Dorman 521-039 Suspension Control Arm and Ball Joint Assembly - Front Left Lower

Reliable Suspension Control Arm for Ford Expedition and Lincoln Navigator

The Dorman 521-039 Suspension Control Arm and Ball Joint Assembly is engineered to restore precise suspension performance for your Ford Expedition or Lincoln Navigator. Designed with durable steel construction and pre-greased components, this control arm assembly ensures dependable handling and ride quality.

• Pre-greased for immediate installation and reduced maintenance
• Includes rubber and steel bushings for enhanced durability
• Machined ball joint with threaded stud for secure fitment
• Steel control arm with casting/forged construction for strength
• Mounting hardware included for a complete replacement solution

Durable Design and Construction Details

This suspension control arm assembly features a robust steel control arm finished in black to resist corrosion. The assembly includes both rubber and steel bushings to absorb road vibrations and maintain suspension alignment. The ball joint is machined and installed with a threaded stud, providing a precise and secure connection to the vehicle’s suspension system. With a single mounting hole measuring 12.3 mm in diameter, the control arm is designed for straightforward installation. The control arm measures up to 288.5 mm in width and 237 mm in length, matching OEM specifications for the Ford Expedition and Lincoln Navigator.

Compatible Vehicles and Part Number

This Dorman 521-039 control arm assembly is compatible with select Ford Expedition and Lincoln Navigator models. It is designed specifically for light suspension grade applications, ensuring proper fit and function for these vehicles. When replacing suspension components on your Ford Expedition or Lincoln Navigator, using the correct part number 521-039 helps maintain vehicle safety and performance.

Common Suspension Issues Addressed

• Worn or damaged control arm bushings causing alignment problems
• Loose or failing ball joints leading to steering instability
• Corroded or weakened control arm structure affecting suspension integrity
• Excessive suspension noise or vibration during driving
• Uneven tire wear due to suspension component failure

Installation Notes and Tips

Before installation, verify vehicle compatibility with the Dorman 521-039 part number. The control arm comes pre-greased and includes mounting hardware, simplifying the replacement process. Use proper torque specifications for mounting bolts and ball joint stud to ensure secure fitment. Since this control arm is not adjustable, alignment should be checked and corrected after installation to maintain optimal suspension geometry.

Quality Assurance and Warranty

Dorman suspension components are manufactured to meet or exceed OEM standards. The 521-039 control arm assembly undergoes rigorous quality checks to ensure durability and performance. This part includes a limited warranty covering defects in materials and workmanship, providing confidence in your suspension repair.