Dorman 520-457 Suspension Control Arm and Ball Joint Assembly - Front Left Upper

Overview of Dorman Suspension Control Arm and Ball Joint Assembly

The Dorman 520-457 suspension control arm and ball joint assembly is designed specifically for Lexus GS300, GS400, GS430, and SC430 models. This pre-greased, iron control arm with integrated ball joint offers a reliable replacement option for maintaining proper suspension performance and vehicle handling.

• Pre-greased for immediate installation
• Includes rubber bushings and mounting hardware
• Press-in ball joint with threaded stud
• Constructed from durable iron with a black finish
• Compatible with Lexus GS300, GS400, GS430, and SC430

Detailed Product Features and Specifications

The Dorman 520-457 control arm assembly features a casting/forged iron construction that provides strength and durability for light suspension grade applications. It comes pre-greased, eliminating the need for additional lubrication during installation. The assembly includes rubber bushings to reduce vibration and noise, and the ball joint is installed and ready to use. The ball joint mounting type is press-in, with a threaded stud measuring 14 mm in diameter, ensuring secure attachment. The control arm measures up to 288.5 mm in width and 237 mm in length, with a single mounting hole of 12.3 mm diameter. Mounting hardware is included for a complete replacement solution.

Compatible Lexus Models and Applications

This suspension control arm and ball joint assembly is compatible with the following Lexus vehicles: GS300, GS400, GS430, and SC430. It is designed to meet the suspension requirements of these models, providing a direct fit replacement that maintains factory suspension geometry and handling characteristics. The part number 520-457 ensures you receive the correct component for these specific Lexus models.

Common Suspension Issues Addressed

• Worn or damaged control arm bushings causing excessive play
• Faulty ball joints leading to steering instability
• Suspension noise due to degraded rubber bushings
• Uneven tire wear from misaligned suspension components
• Reduced vehicle handling and ride comfort

Installation Notes and Tips

Before installation, verify compatibility with your Lexus GS300, GS400, GS430, or SC430 using the part number 520-457. The assembly comes pre-greased and includes mounting hardware, simplifying the replacement process. Use proper tools to press out the old ball joint if necessary, and torque all mounting bolts to manufacturer specifications. Since the control arm is not adjustable, ensure alignment is checked and corrected after installation.

Quality Assurance and Warranty Information

Dorman suspension components are manufactured to meet or exceed OEM standards for fit and function. The 520-457 control arm and ball joint assembly undergoes quality inspections to ensure durability and performance. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in materials and workmanship. Consult product documentation for exact warranty terms.