Dorman 521-302 Suspension Control Arm and Ball Joint Assembly - Front Right Upper

Overview of Dorman Suspension Control Arm and Ball Joint Assembly

The Dorman 521-302 suspension control arm and ball joint assembly is designed specifically for Mercedes-Benz S430 and S500 models. This pre-greased, iron control arm assembly includes a press-in ball joint and rubber bushings, providing a reliable replacement for your vehicle's suspension system.

• Pre-greased for immediate installation
• Includes rubber bushings and mounting hardware
• Press-in ball joint with threaded stud included and installed
• Constructed from durable iron with a black finish
• Compatible with Mercedes-Benz S430 and S500 models

Detailed Product Description

The Dorman 521-302 suspension control arm and ball joint assembly is engineered as a casting/forged iron component, ensuring strength and durability for light suspension grade applications. The assembly comes pre-greased, eliminating the need for additional lubrication during installation. It features a single mounting hole with a diameter of 12.3 mm and a maximum control arm length of 237 mm and width of 288.5 mm. The rubber bushings included help absorb road vibrations and reduce noise, while the press-in ball joint with a 14 mm threaded stud is installed and ready for use. Mounting hardware is also included to facilitate a straightforward replacement process.

Compatible Vehicles and Applications

This suspension control arm and ball joint assembly is compatible with Mercedes-Benz S430 and S500 models. It is designed to replace worn or damaged control arms and ball joints, restoring proper suspension geometry and vehicle handling.

• Eliminates suspension noise caused by worn bushings
• Restores proper wheel alignment and handling
• Replaces damaged or worn ball joints to improve steering response
• Addresses uneven tire wear due to faulty control arms
• Improves ride comfort by maintaining suspension integrity

Installation Notes and Tips

Before installation, verify the part number 521-302 to ensure compatibility with your Mercedes-Benz S430 or S500. The assembly comes pre-greased and includes mounting hardware, simplifying the installation process. Use proper tools to press out the old ball joint if necessary, and torque all mounting bolts to manufacturer specifications. Since this control arm is not adjustable, alignment should be checked and corrected after installation.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 521-302 suspension control arm and ball joint assembly undergoes rigorous quality control to ensure durability and performance. This part is backed by Dorman's limited warranty, providing coverage against defects in material and workmanship under normal use.