Dorman 520-748 Suspension Control Arm and Ball Joint Assembly - Front Right Lower Forward

Durable Suspension Control Arm and Ball Joint Assembly for BMW

The Dorman 520-748 suspension control arm and ball joint assembly is engineered to restore precise steering and suspension performance for select BMW models. Designed specifically for BMW 525i, 528i, 530i, and Z8 vehicles, this assembly offers a reliable replacement option with pre-installed components for ease of installation.

• Pre-greased ball joint for immediate use
• Includes rubber bushings and mounting hardware
• Aluminum control arm with black finish for corrosion resistance
• Press-in ball joint with threaded stud for secure fitment
• Compatible with BMW 525i, 528i, 530i, and Z8 models

Product Features and Specifications

The Dorman 520-748 control arm assembly features a lightweight aluminum construction with a casting/forged design, providing strength and durability while reducing unsprung weight. The assembly comes pre-greased and includes rubber bushings to absorb road vibrations and improve ride quality. The ball joint is press-in mounted and threaded for secure attachment, eliminating the need for additional grease fittings. This assembly includes one mounting hole with a diameter of 12.3 mm and is finished in black to resist corrosion. Mounting hardware is included to facilitate installation.

Compatible BMW Models and Applications

This suspension control arm and ball joint assembly is compatible with the following BMW models: 525i, 528i, 530i, and Z8. It is designed to meet the suspension grade type classified as light, suitable for regular driving conditions. The part number 520-748 ensures precise fitment and performance for these specific vehicles.

Common Suspension Issues Addressed

• Worn or damaged control arm bushings causing steering instability
• Ball joint wear leading to uneven tire wear or clunking noises
• Corroded or bent control arms affecting wheel alignment
• Loose or faulty ball joint studs compromising suspension safety
• Vibration and poor handling due to degraded suspension components

Installation Notes and Tips

Installation of the Dorman 520-748 control arm and ball joint assembly requires basic suspension knowledge and tools. Since the ball joint comes pre-installed and pre-greased, no additional lubrication is necessary. Ensure the mounting hole aligns correctly with the vehicle’s frame and torque all hardware to manufacturer specifications. It is recommended to have a professional alignment performed after installation to maintain proper handling and tire wear.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards, providing reliable performance and durability. The 520-748 suspension control arm and ball joint assembly undergoes rigorous quality control to ensure fit and function. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in material and workmanship.