Dorman 521-586 Suspension Control Arm and Ball Joint Assembly - Rear Right Upper Forward

Dorman 521-586 Rear Right Upper Control Arm

Dorman 521-586 is a direct replacement suspension control arm and ball joint assembly for select BMW X5 and BMW X6 applications. It is built to restore smooth ride quality, directional stability, and predictable suspension movement on the rear right upper forward position.

• Direct replacement for specific BMW X5 and BMW X6 rear suspension applications
• Pre-greased assembly with the ball joint installed
• Aluminum control arm construction with rubber bushings
• Press-in ball joint design with threaded stud
• Mounting hardware included
• Black finish for OE-style appearance
• Part number 521-586 for easy identification

OE-Style Suspension Replacement

This suspension control arm and ball joint assembly is engineered as an OE-style replacement for the rear right upper forward position on 2007-2018 BMW X5 and 2008-2019 BMW X6 models. The aluminum arm, rubber bushings, and pre-installed ball joint help maintain suspension geometry and consistent handling response. Dorman 521-586 is a practical choice when replacing worn rear suspension components on BMW X5 and BMW X6 vehicles.

This part cross-references MOOG Chassis Products RK621120 for the same application.

Common Problems This Part Can Address

• Rear suspension clunking or knocking from worn joints or bushings
• Uneven rear tire wear caused by loosened suspension geometry
• Loose or unstable rear-end handling during braking and cornering
• Excessive play in the rear right upper forward control arm assembly
• Restoring proper alignment after suspension wear

Installation Notes and Tips

Verify vehicle year, model, and rear right upper forward position before installation. This assembly uses a press-in ball joint with a threaded stud, so proper suspension service tools and alignment procedures are recommended after replacement. Confirm mounting hole diameter and hardware fitment during installation on BMW X5 and BMW X6 applications.

Quality Assurance

Dorman uses an industry-leading evaluation process to help ensure consistent ride quality, directional stability, and predictable suspension dynamics. The assembly is pre-greased and supplied as a complete control arm and ball joint unit for the listed applications.