BMW's X5 is notorious for running neagtive camber and wearing tires. Use this adjustable rear upper control arm to change camber from -1 to +3 degrees on the left hand suspension. Featuring a bonded rubber bushing and a booted adjustable ball joint, this forged aluminum arm will let you set camber to where you want it while maintaining factory ride quality and noise vibration & harshness (NVH). This arm is for the left hand side. Use SPC part #72116 on the right hand side or #72115 to do both sides.