| Most common failures | No# failures |
|---|
| Registration plate issues | 8 |
| Registration plate lamp issues | 3 |
| Parking brake efficiency below requirements |3.7.C.1b| | 2 |
| Rear Direction indicators not working |1.4.A.2c| | 1 |
| Offside Front wheel bearing has excessive play |2.5.A.3c| | 1 |
| Offside Front wheel bearing rough when rotated |2.5.A.2| | 1 |
| Parking brake: efficiency below requirements |3.7.C.1b| | 1 |
| Rear Suspension arm pin or bush excessively worn linkage bearings |5.3.4 |a| |i|| | 1 |
| Nearside Front Direction indicator not working |4.4.1 |a| |ii|| | 1 |
| Stop lamp|s| not working |4.3.1 |a| |ii|| | 1 |
| Offside Front Service brake excessively binding (1.2.1 (f)) | 1 |
| Offside Front Upper Suspension arm pin or bush excessively worn (5.3.4 (a) (i)) | 1 |
| Nearside Front Lower Suspension arm ball joint excessively worn (5.3.4 (a) (i)) | 1 |
| Parking brake lever missing (1.1.6 (d)) | 1 |
| Parking brake lever missing Quadricycles may be fitted with one of the following types of parking brake:
an over-centre lever that is mounted on handlebars (1.1.6 (d)) | 1 |
| Parking brake efficiency less than 50% of the required value (1.4.2 (a) (ii)) | 1 |
| Parking brake lever missing |1.1.6 |d|| | 1 |
| Position lamp not working |4.2.1 |a|| | 1 |
| Front Direction indicators not working |1.4.A.2c| | 1 |
| Offside Rear Axle has excessive vertical movement between stub axle and axle beam rear axle bearings (5.1.2 (c) (i)) | 1 |
| Rear Drive shaft bearing excessively worn Axle (6.1.7 (b) (i)) | 1 |
| Front Front position lamp|s| not working |1.1.A.3b| | 1 |
| Stop lamp not working |1.2.1b| | 1 |
| Nearside Obligatory mirror missing |8.1.1| | 1 |
| Speedometer not fitted (7.8 (a)) | 1 |
| Nearside Front Lower Suspension arm ball joint dust cover no longer prevents the ingress of dirt (5.3.4 (b) (ii)) | 1 |
| Nearside Front Outer Steering linkage ball joint ball joint dust cover insecure so that it no longer prevents the ingress of dirt (2.1.3 (g) (ii)) | 1 |
| Parking brake lever is not capable of being maintained in operation by direct mechanical action only (1.1.6 (f)) | 1 |
| Exhaust noise is clearly in excess of that emitted by a similar vehicle fitted with a standard silencer in average condition (8.1.1 (a)) | 1 |
| Parking brake efficiency below requirements (1.4.2 (a) (i)) | 1 |
| Parking brake lever has no reserve travel |3.1.6b| | 1 |
| Centre Headlamp not working on main beam |1.7.5a| | 1 |
| Parking brake is not capable of being maintained in operation by direct mechanical action only |3.1.2| | 1 |
| Parking brake lever is impeded in its travel |3.1.6c| | 1 |
| Nearside Front Upper Suspension arm has excessive play in a pin/bush |2.4.G.2| | 1 |
| Exhaust noise is clearly in excess of that emitted by a similar vehicle fitted with a standard silencer in average condition |7.1.4| | 1 |