Dorman 521-590 Suspension Control Arm and Ball Joint Assembly - Front Right Lower

Overview of Dorman Suspension Control Arm and Ball Joint Assembly

The Dorman 521-590 suspension control arm and ball joint assembly is designed specifically for BMW M3 models. This assembly combines a durable aluminum control arm with a pre-installed ball joint, engineered to maintain precise suspension geometry and improve vehicle handling.

• Pre-greased ball joint for immediate use
• Aluminum control arm with casting/forged construction
• Includes mounting hardware for straightforward installation
• Threaded ball joint stud with press-in mounting type
• Compatible with BMW M3 suspension systems

Detailed Product Features and Specifications

This suspension control arm and ball joint assembly (part number 521-590) features a lightweight aluminum control arm designed for regular grade suspension applications. The control arm measures a maximum length of 237 mm and a maximum width of 288.5 mm, finished in black for corrosion resistance. The ball joint is pre-installed and pre-greased, eliminating the need for additional lubrication during installation. It uses a press-in mounting type with a threaded stud of 14 mm diameter, ensuring secure attachment to the vehicle’s suspension system. The assembly includes one mounting hole with a diameter of 12.3 mm and comes with all necessary mounting hardware, though bushings are not included.

Compatible Vehicles and Application

This Dorman suspension control arm and ball joint assembly is compatible with BMW M3 models, providing a direct replacement for worn or damaged suspension components. It is designed to restore proper suspension alignment and improve handling performance for these vehicles.

• Restores suspension stability and alignment
• Replaces worn or damaged control arms and ball joints
• Reduces suspension noise and vibration
• Improves steering response and control
• Prevents premature tire wear caused by suspension issues

Installation Notes and Tips

Installation of the Dorman 521-590 assembly requires basic suspension knowledge and tools. Since the ball joint is pre-installed and pre-greased, no additional lubrication is necessary. Ensure the mounting hardware is securely tightened to manufacturer torque specifications. This assembly is not adjustable, so alignment should be checked and corrected after installation. The absence of bushings means the existing bushings on the vehicle should be inspected and replaced if necessary.

Quality Assurance and Warranty Information

Dorman suspension components are manufactured to meet or exceed OEM standards for fit, form, and function. The 521-590 control arm and ball joint assembly undergoes rigorous quality control to ensure durability and performance. This product includes a limited warranty covering defects in materials and workmanship under normal use conditions.