The suspension of an automobile is a system that isolates the passenger cabin from road shocks and impacts. These systems compress and extend to allow the body of the vehicle in a relatively level position and keep the wheels on the ground over uneven terrain. Most systems use a series of spring and dampers as suspension systems. These springs can be either coil, air, torsion, or leafs in any of several positions and locations and rates. The suspension can also contain sway bars and in some vehicles may be integrated into the steering system.