Dorman 521-955 Suspension Control Arm and Ball Joint Assembly - Front Left Lower

Dorman 521-955 Front Left Lower Control Arm

Dorman 521-955 is a direct replacement suspension control arm and ball joint assembly for specific Audi, Porsche, and Volkswagen applications. It is built for the front left lower position and evaluated to support smooth ride quality, directional stability, and predictable handling.

• Direct replacement for OE-style suspension service
• Fits 2007-2015 Audi Q7, front left lower
• Fits 2011-2018 Porsche Cayenne, front left lower
• Fits 2011-2018 Volkswagen Touareg, front left lower
• Aluminum control arm construction with black finish
• Ball joint included and installed
• Pre-greased for service-ready installation
• Rubber bushings included
• Mounting hardware included
• Press-in ball joint mounting with threaded stud

Detailed Product Overview

This Dorman 521-955 suspension control arm and ball joint assembly is engineered as a direct OE replacement for the front left lower suspension position on the Audi Q7, Porsche Cayenne, and Volkswagen Touareg. The aluminum casting/forged arm uses rubber bushings and a press-in ball joint design to restore suspension geometry and steering response on the listed vehicles. Dorman 521-955 is pre-greased, includes the ball joint already installed, and comes with mounting hardware for a complete replacement assembly.

This part cross-references Delphi TC2589 for the same application.

Common Repair Symptoms

• Front-end clunking or knocking over bumps
• Loose or inconsistent steering feel
• Uneven tire wear from worn suspension joints
• Excessive play in the lower control arm assembly
• Directional instability during braking or cornering

Installation Notes and Tips

Verify the front left lower position before installation and confirm vehicle application by year, make, and model. Because this assembly uses a press-in ball joint and threaded stud, proper suspension service procedures and alignment checks are recommended after replacement. Inspect adjacent bushings, fasteners, and steering components during installation to ensure the repair addresses the full source of suspension wear.

Quality Assurance

Dorman uses an industry-leading evaluation process for this control arm and ball joint assembly to help maintain OE-style ride quality, directional stability, and predictable dynamics.