| Most common failures | No# failures |
|---|
| Service brake: efficiency below requirements |3.7.B.7| | 13 |
| Nearside Stop lamp not working |1.2.1b| | 12 |
| Offside Stop lamp not working |1.2.1b| | 12 |
| Parking brake: efficiency below requirements |3.7.B.7| | 11 |
| Headlamp aim out of alignment | 10 |
| Rear Stop lamp not working |1.2.1b| | 9 |
| Offside Headlamp not working on main beam |1.7.5a| | 8 |
| Service brake: efficiency below requirements |3.7.C.1a| | 7 |
| Horn not working |1.6.2a| | 7 |
| Nearside Front position lamp|s| not working |1.1.A.3b| | 6 |
| Stop lamp remains on when the brakes are released | 6 |
| Rear parking brake recording little or no effort | 6 |
| Offside Headlamp not working on dipped beam |1.7.5a| | 6 |
| Nearside Front Axle king pin has excessive play in pin and/or bush adversely affecting the steering |2.5.A.3a| | 6 |
| Fuel system component leaking |7.2.3| | 5 |
| Registration plate lamp issues | 5 |
| Offside Semaphore indicator arm does not extend smoothly |1.4.C.1a| | 4 |
| Brakes imbalanced across an axle | 4 |
| Stop lamp not working |1.2.1b| | 4 |
| Nearside Headlamp not working on main beam |1.7.5a| | 4 |
| Offside Front Drag link end ball joint has excessive play |2.2.B.1f| | 3 |
| Nearside front brake recording little or no effort |3.7.B.5a| | 3 |
| Offside front brake recording little or no effort |3.7.B.5a| | 3 |
| Steering system has excessive free play detected at the steering wheel |steering box fitted| |2.2.A.1a| | 3 |
| Centre Stop lamp not working |1.2.1b| | 3 |
| Fuel cap/sealing device sealing washer missing |7.2.4c| | 3 |
| Offside Front Axle king pin has excessive play in pin and/or bush adversely affecting the steering |2.5.A.3a| | 3 |
| Nearside Semaphore indicator arm does not extend smoothly |1.4.C.1a| | 3 |
| Nearside Rear Suspension spring mounting prescribed area is excessively corroded |2.4.A.3| | 3 |
| Steering box insecure |2.2.B.1a| | 3 |
| Nearside Front Headlamp not working on dipped beam |1.7.5a| | 3 |
| Nearside Rear rear brake recording little or no effort |3.7.B.5a| | 2 |
| Nearside Rear position lamp|s| excessively deteriorated so that it is not visible from a reasonable distance |1.1.A.3d| | 2 |
| Nearside Front Direction indicator not working |1.4.A.2c| | 2 |
| Dipswitch operation does not deflect all main beam headlamps to make them dipped beams |1.7.4b| | 2 |
| Nearside Rear Stop lamp not working |1.2.1b| | 2 |
| Offside Rear Stop lamp not working |1.2.1b| | 2 |
| Nearside Front Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2| | 2 |
| Offside Front Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2| | 2 |
| Offside Rear position lamp|s| not working |1.1.A.3b| | 2 |
| Rear reflector missing |1.5.1a| | 2 |
| Nearside Front Steering pivot point has excessive play |2.2.B.1g| | 2 |
| Nearside Front Shock absorber insecure |2.7.2b| | 2 |
| Nearside Front wheel bearing rough when rotated |2.5.A.2| | 2 |
| Nearside Front Shock absorber has an excessively worn bush |2.7.4| | 2 |
| Steering system excessively tight |2.2.D.1| | 2 |
| Nearside Front wheel bearing has excessive play |2.5.A.3c| | 2 |
| Offside rear brake recording little or no effort |3.7.B.5a| | 2 |
| Trikes, quads or pre-68 vehicles, service brake efficiency below requirements |3.7.C.1a| | 2 |
| Parking brake lever has no reserve travel |3.1.6b| | 2 |
| Nearside Front front brake recording little or no effort |3.7.B.5a| | 2 |
| Offside Front front brake recording little or no effort |3.7.B.5a| | 2 |
| Service brake is causing the vehicle to swerve to the nearside |3.7.C.2| | 2 |
| Brake pedal anti-slip provision missing |3.3.A.1b| | 2 |
| Brake hose excessively deteriorated | 2 |
| Nearside Rear Shock absorber has a serious fluid leak |2.7.3| | 2 |
| Offside Front position lamp|s| not working |1.1.A.3b| | 2 |
| Offside Front Headlamp not in good working order |not working| |1.2.4a| | 1 |
| Nearside Front Leaf spring to axle securing nut insecure |2.4.B.7b| | 1 |
| Offside Front Leaf spring to axle securing nut insecure |2.4.B.7b| | 1 |
| Offside Front Brake relay lever excessively worn and seriously weakened |3.5.1e| | 1 |
| Centre Brake relay lever excessively worn and seriously weakened |3.5.1e| | 1 |
| Parking brake: efficiency below requirements |3.7.C.1b| | 1 |
| Offside Front Headlamp excessively deteriorated so that the light output is severely reduced |1.7.5a| | 1 |
| Centre Brake cable locking device insecure |3.5.1l| | 1 |
| Front Trailing arm locating pin retaining device not properly locked |2.4.G.3b| | 1 |
| Nearside Rear Brake cable has restricted free movement |3.5.1k| | 1 |
| Nearside Front Brake cable locking device missing |3.5.1l| | 1 |
| Nearside Headlamp excessively damaged so that the light output is severely reduced |1.7.5a| | 1 |
| Nearside Front Front wheel bearing rough when rotated |2.5.A.2| | 1 |
| Nearside Front Wheel nut|s| loose |4.2.A.1e| | 1 |
| Nearside Rear brake drum insecure |3.5.1i| | 1 |
| Rear Fuel hose excessively damaged |7.2.2| | 1 |
| Offside Front Torsion bar attachment bracket loose |2.4.E.4a| | 1 |
| Offside Tie bar/rod insecure |2.4.G.1| | 1 |
| Offside Front Headlamp not working on dipped beam |1.7.5a| | 1 |
| Offside Inner Suspension arm has excessive play in a pin/bush |2.4.G.2| | 1 |
| Windscreen wiper not operating over a large enough area to give an adequate view |8.2.1c| | 1 |
| Offside Front Front position lamp|s| not working |1.1.A.3b| | 1 |
| Front Dipswitch operation does not deflect all main beam headlamps to make them dipped beams |1.7.4b| | 1 |
| Front Front position lamp|s| adversely affected by the operation of another lamp |1.1.A.3f| | 1 |
| Offside Rear Shock absorber has an excessively worn bush |2.7.4| | 1 |
| Offside Front Windscreen wiper blade missing |8.2.2| | 1 |
| Nearside Rear Braking system leaking |3.6.A.1| | 1 |
| Brake pipe inadequately clipped |3.6.B.1| | 1 |
| Rear Shock absorber insecure |2.7.2b| | 1 |
| Offside Front Steering locking device missing |2.2.C.1g| | 1 |
| Steering box has relative movement between sector shaft and the drop arm |2.2.B.1b| | 1 |
| Front Trailing arm insecure |2.4.G.1| | 1 |
| Nearside Headlamp excessively deteriorated so that the light output is severely reduced |1.7.5a| | 1 |
| Offside Rear position lamp|s| excessively deteriorated so that it is not visible from a reasonable distance |1.1.A.3d| | 1 |
| Registration plate issues | 1 |
| Front Windscreen wiper not operating automatically when switched on |8.2.1b| | 1 |
| Offside Front Leaf spring anchor bracket loose |2.4.B.6a| | 1 |
| Nearside Steering pivot point has excessive play |2.2.B.1g| | 1 |
| Nearside Front An item not tested |Manual| | 1 |
| Offside Front An item not tested |Manual| | 1 |
| Nearside Rear An item not tested |Manual| | 1 |
| Offside Rear An item not tested |Manual| | 1 |
| Brake clevis joint locking device insecure |3.5.1l| | 1 |
| Nearside Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2| | 1 |
| Front position lamp|s| not working |1.1.A.3b| | 1 |
| Nearside Rear position lamp|s| not working |1.1.A.3b| | 1 |
| Offside Front wheel bearing rough when rotated |2.5.A.2| | 1 |
| Offside Front Shock absorber has an excessively worn bush |2.7.4| | 1 |
| Offside Front Shock absorber insecure |2.7.2b| | 1 |
| Nearside Rear Shock absorber insecure |2.7.2b| | 1 |
| Front Steering system fouling |2.2.D.2a| | 1 |
| Offside Front Steering system fouling |2.2.D.2a| | 1 |
| Offside Stop lamp adversely affected by the operation of another lamp |1.2.1f| | 1 |
| Nearside Headlamp does not operate immediately when selected on dipped beam |1.7.4a| | 1 |
| Offside Rear reflector missing |1.5.1a| | 1 |
| Offside Headlamps matched pair are incorrectly positioned |1.7.3| | 1 |
| Front Obligatory mirror missing |8.1.1| | 1 |
| Front Leaf spring saddle is moving relative to the spring |2.4.B.7a| | 1 |
| Nearside Semaphore indicator arm arm does not show an amber light to the front |1.4.C.1b| | 1 |
| Nearside Semaphore indicator arm arm does not show an amber light to the rear |1.4.C.1b| | 1 |
| Rear brake application uneven | 1 |
| Suspension spring mounting prescribed area is excessively corroded |2.4.A.3| | 1 |
| Nearside Rear Brake clevis joint locking device missing |3.5.1l| | 1 |
| Offside Rear Brake clevis joint locking device missing |3.5.1l| | 1 |
| Steering locking device missing |2.2.C.1g| | 1 |
| Offside front parking brake recording little or no effort |3.7.B.6a| | 1 |
| Front brake application uneven | 1 |
| Offside Headlamp excessively damaged so that the light output is severely reduced |1.7.5a| | 1 |
| Nearside Rear All position lamps not in good working order |function impaired| |1.1.A.2a| | 1 |
| Nearside Vehicle structure is cracked, seriously affecting its strength within 30cm of the body mountings |6.1.B.2| | 1 |
| Front Brake linkage has abnormal movement of levers indicating maladjustment |3.5.1f| | 1 |
| Rear Brake linkage has abnormal movement of levers indicating maladjustment |3.5.1f| | 1 |
| Parking brake efficiency below requirements |3.7.C.1b| | 1 |
| Nearside Stop lamp adversely affected by the operation of another lamp |1.2.1f| | 1 |
| Nearside Rear position lamp|s| adversely affected by the operation of another lamp |1.1.A.3f| | 1 |
| Nearside Axle king pin has excessive play in pin and/or bush adversely affecting the steering |2.5.A.3a| | 1 |
| Brake rod has restricted free movement |3.5.1k| | 1 |
| Exhaust emits excessive dense blue smoke during acceleration |7.3.A.2c| | 1 |
| Steering wheel retaining device insecure |2.1.6| | 1 |
| Fuel tank leaking |7.2.3| | 1 |
| Offside Rear Suspension arm attachment bracket/mounting insecure |2.4.G.1| | 1 |
| Exhaust has a major leak of exhaust gases |7.1.2| | 1 |
| Nearside Drag link end ball joint has excessive play |2.2.B.1f| | 1 |
| Offside Drag link end ball joint has excessive play |2.2.B.1f| | 1 |
| Nearside Front Drag link end ball joint has excessive play |2.2.B.1f| | 1 |
| Offside Rear Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2| | 1 |
| Nearside Front front brake binding |3.7.B.1| | 1 |
| Offside Front front brake binding |3.7.B.1| | 1 |
| Nearside Rear position lamp|s| incorrect colour |1.1.A.3e| | 1 |
| Driver`s seat insecure |6.2.A.1| | 1 |
| Front passenger seat insecure |6.2.3| | 1 |
| Front Windscreen wiper blade missing |8.2.2| | 1 |
| Front Steering wheel retaining device insecure |2.1.6| | 1 |
| Nearside Front Headlamp aim not tested |1.8.A.1c| | 1 |
| Offside Front Leaf spring to axle securing nut missing |2.4.B.7b| | 1 |
| Offside Rear Shock absorber has a serious fluid leak |2.7.3| | 1 |
| Offside Front Front wheel bearing rough when rotated |2.5.A.2| | 1 |
| Offside Rear Rear wheel bearing has excessive play |2.6.2| | 1 |
| Offside Rear brake drum contaminated by oil |3.5.1h| | 1 |
| Offside Rear Shock absorber has negligible damping effect |2.7.5| | 1 |
| Nearside Rear Shock absorber has negligible damping effect |2.7.5| | 1 |
| Offside Track rod end ball joint has excessive play |2.2.B.1f| | 1 |
| Nearside Headlamp insecure |1.7.3| | 1 |
| Offside Headlamp insecure |1.7.3| | 1 |
| Brake pedal has insufficient reserve movement |3.3.A.5| | 1 |
| Steering column top mounting bracket insecure |2.1.2d| | 1 |
| Nearside Rear Trikes, quads or pre-68 vehicles, service brake efficiency below requirements |3.7.C.1a| | 1 |
| Offside Rear Trikes, quads or pre-68 vehicles, service brake efficiency below requirements |3.7.C.1a| | 1 |
| Offside Front Trikes, quads or pre-68 vehicles, service brake efficiency below requirements |3.7.C.1a| | 1 |
| Brake relay lever has restricted free movement |3.5.1k| | 1 |
| Offside Front Anti-roll bar locating pin locking device missing |2.4.G.3b| | 1 |
| Fuel pipe union leaking |7.2.3| | 1 |
| Nearside Front Steering arm has relative movement at its fixings |2.2.B.1h| | 1 |
| Offside Rear front brake recording little or no effort |3.7.B.5a| | 1 |
| Position lamp switch faulty |1.1.A.1| | 1 |
| Service brake is causing the vehicle to swerve to the offside |3.7.C.2| | 1 |
| Nearside Front Leaf spring has a deteriorated anchor pin rubber bush resulting in excessive movement |2.4.B.2| | 1 |
| Nearside Windscreen wiper not operating automatically when switched on |8.2.1b| | 1 |
| Offside Windscreen wiper not operating automatically when switched on |8.2.1b| | 1 |
| Braking system leaking |3.6.A.1| | 1 |
| Front Braking system leaking |3.6.A.1| | 1 |
| Offside Rear Rear position lamp|s| incorrect colour |1.1.A.3e| | 1 |
| Nearside rear brake recording little or no effort |3.7.B.5a| | 1 |
| Offside Pre 1950 headlamp aimed so that it dazzles other road users |1.6.A1| | 1 |
| Position lamp switch insecure |1.1.A.1| | 1 |
| Offside Brake lever has restricted free movement |3.5.1k| | 1 |