Dorman 522-320 Suspension Control Arm and Ball Joint Assembly - Rear Right Lower

Dorman 522-320 Rear Right Lower Control Arm

Dorman 522-320 is a direct replacement suspension control arm and ball joint assembly for select Ford Escape, Mazda Tribute, and Mercury Mariner models. It is built for the rear right lower position and uses a stamped steel arm with a pre-installed ball joint to restore stable handling and consistent suspension movement.

Key Features

• Direct replacement for the original equipment control arm and ball joint assembly
• Fits the rear right lower position on select 2009-2012 Ford Escape, 2009-2011 Mazda Tribute, and 2009-2011 Mercury Mariner applications
• Stamped steel control arm with black finish
• Ball joint is installed and pre-greased
• Rubber bushings included for suspension isolation
• Press-in ball joint design with threaded stud
• Mounting hardware included

Detailed Description

This Dorman suspension control arm and ball joint assembly, part number 522-320, is engineered as an OE-style replacement for the rear right lower suspension position. It is built with a steel stamped arm, rubber bushings, and a press-in ball joint that is already installed, helping simplify replacement on Ford Escape, Mazda Tribute, and Mercury Mariner rear suspension service. The assembly is pre-greased and supplied with mounting hardware, making it a practical choice when restoring worn rear suspension components. Dorman 522-320 is intended to help return predictable suspension response, directional stability, and a smoother ride after wear-related failure.

This part cross-references MOOG Chassis Products (e.g., RK621455) for the same application.

Common Repair Symptoms

• Rear suspension clunking or knocking over bumps
• Uneven tire wear caused by worn rear control arm components
• Loose or unstable rear-end handling
• Excessive suspension play from deteriorated bushings or ball joint wear
• Alignment issues after rear suspension component wear

Installation Notes and Tips

Verify vehicle fitment by year, make, model, and rear right lower position before installation. Inspect adjacent suspension components, fasteners, and mounting points for wear or damage before reassembly. Because the ball joint is installed and the assembly uses a press-in design, replacement should follow the correct service procedure for the vehicle application. After installation, a professional alignment check is recommended whenever rear suspension geometry has been disturbed.

Quality Assurance

Dorman evaluates this control arm and ball joint assembly through an industry-focused validation process to support proper ride quality, stability, and suspension behavior. Part number 522-320 is built as a direct replacement for specific OE applications and is backed by Dorman’s product engineering standards.