What is a control arm? - In automotive suspension, a control arm, also known as an A-arm, is a hinged suspension link between the chassis and the suspension upright or hub that carries the wheel. The inboard (chassis) end of a control arm is attached by afitment type:Direct replacement, part type:Control Arm Bushing Kit, greasable or sealed:Greasable, surface finish:Polished, surface finish:Rust Protected, oe spec or performance;custom:OE Spec, replaces oe number:6L3Z3085AL, replaces oe number:EL3Z3085B, replaces oe number:6L3Z3084AR, replaces oe number:EL3Z3084B, replaces oe number:5L3Z5K483DA, replaces oe number:2L1Z3050A, warranty:1 Year