Dorman 520-133 Suspension Control Arm and Ball Joint Assembly - Front Left Lower

Durable Suspension Control Arm and Ball Joint Assembly

The Dorman 520-133 suspension control arm and ball joint assembly is engineered for reliable performance in Chevrolet, Oldsmobile, and Pontiac vehicles. Designed specifically for models like the Alero, Classic, Cutlass, Grand Am, and Malibu, this assembly ensures proper suspension function and vehicle stability.

• Pre-greased for immediate installation and smooth operation
• Includes rubber bushings and mounting hardware for a complete replacement
• Steel control arm with a black finish for corrosion resistance
• Bolt-in ball joint with threaded stud for secure mounting
• Compatible with light suspension grade applications

Product Features and Specifications

This suspension control arm and ball joint assembly from Dorman is constructed from durable steel with a casting/forged design, providing strength and longevity. The assembly comes pre-greased, eliminating the need for additional lubrication during installation. Rubber bushings are included to absorb road vibrations and reduce noise, enhancing ride comfort. The ball joint is installed and features a threaded stud with a 12 mm thread diameter, secured by a bolt-in mounting type. 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. Mounting hardware is included to facilitate a straightforward installation process.

Compatible Vehicles and Applications

This Dorman 520-133 control arm and ball joint assembly is compatible with the following makes and models:

• Chevrolet Malibu
• Oldsmobile Alero and Classic
• Pontiac Cutlass and Grand Am

It is designed for light suspension grade use, making it suitable for regular driving conditions and maintaining proper suspension geometry.

Common Suspension Issues Addressed

• Worn or damaged control arm bushings causing steering instability
• Loose or failing ball joints leading to uneven tire wear
• Excessive suspension noise or vibration
• Misalignment resulting in poor handling
• Corroded or weakened control arm compromising safety

Installation Notes and Tips

Before installation, verify vehicle compatibility with the Dorman 520-133 part number. The assembly comes pre-greased and includes all necessary mounting hardware, simplifying the replacement process. Use proper torque specifications for the bolt-in ball joint and control arm mounting to ensure secure fitment. Since the control arm is not adjustable, alignment should be checked and corrected after installation to maintain optimal suspension performance.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards, providing dependable quality for suspension repairs. This control arm and ball joint assembly undergoes rigorous testing to ensure durability and fitment accuracy. While specific warranty details vary, Dorman typically offers a limited warranty covering defects in materials and workmanship.