Idler arm

The idler arm provides for swivel movement and resists up and down movement. This resistance is vital in maintaining a vehicle's toe setting. When steering linkage gets loose, a vehicle will begin to shimmy. The steering wheel will feel loose and sloppy.Too much play in the steering wheel? Know the culprit - the idler arm. The idler arm supports the end of the center link on the passenger's side of the vehicle to accurately relay the pitman arm's movement and allow proper steering.