from 01/2014. Left.AWD. to 01/2014. W/AIR SUSPENSION. w/F Sport pkg. 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. Shock Absorber. CYLINDER ASSEMBLY, PNMT. CYLINDER, PNEUMATIC.