Connecting the spindle, hub or knuckle and wheel to the vehicle’s chassis, the control arm or wishbone - depending on the type of suspension - is a critical part of any vehicle’s steering and suspension system. Also known as an A arm, it allows the wheels to move up and down, while preventing forward and rearward movement and maintaining directional input from the driver. So, when the steering wheel is turned, the wheels follow suit. That’s pretty important, so you’ll want to fit a quality steering brand that always performs to the same standard as OE. Just like Delphi.