Dorman 520-735 Suspension Control Arm and Ball Joint Assembly - Front Left Upper

Durable Suspension Control Arm and Ball Joint Assembly for BMW

The Dorman 520-735 suspension control arm and ball joint assembly is engineered for reliable performance in BMW 525i, 525iT, 530i, 535i, 540i, and M5 models. Designed with quality materials and pre-greased components, this assembly ensures smooth suspension operation and improved vehicle handling.

• Pre-greased for immediate use without additional lubrication
• Includes rubber bushings for vibration dampening
• Press-in ball joint with threaded stud for secure mounting
• Constructed from durable iron with a black finish
• Mounting hardware included for straightforward installation
• Compatible with BMW 525i, 525iT, 530i, 535i, 540i, and M5 models

Technical Details and Construction

This suspension control arm and ball joint assembly (part number 520-735) features a casting/forged iron control arm designed for light suspension grade applications. The assembly comes pre-greased and includes rubber bushings to reduce noise and absorb road shocks. The ball joint is press-in mounted with a threaded stud type, measuring 14 mm in thread diameter, ensuring a secure fit. The control arm measures up to 288.5 mm in width and 237 mm in length, with a single mounting hole of 12.3 mm diameter. The black finish provides corrosion resistance and a clean appearance under the vehicle.

Compatible BMW Models and Applications

This Dorman control arm and ball joint assembly is compatible with a range of BMW vehicles, including the 525i, 525iT, 530i, 535i, 540i, and M5 models. It is designed to replace worn or damaged suspension components, restoring proper alignment and handling characteristics specific to these vehicles.

• Restores suspension stability and control
• Eliminates clunking or knocking noises from worn ball joints
• Reduces uneven tire wear caused by faulty bushings
• Improves steering response and vehicle safety
• Addresses suspension sag or misalignment issues

Installation Notes and Tips

Installation of the Dorman 520-735 assembly requires basic suspension knowledge and tools. Since the ball joint is press-in mounted and pre-installed, no additional ball joint assembly is necessary. Mounting hardware is included to facilitate a complete replacement. It is recommended to inspect related suspension components during installation and perform a wheel alignment afterward to ensure optimal performance.

Quality Assurance and Warranty

Dorman suspension components are manufactured to meet or exceed OEM specifications. The 520-735 control arm and ball joint assembly undergoes rigorous quality checks to ensure durability and fitment accuracy. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in materials and workmanship.