Dorman 520-397 Suspension Control Arm and Ball Joint Assembly - Front Left Lower or Front Right Lower

Durable Suspension Control Arm and Ball Joint Assembly

The Dorman 520-397 suspension control arm and ball joint assembly is engineered for reliable performance in Ford and Mercury vehicles. Designed specifically for models like the Mustang, Cougar, Monarch, and Montego, 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 setup
• Steel construction with casting/forged control arm for strength and durability
• Bolt-in ball joint with threaded stud for secure mounting
• Compatible with Ford Mustang, Cougar, Monarch, and Montego models

Product Features and Specifications

This suspension control arm and ball joint assembly from Dorman features a light suspension grade type suitable for regular driving conditions. The control arm is constructed from steel with a black finish, measuring up to 288.5 mm in width and 237 mm in length. It includes one mounting hole with a diameter of 12.3 mm, and the ball joint stud has a 14 mm thread diameter. The assembly comes pre-greased and includes rubber bushings to reduce vibration and wear. Mounting hardware is included for a straightforward installation process. The ball joint is installed and ready to use, with a bolt-in mounting type for secure attachment.

Compatible Vehicles and Applications

This Dorman 520-397 control arm and ball joint assembly is compatible with select Ford and Mercury vehicles, including:

• Ford Mustang
• Ford Cougar
• Mercury Monarch
• Mercury Montego

It is designed to replace worn or damaged suspension components, restoring proper alignment and handling characteristics.

Common Suspension Issues Addressed

• Excessive play or looseness in the suspension control arm
• Worn or damaged ball joints causing steering instability
• Vibration or noise from deteriorated bushings
• Uneven tire wear due to misaligned suspension components
• Reduced vehicle handling and control

Installation Notes and Tips

Installation of the Dorman 520-397 assembly requires basic suspension knowledge and tools. Since the ball joint is pre-installed and the control arm is pre-greased, the process is simplified. Ensure the vehicle is securely lifted and supported before removal of the old control arm. Verify torque specifications for mounting bolts and ball joint stud during installation. No grease fitting is included, so no additional greasing is necessary after installation.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 520-397 suspension control arm and ball joint assembly undergoes rigorous quality checks 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.