Dorman 521-851 Suspension Control Arm and Ball Joint Assembly - Front Left Upper

Durable Suspension Control Arm and Ball Joint Assembly

The Dorman 521-851 suspension control arm and ball joint assembly is engineered for reliable performance in Ford Fusion, Lincoln MKZ, Mazda Milan, and Mercury Zephyr models. Designed with pre-greased components and included bushings, this assembly ensures smooth suspension operation and long-lasting durability.

• Pre-greased for immediate use and reduced maintenance
• Includes rubber bushings and mounting hardware for a complete installation
• Steel control arm with casting/forged construction for strength
• Press-in ball joint with threaded stud for secure fitment
• Compatible with Ford Fusion, Lincoln MKZ, Mazda Milan, and Mercury Zephyr

Technical Details and Construction

This suspension control arm and ball joint assembly from Dorman features a steel control arm with a black finish, 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 pre-installed to absorb vibrations and provide a smoother ride. The assembly is designed for light suspension grade applications and comes with all necessary mounting hardware for a straightforward replacement.

Compatible Vehicles and Applications

This Dorman 521-851 control arm and ball joint assembly is compatible with select models from Ford, Lincoln, Mazda, and Mercury. Specifically, it fits the Ford Fusion, Lincoln MKZ, Mazda Milan, and Mercury Zephyr, making it a suitable replacement part for these vehicles' front suspension systems.

• Restores proper suspension geometry and alignment
• Eliminates clunking or knocking noises from worn ball joints
• Reduces uneven tire wear caused by faulty control arms
• Improves vehicle handling and steering response
• Addresses vibration and instability during driving

Installation Notes and Tips

Installation of the Dorman 521-851 control arm and ball joint assembly requires basic suspension knowledge and tools. Since the ball joint is press-in type and pre-installed, no additional ball joint assembly is needed. Ensure all mounting hardware is securely tightened to manufacturer torque specifications. Although the part is pre-greased, periodic inspection of bushings and ball joints is recommended for optimal performance.

Quality Assurance and Warranty

Dorman parts are manufactured to meet or exceed OEM standards for fit, form, and function. The 521-851 suspension control arm and ball joint assembly undergoes rigorous quality checks to ensure durability and reliability. This product includes a limited warranty covering defects in material and workmanship, providing confidence in your suspension repair.