Dorman 521-087 Suspension Control Arm and Ball Joint Assembly - Front Left Lower

Dorman 521-087 Front Left Lower Control Arm

Dorman 521-087 is a direct replacement suspension control arm and ball joint assembly for specific vehicle applications. It is built for the 2004-2007 Subaru Impreza front left lower position, with a pre-greased design, installed ball joint, and included bushings to restore steering response and ride control.

Key Features

• Direct replacement for the original equipment control arm assembly
• Fits 2004-2007 Subaru Impreza, front left lower
• Pre-greased with the ball joint already installed
• Aluminum control arm construction with rubber bushings
• Press-in ball joint mounting with threaded stud design
• Mounting hardware included
• Black finish

Detailed Description

This Dorman suspension control arm and ball joint assembly is engineered for the front left lower suspension position on the 2004-2007 Subaru Impreza. The aluminum arm, rubber bushings, and press-in ball joint configuration support stable suspension geometry and predictable handling. Dorman 521-087 is a practical OE-style replacement for drivers addressing wear in the lower control arm, bushings, or ball joint on the Subaru Impreza.

This part cross-references Mevotech Supreme CMS801142 for the same application. It also aligns with OE-style replacement needs for Subaru Impreza front left lower suspension service, including part number 521-087 for catalog and search matching.

Common Repair Symptoms

• Clunking or knocking from the front suspension
• Loose or wandering steering feel
• Uneven tire wear caused by worn suspension joints
• Vibration or instability during braking and cornering
• Excess play from worn bushings or ball joint wear

Installation Notes and Tips

Verify the vehicle is a 2004-2007 Subaru Impreza with the front left lower application before installation. Because the ball joint is installed and uses a press-in mounting type, proper suspension service tools and alignment procedures are recommended after replacement. Confirm mounting hole diameter, stud thread diameter, and arm orientation against the original part before final assembly.

Quality Assurance

Dorman uses an evaluation process for this assembly to help deliver consistent ride quality, directional stability, and predictable suspension behavior. The part number 521-087 is built as a direct replacement for specific Subaru Impreza applications and is intended to match OE-style fit and function.