Dorman 526-103 Suspension Control Arm and Ball Joint Assembly - Front Left Upper

Dorman 526-103 Front Left Upper Control Arm

Dorman 526-103 is a direct replacement suspension control arm and ball joint assembly for specific applications, including 2001-2005 Lexus IS300 front left upper positions. Built from stamped steel with a black finish, it is pre-greased and supplied with mounting hardware for a straightforward OE-style service replacement.

Key Features

• Direct replacement for the original equipment control arm and ball joint assembly
• Fits 2001-2005 Lexus IS300, front left upper
• Stamped steel control arm construction with regular-duty grade type
• Ball joint installed and pre-greased for service-ready installation
• Press-in ball joint mounting type with threaded stud design
• Mounting hardware included; rubber bushing material specified in the assembly design
• Cross-references Delphi TC1384 and Mevotech Supreme CMS86177 for the same application

Detailed Description

This Dorman suspension control arm assembly is engineered as an OE replacement for the Lexus IS300 front left upper suspension position. The stamped steel arm, press-in ball joint design, and pre-greased construction support smooth ride quality, directional stability, and predictable suspension response. For buyers searching for a Lexus IS300 front left upper control arm or Dorman 526-103 replacement, this part provides a direct-fit service solution for the listed model years.

Compatible With 2001-2005 Lexus IS300, front left upper. The assembly uses a threaded ball joint stud, a 12 mm ball joint thread diameter, and a 17.9 mm stud length. It is non-adjustable and non-greaseable, which keeps the design simple and consistent with the original equipment layout.

Common Issues This Part Can Address

• Excessive front-end looseness or wandering
• Clunking or knocking from the upper suspension area
• Uneven tire wear caused by worn suspension geometry
• Reduced steering stability during braking or cornering
• Visible wear or damage to the original upper control arm assembly

Installation Notes and Tips

Verify vehicle fitment by year, make, model, and front left upper position before installation. Because the ball joint is installed and the assembly is pre-greased, the part is prepared for replacement service, but suspension fasteners should still be torqued to factory specifications after the vehicle is at ride height. Inspect adjacent suspension components, including bushings and related joints, for wear before completing the repair.

Quality Assurance

Dorman uses an industry-focused evaluation process to help ensure the replacement assembly delivers consistent ride control and suspension behavior. This part number, 526-103, is built to match the original equipment application for the listed Lexus IS300 fitment.