| Most common failures | No# failures |
|---|
| Registration plate lamp issues | 485 |
| Headlamp aim out of alignment | 369 |
| Windscreen wiper does not clear the windscreen effectively | 272 |
| Brake pipe excessively corroded | 227 |
| Nearside Front position lamp|s| not working |1.1.A.3b| | 122 |
| Brakes imbalanced across an axle | 111 |
| Offside Front position lamp|s| not working |1.1.A.3b| | 102 |
| Exhaust emits an excessive level of metered smoke for a turbo charged engine |7.4.B.3b| | 102 |
| Rear brake binding | 99 |
| Front brake disc in such a condition that it is seriously weakened | 87 |
| Supplementary Restraint System warning lamp indicates a fault |5.4.2| | 80 |
| Offside Stop lamp not working |1.2.1b| | 71 |
| Nearside Stop lamp not working |1.2.1b| | 57 |
| Offside Headlamp aim beam image obviously incorrect |1.8.A.1b| | 54 |
| Registration plate issues | 51 |
| Rear Exhaust system not adequately supported |7.1.1| | 50 |
| Offside Front Position lamp not working (4.2.1 (a) (ii)) | 47 |
| Nearside Headlamp aim beam image obviously incorrect |1.8.A.1b| | 45 |
| Parking brake: efficiency below requirements |3.7.B.7| | 44 |
| Nearside Front Position lamp not working (4.2.1 (a) (ii)) | 40 |
| Nearside Headlamp not working on dipped beam |1.7.5a| | 38 |
| Nearside Front Front position lamp|s| not working |1.1.A.3b| | 37 |
| Rear parking brake recording little or no effort | 36 |
| Offside Front Front position lamp|s| not working |1.1.A.3b| | 35 |
| Offside Rear Service brake excessively binding (1.2.1 (f)) | 35 |
| Nearside Rear Service brake excessively binding (1.2.1 (f)) | 32 |
| Parking brake lever has no reserve travel |3.1.6b| | 31 |
| Anti-lock braking system warning lamp indicates an ABS fault | 30 |
| Parking brake efficiency below requirements (1.4.2 (a) (i)) | 30 |
| Offside Rear Stop lamp not working |1.2.1b| | 30 |
| Offside Headlamp not working on dipped beam |1.7.5a| | 29 |
| Supplementary restraint system warning lamp indicates a fault (7.1.6 (a)) | 24 |
| Fuel system component leaking |7.2.3| | 24 |
| Nearside Rear Stop lamp not working |1.2.1b| | 23 |
| Nearside Front Headlamp aim beam image obviously incorrect |1.8.A.1b| | 22 |
| Hazard warning switch faulty |1.4.B.1d| | 21 |
| Exhaust system not adequately supported |7.1.1| | 21 |
| Front brake excessively fluctuating | 20 |
| Offside Front Headlamp aim beam image obviously incorrect |1.8.A.1b| | 20 |
| Nearside Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 19 |
| Offside Front Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 19 |
| Supplementary restraint system warning lamp indicates a fault |7.1.6 |a|| | 19 |
| Offside Front Position lamp not working |4.2.1 |a|| | 17 |
| Offside Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 17 |
| Offside Rear Service brake excessively binding |1.2.1 |f|| | 17 |
| Nearside Front Headlamp not working on dipped beam |1.7.5a| | 17 |
| Offside Front Headlamp not working on dipped beam |1.7.5a| | 16 |
| Hazard warning lamps inoperative |1.4.B.1b| | 15 |
| Hazard warning switch inoperative (4.4.2 (a) (ii)) | 15 |
| Windscreen wiper blade insecure | 13 |
| Rear Mechanical brake component has restricted free movement | 13 |
| Nearside Front Position lamp not working |4.2.1 |a|| | 13 |
| Windscreen washer not working | 13 |
| Engine MIL inoperative or indicates a malfunction |8.2.2.2 |g|| | 13 |
| Horn not working |1.6.2a| | 13 |
| Offside Stop lamp(s) not working (4.3.1 (a) (ii)) | 13 |
| Offside Rear Stop lamp(s) not working (4.3.1 (a) (ii)) | 12 |
| Exhaust emits excessive smoke or vapour of any colour |7.4.B.4| | 12 |
| Battery insecure |1.9.1| | 12 |
| Engine MIL inoperative or indicates a malfunction (8.2.2.2 (g)) | 11 |
| Brake hose excessively deteriorated | 11 |
| Nearside Front Headlamp aim projected beam image is obviously incorrect (4.1.2 (c)) | 11 |
| Windscreen has a sticker or other obstruction encroaching into the swept area by more than 40mm outside zone `A` |8.3.1e| | 10 |
| Offside Rear position lamp|s| not working |1.1.A.3b| | 10 |
| Offside Rear Shock absorbers has a serious fluid leak | 10 |
| Nearside Front Anti-roll bar linkage pin or bush excessively worn (5.3.4 (a) (i)) | 10 |
| Offside Front Anti-roll bar linkage pin or bush excessively worn (5.3.4 (a) (i)) | 10 |
| Nearside Rear wheel bearing rough when rotated |2.6.1| | 10 |
| Nearside Rear Outer Suspension component mounting prescribed area excessively corroded significantly reducing structural strength sill (5.3.6 (a) (i)) | 10 |
| Rear Exhaust system insecure (6.1.2 (a)) | 10 |
| Offside Rear wheel bearing rough when rotated |2.6.1| | 10 |
| All direction indicators not working (4.4.1 (a) (ii)) | 9 |
| Offside Rear Exhaust system not adequately supported |7.1.1| | 9 |
| Indicator switch faulty |1.4.A.1| | 9 |
| Front Exhaust system not adequately supported |7.1.1| | 9 |
| Nearside Front wheel bearing has excessive play |2.5.A.3c| | 9 |
| Offside Rear Suspension component mounting prescribed area excessively corroded significantly reducing structural strength (5.3.6 (a) (i)) | 9 |
| Offside Front Wheel bearing rough when rotated (5.1.3 (b) (i)) | 9 |
| Exhaust emissions exceed manufacturers specified limit (8.2.2.2 (a)) | 9 |
| Nearside Rear Service brake excessively binding |1.2.1 |f|| | 9 |
| Offside Headlamp aim projected beam image is obviously incorrect |4.1.2 |c|| | 9 |
| Nearside Rear Suspension component mounting prescribed area excessively corroded significantly reducing structural strength outer sill |5.3.6 |a| |i|| | 9 |
| Nearside Stop lamp|s| not working |4.3.1 |a| |ii|| | 9 |
| Hazard warning switch inoperative |4.4.2 |a| |ii|| | 9 |
| Windscreen has damage | 8 |
| Rear fog lamp not working |1.3.2b| | 8 |
| Emissions not tested |7.0| | 8 |
| Nearside Rear Suspension component mounting prescribed area excessively corroded significantly reducing structural strength (5.3.6 (a) (i)) | 8 |
| Exhaust emissions test not completed because smoke levels are significantly in excess of the specified limit values (8.2.2.2 (f)) | 8 |
| Parking brake lever has excessive movement indicating incorrect adjustment (1.1.6 (c)) | 8 |
| Nearside Front wheel bearing rough when rotated |2.5.A.2| | 8 |
| Front position lamp|s| not working |1.1.A.3b| | 8 |
| Exhaust emissions exceed level of metered smoke for a turbo charged engine (8.2.2.2 (b)) | 7 |
| Front Front position lamp|s| not working |1.1.A.3b| | 7 |
| Offside Headlamp aim aimed so that it dazzles other road users |1.8.A.1a| | 7 |
| Front brake application uneven | 7 |
| Nearside Headlamp not working on dipped beam |4.1.1 |a| |ii|| | 7 |
| Offside Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 7 |
| Offside Rear fog lamp not working |1.3.2b| | 7 |
| Offside Rear Suspension component mounting prescribed area excessively corroded significantly reducing structural strength outer sill |5.3.6 |a| |i|| | 7 |
| Nearside Rear Stop lamp(s) not working (4.3.1 (a) (ii)) | 7 |
| Exhaust emissions exceed level of metered smoke for a turbo charged engine |8.2.2.2 |b|| | 7 |
| Offside Front Suspension arm has excessive play in a ball joint |2.4.G.2| | 7 |
| Windscreen has a sticker or other obstruction encroaching by more than 10mm within zone `A` |8.3.1b| | 7 |
| Nearside Front Front wheel bearing has excessive play |2.5.A.3c| | 7 |
| Electronic power steering warning lamp indicates a failure in the system |2.3.8| | 7 |
| Offside Front Suspension arm rubber bush deteriorated resulting in excessive movement |2.4.G.2| | 7 |