.2.C.1c| | 3 |
| Offside Rear Shock absorber has a serious fluid leak |2.7.3| | 3 |
| Offside Rear Rear wheel bearing rough when rotated |2.6.1| | 3 |
| Front brake application uneven | 3 |
| Nearside Headlamp insecure |1.7.3| | 3 |
| Offside Headlamp insecure |1.7.3| | 3 |
| Front Bumper insecure (6.1.4 (a) (i)) | 3 |
| Front Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 3 |
| Rear fog lamp tell tale not working |1.3.1b| | 3 |
| Nearside Front position lamp|s| not working |1.1.A.3b| | 3 |
| Nearside Front wheel bearing rough when rotated |2.5.A.2| | 3 |
| Offside Rear Brake clevis joint has restricted free movement |3.5.1k| | 3 |
| Nearside Front Steering rack gaiter missing or no longer prevents the ingress of dirt |2.1.3 |g| |ii|| | 3 |
| Offside Track rod end ball joint dust cover excessively deteriorated so that it no longer prevents the ingress of dirt |2.2.C.1c| | 3 |
| Hazard warning switch faulty |1.4.B.1d| | 3 |
| Parking brake lever has excessive movement indicating incorrect adjustment |1.1.6 |c|| | 2 |
| Nearside Parking brake inoperative on one side (1.4.1 (a)) | 2 |
| Nearside Rear Direction indicator incorrect colour (4.4.3 (a)) | 2 |
| Offside Rear Service brake excessively binding (1.2.1 (f)) | 2 |
| rear brake recording little or no effort |3.7.B.5a| | 2 |
| Service brake is causing the steering wheel to severely pull one way |3.7.C.2| | 2 |
| Offside Front Brake hose excessively damaged |3.6.B.4d| | 2 |
| Windscreen has damage | 2 |
| Front Body insecure and dangerous to other road users |6.1.B.1b| | 2 |
| Offside Rear Rear wheel bearing has excessive play |2.6.2| | 2 |
| Front Sub-frame corroded and seriously weakened |2.4.G.1| | 2 |
| Brake hose excessively deteriorated | 2 |
| Brake lever has insufficient reserve travel (1.1.2 (a)) | 2 |
| Nearside Rear Brake disc significantly and obviously worn (1.1.14 (a) (i)) | 2 |
| Offside Front Wheel bearing has excessive play |5.1.3 |a| |i|| | 2 |
| Exhaust Lambda reading after 2nd fast idle outside specified limits |8.2.1.2 |c|| | 2 |
| Nearside Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 2 |
| Offside Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 2 |
| Rear Service brake effort inadequate at a wheel both (1.2.1 (a) (i)) | 2 |
| Rear Parking (secondary brake) on a single line braking system has inadequate effort at a wheel both (1.3.1 (a) (i)) | 2 |
| Exhaust emissions likely to be affected by an exhaust leak (8.2.1.1 (b)) | 2 |
| Offside Headlamp not working on main beam |1.7.5a| | 2 |
| Offside Front Headlamp insecure |1.7.3| | 2 |
| Brake performance not tested |3.7.A.1| | 2 |
| Horn not working |1.6.2a| | 2 |
| Offside Rear position lamp|s| not working |1.1.A.3b| | 2 |
| Exhaust has a major leak of exhaust gases |6.1.2 |a|| | 2 |
| Nearside Rear Service brake effort inadequate at a wheel |1.2.1 |a| |i|| | 2 |
| Offside Rear Service brake effort inadequate at a wheel |1.2.1 |a| |i|| | 2 |
| Offside Obligatory mirror seriously damaged, affecting the rear view |8.1.2a| | 2 |
| Nearside Front Lower Suspension component ball joint excessively worn (5.3.4 (a) (i)) | 2 |
| Offside Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 2 |
| Offside Front Subframe mounting prescribed area excessively corroded significantly reducing structural strength (5.3.6 (a) (i)) | 2 |
| Nearside Front Shock absorber has a serious fluid leak |2.7.3| | 2 |
| Exhaust carbon monoxide content at idle exceeds manufacturers specified limits (8.2.1.2 (b)) | 2 |
| Offside Rear Brake cable has restricted free movement |3.5.1k| | 2 |
| Nearside Front Steering rack gaiter missing or no longer prevents the ingress of dirt (2.1.3 (g) (ii)) | 2 |
| Parking (secondary brake) on a single line braking system imbalanced across an axle Axle 1 (1.3.1 (b) (i)) | 2 |
| Offside Steering rack gaiter missing or no longer prevents the ingress of dirt (2.1.3 (g) (ii)) | 2 |
| Offside Rear Brake disc fractured (1.1.14 (a) (ii)) | 2 |
| Offside Front Headlamp insecure (4.1.1 (c)) | 2 |
| Rear Bumper insecure (6.1.4 (a) (i)) | 2 |
| Nearside Front Headlamp not working on main beam |1.7.5a| | 2 |
| Offside Front Lower Suspension arm ball joint dust cover no longer prevents the ingress of dirt |5.3.4 |b| |ii|| | 2 |
| Service brake efficiency less than 50% of the required value |1.2.2 |a| |ii|| | 2 |
| Offside Rear Braking system leaking |3.6.A.1| | 2 |
| Offside Front wheel bearing rough when rotated |2.5.A.2| | 2 |
| Nearside Headlamp has a product on the lens so that the light output is severely reduced |1.7.5a| | 2 |
| Offside Headlamp has a product on the lens so that the light output is severely reduced |1.7.5a| | 2 |
| Nearside Parking brake inoperative on one side |1.4.1 |a|| | 2 |
| Nearside Rear brake caliper has restricted free movement |3.5.1k| | 2 |
| Front brake excessively fluctuating | 2 |
| Offside Front Steering rack gaiter missing or no longer prevents the ingress of dirt |2.1.3 |g| |ii|| | 2 |