Control arms are hinged suspension links connecting the vehicle’s wheel hub to its frame. Typically constructed from steel tubing or forged aluminum, they maintain wheel position and control movement during suspension travel. Ball joints, bushings, and mounting provisions facilitate articulation and isolate road vibration. Variations include upper and lower control arms, as well as short and long arm designs impacting geometry. Precise alignment and robust construction are critical for maintaining vehicle stability and tire contact. Replacements often require specialized tools for bushing and ball joint separation/installation.