Left.W/AIR SUSPENSION. Right.W/AIR SUSPENSION. w/sports suspension. A Shock absorber is a device that controls the spring oscillations when the vehicle goes over various road irregularities, so the vehicle's tires remain in contact with the road. In some cases, Shock absorbers have a secondary function as a suspension limiter to prevent the suspension from either over-extending and/or over-compressing. Air Suspension Spring. Air Suspension Spring. Cover. Damper. Strut Assembly. Suspension Absorber.