Moog RK621119 Suspension Control Arm and Ball Joint Assembly - Rear Left Upper Forward

BMW X5/X6 Rear Left Upper Forward Control Arm

Restore rear suspension geometry with this Moog control arm and ball joint assembly, part number RK621119. It is built for the rear left upper forward position on select BMW X5 and BMW X6 models, with OE-style fitment for the specified applications.

• Fits 2007-2018 BMW X5, rear left upper forward
• Fits 2008-2019 BMW X6, rear left upper forward
• Forged aluminum control arm for structural strength
• Pre-greased for initial service readiness
• Rubber bushings included
• Press-in ball joint with threaded stud type
• Mounting hardware included
• Gray finish with corrosion protection focus

Built for Suspension Service

Moog RK621119 is a suspension control arm and ball joint assembly engineered for foreign and domestic nameplates with attention to structural strength and corrosion protection. The forged aluminum arm, rubber bushings, and pre-greased construction support rear suspension repair on BMW X5 and BMW X6 applications where the rear left upper forward arm has worn, loosened, or developed excess play. This part cross-references Dorman OE Solutions 521-585 and Mevotech Supreme CMS101311 for the same application.

Common Problems This Part Addresses

• Rear suspension clunking or knocking from worn bushings or ball joint wear
• Uneven tire wear caused by loosened rear control arm geometry
• Excess rear wheel movement or instability over bumps
• Alignment issues after suspension component wear
• Noise and vibration from a deteriorated rear left upper forward arm

Installation Notes

Confirm vehicle fitment by year, model, and rear left upper forward position before installation. The ball joint uses a press-in mounting type and the stud is threaded, so proper suspension service tools and alignment procedures are recommended after replacement. Verify all mounting points and fasteners are clean and in good condition before final torque.

Quality Assurance

Moog premium control arms are engineered for structural strength and corrosion protection, with OE-style construction details that support consistent suspension repair on BMW X5 and BMW X6 platforms. Part number RK621119 is built to meet the application requirements listed for the confirmed fitment range.