Dorman 520-458 Suspension Control Arm and Ball Joint Assembly - Front Right Upper

Durable Suspension Control Arm and Ball Joint Assembly for Lexus

The Dorman 520-458 suspension control arm and ball joint assembly is engineered to restore precise handling and suspension performance for Lexus GS300, GS400, GS430, and SC430 models. Designed with quality materials and pre-installed components, this assembly offers a reliable replacement solution for light suspension applications.

Key Features of Dorman 520-458 Control Arm Assembly

• Pre-greased ball joint for immediate use without additional lubrication
• Includes rubber bushings and mounting hardware for a complete installation
• Constructed from durable iron with a black finish for corrosion resistance
• Press-in ball joint with threaded stud ensures secure mounting
• Compatible with Lexus GS300, GS400, GS430, and SC430 suspension systems
• Control arm dimensions: maximum width 288.5 mm, maximum length 237 mm
• Single mounting hole with 12.3 mm diameter for precise fitment
• Non-adjustable design suitable for regular grade suspension applications

Detailed Description of the Suspension Control Arm and Ball Joint

The Dorman 520-458 suspension control arm and ball joint assembly is a casting/forged iron component designed for light suspension grade use. It comes pre-greased and includes rubber bushings to absorb vibrations and reduce noise. The ball joint is press-in mounted with a 14 mm threaded stud, already installed for convenience. This assembly is finished in black to resist corrosion and includes all necessary mounting hardware, making it a comprehensive replacement part for Lexus GS and SC series vehicles. Its precise dimensions and single mounting hole ensure compatibility and ease of installation.

Common Suspension Issues Addressed by This Assembly

• Worn or damaged control arm bushings causing steering instability
• Loose or failing ball joints leading to uneven tire wear
• Suspension noise due to degraded rubber components
• Misalignment issues affecting vehicle handling
• Corrosion or structural fatigue in original control arm parts

Installation Notes and Tips

• Verify compatibility with Lexus GS300, GS400, GS430, and SC430 models before installation
• Ensure the vehicle is properly supported and suspension components are safely accessed
• Use the included mounting hardware and torque specifications as per manufacturer guidelines
• Check alignment after installation to maintain proper handling characteristics
• No grease fitting included; however, the ball joint is pre-greased for immediate use

Quality Assurance and Warranty Information

Dorman suspension components undergo rigorous quality control to meet regular grade suspension standards. The 520-458 control arm and ball joint assembly is designed for durability and reliable performance. While specific warranty details may vary, Dorman typically offers limited warranties covering defects in materials and workmanship to ensure customer confidence in replacement parts.