Dorman 522-903 Suspension Control Arm and Ball Joint Assembly - Front Left Lower Rearward

Reliable Suspension Control Arm and Ball Joint Assembly

The Dorman 522-903 suspension control arm and ball joint assembly is engineered for precise fitment on select Mercedes-Benz models including the CL550, S350, S450, and S550. Designed to restore suspension performance, this assembly combines durable materials with pre-installed components for a streamlined replacement process.

• Pre-greased ball joint for immediate use
• Includes rubber bushings for vibration dampening
• Constructed from lightweight aluminum for strength and corrosion resistance
• Press-in ball joint with threaded stud for secure mounting
• Compatible with Mercedes-Benz CL550, S350, S450, and S550 models
• Mounting hardware included for installation convenience
• Control arm dimensions: maximum width 288.5 mm, maximum length 237 mm
• Black finish with casting/forged control arm type

Product Details and Specifications

The Dorman 522-903 control arm assembly features a suspension-grade light type design, optimized for regular driving conditions. The aluminum control arm offers a balance of strength and reduced weight, contributing to improved vehicle handling. Rubber bushings are included to absorb road vibrations and reduce noise, enhancing ride comfort. 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, featuring a 14 mm thread diameter for secure attachment. The assembly includes one mounting hole with a diameter of 12.3 mm, ensuring proper fitment and alignment.

Compatible Vehicles and Applications

This suspension control arm and ball joint assembly is specifically compatible with the following Mercedes-Benz models:

• Mercedes-Benz CL550
• Mercedes-Benz S350
• Mercedes-Benz S450
• Mercedes-Benz S550

It is designed to replace worn or damaged control arms and ball joints, restoring suspension geometry and vehicle stability.

Common Suspension Issues Addressed

• Excessive play or looseness in the front suspension
• Uneven tire wear caused by misaligned control arms
• Clunking or knocking noises during steering or over bumps
• Reduced steering responsiveness and vehicle handling
• Vibration or harshness transmitted through the suspension

Installation Notes and Tips

Installation of the Dorman 522-903 assembly requires basic suspension knowledge and appropriate tools. Since the ball joint is pre-installed and pre-greased, no additional lubrication is necessary. Ensure the mounting hole aligns correctly with the vehicle’s frame and torque all fasteners to manufacturer specifications. It is recommended to have a professional alignment performed after installation to maintain proper suspension geometry.

Quality Assurance and Warranty

Dorman suspension components are manufactured to meet or exceed OEM standards. The 522-903 control arm and ball joint assembly undergoes rigorous quality checks to ensure durability and fitment accuracy. While specific warranty details are not provided here, Dorman typically offers limited warranties on their suspension parts. Consult product documentation or the manufacturer for exact warranty terms.