| Most common failures | No# failures |
|---|
| Windscreen wiper does not clear the windscreen effectively | 442 |
| Brake pipe excessively corroded | 409 |
| Headlamp aim out of alignment | 225 |
| Exhaust emissions Lambda reading after 2nd fast idle outside specified limits |7.3.D.3| | 198 |
| Exhaust emissions carbon monoxide content after 2nd fast idle excessive |7.3.D.3| | 186 |
| Horn not working |1.6.2a| | 126 |
| Brakes imbalanced across an axle | 102 |
| Exhaust emissions carbon monoxide content at idle excessive |7.3.D.4| | 84 |
| Registration plate lamp issues | 67 |
| Exhaust Lambda reading after 2nd fast idle outside specified limits (8.2.1.2 (c)) | 62 |
| Exhaust has a major leak of exhaust gases |7.1.2| | 62 |
| Rear brake binding | 61 |
| Brake hose excessively deteriorated | 60 |
| Exhaust emissions hydrocarbon content after 2nd fast idle excessive |7.3.D.3| | 56 |
| Battery insecure |1.9.1| | 55 |
| Nearside Rear Suspension spring mounting prescribed area is excessively corroded |2.4.A.3| | 50 |
| Offside Rear Shock absorber has a serious fluid leak |2.7.3| | 46 |
| Offside Rear Suspension spring mounting prescribed area is excessively corroded |2.4.A.3| | 44 |
| Service brake: efficiency below requirements |3.7.B.7| | 43 |
| Exhaust carbon monoxide content after 2nd fast idle exceeds default limits (8.2.1.2 (b)) | 40 |
| Offside Front Suspension component mounting prescribed area is excessively corroded |2.4.A.3| | 39 |
| Exhaust system not adequately supported |7.1.1| | 37 |
| Nearside Rear Shock absorber has a serious fluid leak |2.7.3| | 34 |
| Registration plate issues | 33 |
| Nearside Rear Suspension component mounting prescribed area is excessively corroded |2.4.A.3| | 31 |
| Nearside Stop lamp not working |1.2.1b| | 31 |
| Offside Rear Suspension component mounting prescribed area is excessively corroded |2.4.A.3| | 30 |
| Horn not working (7.7 (a) (ii)) | 29 |
| Nearside Front Shock absorber has a serious fluid leak |2.7.3| | 29 |
| Offside Stop lamp not working |1.2.1b| | 29 |
| Windscreen washer not working | 29 |
| Offside Front Subframe mounting prescribed area is excessively corroded |2.4.A.3| | 29 |
| Offside Side repeater not working |1.4.A.2c| | 27 |
| Parking brake: efficiency below requirements |3.7.B.7| | 27 |
| Exhaust Lambda reading after 2nd fast idle outside specified limits |8.2.1.2 |c|| | 26 |
| Offside Rear Direction indicator incorrect colour |1.4.A.2f| | 26 |
| Offside Front Direction indicator incorrect colour |1.4.A.2f| | 24 |
| Rear Exhaust has a major leak of exhaust gases |7.1.2| | 24 |
| Centre Exhaust has a major leak of exhaust gases |7.1.2| | 23 |
| Nearside Front Suspension component mounting prescribed area is excessively corroded |2.4.A.3| | 22 |
| Exhaust carbon monoxide content after 2nd fast idle exceeds manufacturers specified limits (8.2.1.2 (a)) | 22 |
| Emissions not tested |7.0| | 22 |
| Nearside Front Subframe mounting prescribed area is excessively corroded |2.4.A.3| | 21 |
| Horn not working (7.7 (a)) | 20 |
| Centre Exhaust system not adequately supported |7.1.1| | 20 |
| Nearside Rear Direction indicator incorrect colour |1.4.A.2f| | 19 |
| Exhaust carbon monoxide content after 2nd fast idle exceeds default limits |8.2.1.2 |b|| | 18 |
| Nearside Side repeater not working |1.4.A.2c| | 18 |
| Nearside Front Direction indicator incorrect colour |1.4.A.2f| | 18 |
| Offside Rear fog lamp not working |1.3.2b| | 18 |
| Horn not working |7.7 |a| |ii|| | 17 |
| Offside Front Shock absorber has a serious fluid leak |2.7.3| | 17 |
| Service brake efficiency below requirements (1.2.2 (a) (i)) | 17 |
| Offside Front position lamp|s| not working |1.1.A.3b| | 16 |
| Front brake application uneven | 15 |
| Exhaust emissions carbon monoxide content excessive |7.3.B.1a| | 15 |
| Nearside Rear Stop lamp not working |1.2.1b| | 14 |
| Rear brake application uneven | 14 |
| Exhaust hydrocarbon content after 2nd fast idle exceeds default limits (8.2.1.2 (b)) | 14 |
| Nearside Rear wheel bearing rough when rotated |2.6.1| | 14 |
| Emissions not tested (8.2.1.2 (d)) | 13 |
| Fuel system component leaking |7.2.3| | 13 |
| Nearside Rear Body or chassis has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2| | 13 |
| Nearside Rear Service brake excessively binding (1.2.1 (f)) | 13 |
| Offside Rear Stop lamp not working |1.2.1b| | 13 |
| Nearside Headlamp not working on dipped beam |1.7.5a| | 12 |
| Nearside Headlamp not working on main beam |1.7.5a| | 12 |
| Exhaust carbon monoxide content after 2nd fast idle exceeds manufacturer`s specified limits |8.2.1.2 |a|| | 12 |
| Front Exhaust has a major leak of exhaust gases |7.1.2| | 12 |
| Nearside Side repeater not working (4.4.1 (a) (ii)) | 12 |
| Brake performance not tested |3.7.A.1| | 11 |
| Nearside Front Shock absorbers has a serious fluid leak | 11 |
| Exhaust mounting missing |7.1.1b| | 11 |
| Offside Front Seat belt anchorage prescribed area is excessively corroded |5.2.6| | 11 |
| Exhaust has part of the system excessively deteriorated |7.1.1a| | 11 |
| Offside front brake binding |3.7.B.1| | 11 |
| Nearside Front position lamp|s| not working |1.1.A.3b| | 11 |
| Parking brake lever has no reserve travel |3.1.6b| | 11 |
| Nearside Front Direction indicator not working |1.4.A.2c| | 10 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 10 |
| Offside Front Shock absorbers has a serious fluid leak | 10 |
| Windscreen wiper blade insecure | 10 |
| Exhaust hydrocarbon content after 2nd fast idle exceeds manufacturers specified limits (8.2.1.2 (a)) | 10 |
| Exhaust hydrocarbon content after 2nd fast idle exceeds default limits |8.2.1.2 |b|| | 10 |
| Offside Front Side repeater not working |1.4.A.2c| | 10 |
| Offside Rear Shock absorbers has a serious fluid leak | 10 |
| Offside Front Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2| | 10 |
| Exhaust carbon monoxide content at idle exceeds default limits (8.2.1.2 (b)) | 10 |
| Offside Front Service brake excessively binding (1.2.1 (f)) | 10 |
| Offside Front Front wheel bearing has excessive play |2.5.A.3c| | 9 |
| Offside Front wheel bearing has excessive play |2.5.A.3c| | 9 |
| Offside Rear wheel bearing rough when rotated |2.6.1| | 9 |
| Nearside Rear Shock absorbers has a serious fluid leak | 9 |
| Offside Front Body or chassis has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2| | 9 |
| Front brake disc in such a condition that it is seriously weakened | 9 |
| Fuel cap/sealing device sealing washer missing |7.2.4c| | 9 |
| Horn not loud enough to be heard by another road user |1.6.2b| | 9 |
| Nearside Rear Vehicle structure has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2| | 9 |
| Offside Side repeater not working (4.4.1 (a) (ii)) | 8 |
| Nearside Front Direction indicator incorrect colour (4.4.3 (a)) | 8 |
| Offside Front Direction indicator not working |1.4.A.2c| | 8 |
| Rear Exhaust has part of the system excessively deteriorated |7.1.1a| | 8 |
| Offside Front front brake binding |3.7.B.1| | 8 |
| Hazard warning switch faulty |1.4.B.1d| | 8 |
| Nearside Front Seat belt anchorage prescribed area is excessively corroded |5.2.6| | 8 |
| Offside Rear Body or chassis has excessive corrosion, seriously affecting its strength within 30cm of the body mountings |6.1.B.2| | 8 |
| Offside Front Suspension component mounting prescribed area excessively corroded significantly reducing structural strength (5.3.6 (a) (i)) | 8 |
| Centre Exhaust mounting missing |7.1.1b| | 8 |
| Emissions not tested |7.3.A.1| | 8 |
| Offside Front Suspension spring mounting prescribed area is excessively corroded |2.4.A.3| | 8 |
| Nearside front brake binding |3.7.B.1| | 8 |
| Offside Rear Service brake excessively binding (1.2.1 (f)) | 8 |
| Offside Rear Suspension has inadequate clearance with the bump stop |2.4.A.1a| | 7 |
| Nearside Rear Suspension has inadequate clearance with the bump stop |2.4.A.1a| | 7 |
| Battery insecure and likely to fall from carrier (4.13 (a) (ii)) | 7 |
| Nearside Rear position lamp|s| not working |1.1.A.3b| | 7 |
| Nearside Front Service brake excessively binding (1.2.1 (f)) | 7 |
| Exhaust carbon monoxide content at idle exceeds manufacturers specified limits (8.2.1.2 (b)) | 7 |
| Offside Suspension component mounting prescribed area is excessively corroded |2.4.A.3| | 7 |
| Nearside Front Suspension spring mounting prescribed area is excessively corroded |2.4.A.3| | 7 |
| Offside Front Vehicle structure has excessive corrosion which adversely affects braking or steering |6.1.A.1| | 7 |
| Offside Side repeater not working |4.4.1 |a| |ii|| | 7 |
| Nearside Rear wheel bearing has excessive play |2.6.2| | 7 |
| Nearside Rear Wheel bearing has excessive play (5.1.3 (a) (i)) | 7 |