| Most common failures | No# failures |
|---|
| Windscreen wiper does not clear the windscreen effectively | 206 |
| Headlamp aim out of alignment | 172 |
| Registration plate lamp issues | 171 |
| Registration plate issues | 77 |
| Nearside Front position lamp|s| not working |1.1.A.3b| | 75 |
| Offside Front position lamp|s| not working |1.1.A.3b| | 60 |
| Brakes imbalanced across an axle | 44 |
| Exhaust emissions Lambda reading after 2nd fast idle outside specified limits |7.3.D.3| | 35 |
| Front brake disc in such a condition that it is seriously weakened | 27 |
| Rear brake binding | 26 |
| Offside Front brake disc excessively pitted |3.5.1h| | 25 |
| Nearside Headlamp not working on dipped beam |1.7.5a| | 24 |
| Nearside Front brake disc excessively pitted |3.5.1h| | 24 |
| Exhaust emissions carbon monoxide content after 2nd fast idle excessive |7.3.D.3| | 23 |
| Nearside Front Front position lamp|s| not working |1.1.A.3b| | 21 |
| Rear brake disc in such a condition that it is seriously weakened | 20 |
| Offside Headlamp not working on dipped beam |1.7.5a| | 20 |
| Nearside Front Position lamp not working (4.2.1 (a) (ii)) | 19 |
| Parking brake: efficiency below requirements |3.7.B.7| | 18 |
| Offside Front Front position lamp|s| not working |1.1.A.3b| | 16 |
| Exhaust emissions carbon monoxide content at idle excessive |7.3.D.4| | 15 |
| Windscreen has damage | 14 |
| Engine MIL inoperative or indicates a malfunction |8.2.1.2 |h|| | 14 |
| Offside Front Position lamp not working (4.2.1 (a) (ii)) | 14 |
| Rear brake application uneven | 13 |
| Front Exhaust has a major leak of exhaust gases |7.1.2| | 13 |
| Nearside Stop lamp not working |1.2.1b| | 12 |
| Nearside Front Headlamp not working on dipped beam |1.7.5a| | 12 |
| Exhaust has a major leak of exhaust gases |7.1.2| | 12 |
| Offside Front Headlamp not working on dipped beam |1.7.5a| | 11 |
| Offside Rear Shock absorber has a serious fluid leak |2.7.3| | 10 |
| Brake pipe excessively corroded | 10 |
| Rear Exhaust has a major leak of exhaust gases |7.1.2| | 10 |
| Offside Rear Stop lamp not working |1.2.1b| | 9 |
| Windscreen wiper blade insecure | 9 |
| Rear Mechanical brake component has restricted free movement | 9 |
| Offside Stop lamp not working |1.2.1b| | 8 |
| Offside Rear brake disc excessively pitted |3.5.1h| | 8 |
| Rear fog lamp not working |1.3.2b| | 8 |
| Nearside Headlamp aim beam image obviously incorrect |1.8.A.1b| | 8 |
| Engine MIL inoperative or indicates a malfunction (8.2.1.2 (h)) | 8 |
| Nearside Front Headlamp aim beam image obviously incorrect |1.8.A.1b| | 8 |
| Rear parking brake recording little or no effort | 8 |
| Front position lamp|s| not working |1.1.A.3b| | 8 |
| Nearside Rear Stop lamp not working |1.2.1b| | 8 |
| Nearside Rear brake disc excessively pitted |3.5.1h| | 8 |
| Parking brake efficiency below requirements (1.4.2 (a) (i)) | 8 |
| Offside Headlamp aim beam image obviously incorrect |1.8.A.1b| | 8 |
| Windscreen has a sticker or other obstruction encroaching into the swept area by more than 40mm outside zone `A` |8.3.1e| | 8 |
| Emissions not tested |7.0| | 7 |
| Offside Rear position lamp|s| not working |1.1.A.3b| | 7 |
| Anti-lock braking system warning lamp indicates an ABS fault | 7 |
| Exhaust Lambda reading after 2nd fast idle outside specified limits (8.2.1.2 (c)) | 7 |
| Front brake disc excessively pitted |3.5.1h| | 7 |
| Nearside Front All position lamps not working |1.1.A.3b| | 6 |
| Offside Front Headlamp not working on dipped beam (4.1.1 (a) (ii)) | 6 |
| Centre Stop lamp not working |1.2.1b| | 6 |
| Offside Front Wheel nut|s| missing |4.2.A.1e| | 6 |
| Battery insecure |1.9.1| | 6 |
| Offside Front Headlamp aim beam image obviously incorrect |1.8.A.1b| | 6 |
| Offside Rear fog lamp not working |1.3.2b| | 5 |
| Nearside Windscreen wiper blade deteriorated |8.2.2| | 5 |
| Rear Rear fog lamp not working |1.3.2b| | 5 |
| Offside Front All position lamps not working |1.1.A.3b| | 5 |
| Parking brake lever has no reserve travel |3.1.6b| | 5 |
| Front brake application uneven | 5 |
| Exhaust has a major leak of exhaust gases (6.1.2 (a)) | 5 |
| Offside Front brake disc excessively scored |3.5.1h| | 5 |
| Nearside Rear Shock absorber has a serious fluid leak |2.7.3| | 5 |
| Exhaust emissions hydrocarbon content after 2nd fast idle excessive |7.3.D.3| | 5 |
| Brake pedal spongy |3.3.B.1b| | 5 |
| Offside Rear Anti-roll bar linkage has excessive play in a ball joint |2.4.G.2| | 4 |
| Rear brake disc excessively pitted |3.5.1h| | 4 |
| Front brake excessively fluctuating | 4 |
| Nearside Front brake disc excessively scored |3.5.1h| | 4 |
| Nearside Rear position lamp|s| not working |1.1.A.3b| | 4 |
| Offside Rear position lamp|s| excessively deteriorated so that it is not visible from a reasonable distance |1.1.A.3d| | 4 |
| Nearside Rear Rear position lamp|s| not working |1.1.A.3b| | 4 |
| Service brake: efficiency below requirements |3.7.B.7| | 4 |
| Nearside Front Windscreen wiper blade deteriorated |8.2.2| | 4 |
| Offside Front Shock absorber has a serious fluid leak |2.7.3| | 4 |
| Offside Headlamp aim aimed so that it dazzles other road users |1.8.A.1a| | 4 |