Dorman 521-566 Suspension Control Arm and Ball Joint Assembly - Front Right Upper

Durable Suspension Control Arm and Ball Joint Assembly

The Dorman 521-566 suspension control arm and ball joint assembly is designed for reliable performance on Ford Crown Victoria, Lincoln Town Car, and Mercury Grand Marquis models. This pre-greased, bolt-in assembly offers a straightforward replacement solution for light suspension needs.

• Pre-greased for immediate use
• Includes rubber bushings and mounting hardware
• Iron control arm with black finish for corrosion resistance
• Bolt-in ball joint with pinch stud design
• Compatible with Ford, Lincoln, and Mercury full-size sedans

Product Features and Specifications

This suspension control arm and ball joint assembly from Dorman is constructed from forged and cast iron, providing a sturdy base for suspension components. The assembly comes pre-greased, eliminating the need for additional lubrication during installation. Rubber bushings are included to help absorb road vibrations and reduce noise. The ball joint is installed and features a pinch stud mounting type, secured with a single mounting hole measuring 12.3 mm in diameter. The control arm measures up to 288.5 mm in width and 237 mm in length, finished in black to resist corrosion. Mounting hardware is included for a complete installation.

Compatible Vehicles and Applications

This Dorman 521-566 control arm and ball joint assembly is compatible with the following vehicles:

• Ford Crown Victoria
• Lincoln Town Car
• Mercury Grand Marquis

It is designed for light suspension grade applications, making it suitable for regular driving conditions on these full-size sedans.

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 due to bent or cracked control arms
• Difficulty maintaining proper wheel alignment

Installation Notes and Tips

Installation of the Dorman 521-566 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 mounting hole aligns correctly with the vehicle’s frame and torque all bolts to manufacturer specifications. No grease fitting is included, so no additional lubrication is necessary after installation. It is recommended to have a professional alignment performed after replacement.

Quality Assurance and Warranty

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