Dorman 520-387 Suspension Control Arm and Ball Joint Assembly - Front Left Lower

Durable Suspension Control Arm and Ball Joint Assembly

The Dorman 520-387 suspension control arm and ball joint assembly is engineered for reliable performance in Ford Explorer, Explorer Sport Trac, and Mercury Mountaineer vehicles. Designed with pre-greased components and included bushings, this assembly ensures smooth suspension operation and long-lasting durability.

• Pre-greased for immediate use without additional lubrication
• Includes rubber bushings and mounting hardware for a complete installation
• Steel control arm with a black finish for corrosion resistance
• Press-in ball joint with threaded stud for secure mounting
• Compatible with Ford Explorer, Explorer Sport Trac, and Mercury Mountaineer models

Technical Specifications and Features

This suspension control arm and ball joint assembly features a forged and cast steel control arm measuring up to 288.5 mm in width and 237 mm in length. The assembly includes a press-in ball joint with a 14 mm threaded stud and a 12.3 mm mounting hole diameter. Rubber bushings are included to reduce vibration and noise, while the assembly comes pre-greased to minimize maintenance. Mounting hardware is also provided to facilitate installation. The control arm is designed for light suspension grade use and is not adjustable.

Compatible Vehicles and Applications

This Dorman 520-387 assembly is compatible with the following vehicles:

• Ford Explorer
• Ford Explorer Sport Trac
• Mercury Mountaineer

It is intended for use in suspension systems requiring a reliable control arm and ball joint assembly to maintain proper wheel alignment and handling characteristics.

Common Suspension Issues Addressed

• Worn or damaged control arm bushings causing excessive play
• Faulty ball joints leading to uneven tire wear or steering issues
• Corroded or weakened control arm compromising suspension integrity
• Noise or vibration from suspension components
• Misalignment affecting vehicle handling and safety

Installation Notes and Tips

Installation of the Dorman 520-387 control arm and ball joint assembly requires basic suspension knowledge and tools. Since the ball joint is press-in type and pre-installed, no separate ball joint replacement is necessary. Ensure all mounting hardware is securely tightened to manufacturer torque specifications. The assembly is pre-greased, so additional lubrication is not required during installation. 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 for fit and function. The 520-387 control arm and ball joint assembly undergoes rigorous quality control to ensure durability and performance. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in material and workmanship. Refer to Dorman's official warranty policy for complete information.