install on the body, use original hole, no drill no welding, get information from OBD
When open the door, the step come out, it go back when the door closed.
When it deploy, the step come down, it is easy to get on the vehicle, especially for elder, lady and child.
When it retract, the step go back, hidden under the chassis, it not effect the vehicle passivity. At the same time, it will protect the parts under chassis.
