Dorman 521-556 Suspension Control Arm and Ball Joint Assembly - Rear Right Upper Rearward

Durable Suspension Control Arm and Ball Joint Assembly for BMW

The Dorman 521-556 suspension control arm and ball joint assembly is engineered for reliable performance in BMW 740i, 740iL, 750iL, and Z8 models. Designed with pre-greased components and rubber bushings, this assembly ensures smooth suspension operation and improved vehicle handling.

• Pre-greased for immediate use and reduced maintenance
• Includes rubber bushings for vibration dampening
• Steel control arm with casting/forged construction for strength
• Press-in ball joint with threaded stud for secure mounting
• Mounting hardware included for straightforward installation
• Compatible with BMW 740i, 740iL, 750iL, and Z8 models

Product Features and Specifications

This suspension control arm and ball joint assembly from Dorman features a light suspension grade type suitable for regular driving conditions. The control arm is constructed from durable steel with a black finish, measuring a maximum length of 237 mm and a width of 288.5 mm. The assembly includes a press-in ball joint with a 14 mm threaded stud and a mounting hole diameter of 12.3 mm. Rubber bushings are integrated to reduce noise and absorb road shocks, enhancing ride comfort. The ball joint is installed and ready for use, eliminating the need for additional assembly.

Applications and Problem Solving

• Restores proper suspension geometry for BMW 740i, 740iL, 750iL, and Z8 vehicles
• Addresses worn or damaged control arms causing uneven tire wear
• Eliminates suspension noise related to failing bushings or ball joints
• Improves steering response and vehicle stability
• Replaces assemblies with compromised structural integrity

Installation Notes and Tips

Installation of the Dorman 521-556 control arm and ball joint assembly requires basic suspension knowledge and appropriate tools. The assembly comes pre-greased and includes mounting hardware, facilitating a smoother installation process. Ensure the vehicle is securely lifted and supported before removal of the old control arm. Torque specifications should be followed according to BMW manufacturer guidelines to maintain safety and performance.

Quality Assurance and Warranty

Dorman suspension components are manufactured to meet or exceed OEM standards, providing dependable fit and function. This control arm and ball joint assembly undergoes rigorous quality checks to ensure durability and performance. While specific warranty details are not provided, Dorman typically offers limited warranties on their suspension parts to cover defects in materials and workmanship.