Dorman 521-627 Suspension Control Arm and Ball Joint Assembly - Front Left Upper

Dorman 521-627 Front Left Upper Control Arm

Dorman 521-627 is a direct replacement suspension control arm and ball joint assembly for select Toyota applications. It is built for the front left upper position and is engineered to restore smooth ride quality, directional stability, and predictable steering response on Toyota T100, 4Runner, and Pickup models.

Key Features

• Direct replacement for the original equipment control arm and ball joint assembly
• Fits the front left upper suspension position on select Toyota vehicles
• Steel boxed control arm construction with black finish
• Ball joint is included and installed from the factory
• Pre-greased design with rubber bushings already included
• Bolt-in ball joint mounting with threaded stud design
• Mounting hardware is included
• Part number: 521-627

Detailed Description

This Dorman suspension control arm and ball joint assembly is built as an OE-style replacement for specific Toyota front suspension applications. It uses a steel boxed arm, rubber bushings, and a pre-installed ball joint to match the original layout and support consistent suspension geometry. The assembly is intended to help maintain ride control and steering stability on vehicles such as the Toyota T100, Toyota 4Runner, and Toyota Pickup.

This part cross-references MOOG Chassis Products RK620681 for the same application. The Dorman 521-627 is a practical choice when replacing a worn front left upper control arm on 1986-1995 Toyota 4Runner, 1986-1995 Toyota Pickup, and 1993-1998 Toyota T100.

What It Helps Address

• Clunking or looseness from a worn upper control arm assembly
• Uneven tire wear caused by suspension wear or alignment drift
• Steering wander or reduced directional stability
• Suspension noise from deteriorated bushings or ball joint wear
• Restoring proper front suspension geometry after component fatigue

Installation Notes and Tips

Verify the front left upper position and confirm vehicle application before installation. Because the ball joint is already installed, the assembly is ready for suspension service once the original component is removed. An alignment check is recommended after replacement to confirm correct suspension angles and steering tracking.

Quality Assurance

Dorman uses an industry-focused evaluation process for this replacement assembly to support ride quality, directional stability, and predictable handling characteristics. Part number 521-627 is built for direct-fit service on confirmed Toyota applications.