Dorman 524-939 Suspension Control Arm and Ball Joint Assembly - Front Left Upper

Dorman 524-939 Front Left Upper Control Arm

Dorman 524-939 is a direct replacement suspension control arm and ball joint assembly for specific Land Rover applications. It is built for the front left upper position and is engineered to restore smooth ride quality, directional stability, and predictable steering response on the Range Rover, Range Rover Sport, and Discovery.

• Direct replacement for OE-style fit and function
• Fits front left upper suspension position
• Ball joint included and installed
• Pre-greased for service-ready installation
• Press-in ball joint mounting with threaded stud
• Steel control arm construction with forged/cast design
• Rubber and steel bushings included
• Mounting hardware included
• Standard replacement grade

Fitment Details

• Fits 2013-2022 Land Rover Range Rover, front left upper.
• Fits 2014-2022 Land Rover Range Rover Sport, front left upper.
• Fits 2017-2020 Land Rover Discovery, front left upper.

This part cross-references MOOG Chassis Products RK622954 for the same application. It also cross-references Delphi TC3037 for select applications. Part number 524-939 is listed for the front left upper suspension position on Land Rover Range Rover, Range Rover Sport, and Discovery models.

What It Helps Address

• Clunking or looseness from a worn upper control arm
• Uneven tire wear caused by suspension play
• Steering wander or reduced directional stability
• Vibration or harshness from degraded bushings or ball joint wear
• Suspension noise during braking, turning, or road impacts

Installation Notes

Verify vehicle fitment by year, model, and front left upper position before installation. Inspect adjacent suspension components, alignment settings, and mounting points during replacement. Because the assembly is pre-greased and includes the ball joint, it is prepared for installation once the old component is removed and the mounting surfaces are confirmed to be in good condition.

Quality Assurance

Dorman designs this control arm and ball joint assembly as a direct OE replacement for specific Land Rover applications. Its evaluation process is intended to support consistent ride quality, stable handling, and predictable suspension dynamics.