The pre trip safety check is a basic check on a vehicle to ensure that safety related components have not worn or deteriorated to the extent that the vehicle is unsafe for normal use.  

Safety related components include:  

1. Wheels and tyres.
2. Steering, suspension and braking systems.
3. Seats and seat belts
4. lamps and reflectors
5. Windscreen and windows including front windscreen wipers and washers.
6. The structure of the vehicle itself
7. Other safety related items on the body, chassis or engine.