LOWER CONTROL ARMS - REPLACEMENT IN PAIRS
The lower control arm connects to the frame by a control arm shaft and or bushing. The arm spans out to the spindle or knuckle support and is connected with a ball joint or a pin and bushing. In many applications a lower control arm works in unison with an upper control arm, which is called a double wishbone suspension. Control arms typically house wearable suspension parts. The inner part of the control arm will attach to the frame by a shaft and or bushings. The outer end will have a replaceable ball joint or lower outer pin and bushing.
Control arms are part of the suspension system. They attach suspension components to the chassis, and also manage the motion of the wheels to synchronize with the body of the car. They work with bushings, which are cylindrical linings that serve to reduce friction and keep the auto parts from going every which way.