Dorman 520-443 Suspension Control Arm and Ball Joint Assembly - Front Left Upper

Durable Suspension Control Arm and Ball Joint Assembly

The Dorman 520-443 suspension control arm and ball joint assembly is engineered for reliable performance in Lexus and Toyota vehicles, including the SC300, SC400, and Supra models. Designed with precision, this assembly ensures proper suspension function and vehicle stability.

• Pre-greased for immediate installation and smooth operation
• Includes rubber bushings and mounting hardware for a complete replacement
• Constructed from durable aluminum with a black finish for corrosion resistance
• Press-in ball joint with threaded stud for secure mounting
• Compatible with Lexus SC300, SC400, and Toyota Supra suspension systems

Product Features and Specifications

This suspension control arm and ball joint assembly (part number 520-443) features a light suspension grade type suitable for regular driving conditions. The control arm is made from casting/forged aluminum, providing strength while reducing weight. It includes one mounting hole with a diameter of 12.3 mm and measures up to 288.5 mm in width and 237 mm in length. The assembly comes pre-greased and includes rubber bushings to absorb vibrations and improve ride quality. The ball joint is installed and features a press-in mounting type with a 14 mm threaded stud, ensuring a secure fit without the need for additional grease fittings.

Compatible Vehicles and Applications

This Dorman suspension control arm and ball joint assembly is compatible with the following vehicles:

• Lexus SC300
• Lexus SC400
• Toyota Supra

It is designed to restore proper suspension geometry and handling characteristics for these models, making it a suitable replacement part for worn or damaged control arms and ball joints.

Common Issues Addressed by This Assembly

• Excessive suspension noise or clunking during driving
• Uneven tire wear caused by worn control arm bushings
• Loose or unstable steering response due to ball joint wear
• Vibration or harshness from deteriorated suspension components
• Misalignment issues affecting vehicle handling and safety

Installation Notes and Tips

The Dorman 520-443 assembly comes pre-greased and includes all necessary mounting hardware, simplifying installation. Since the ball joint is press-in type and already installed, no additional ball joint assembly is required. Ensure proper torque specifications are followed during installation to maintain suspension integrity. This part is not adjustable, so alignment should be checked and corrected after installation. Professional installation is recommended for optimal results.

Quality Assurance and Warranty

Dorman suspension components are manufactured to meet or exceed OEM standards for fit, form, and function. The 520-443 control arm and ball joint assembly undergoes rigorous quality control to ensure durability and performance. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in materials and workmanship. Refer to the product documentation for exact warranty terms.