The Control Arm, also known as an A-arm, is a crucial component in a vehicle's suspension system that helps maintain the wheels' proper alignment and provide stability while driving. This vital part connects the suspension to the chassis and allows the wheels to move up and down as the vehicle encounters bumps and other road imperfections.
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The suspension arm assembly is made up of an upper arm and a lower arm. On the chassis side, a rubber bush is installed and on the wheel side, there is a hole for the Ball Joint to connect. The arm itself is constructed from materials such as sheet metal, forged steel, aluminum alloy, or cast iron, to resist the various bouncing forces generated as a vehicle drives, brakes, and experiences lateral forces.