Dorman 520-403 Suspension Control Arm - Front Left Lower

Durable Suspension Control Arm for Lexus RX300

The Dorman 520-403 suspension control arm is engineered to provide reliable performance for your Lexus RX300. Constructed from iron with a coated black finish, this control arm offers strength and corrosion resistance for long-lasting use.

• Material: Heavy-duty iron construction
• Coated black finish for corrosion protection
• Includes rubber bushing with black color
• Overall length of 262.5 mm for precise fitment
• Welded ball joint mounting with threaded stud type (ball joint not included)
• Press-in end type with bushing linkage end
• One rubber bushing included with 14.3 mm inside diameter and 39.6 mm outside diameter

Product Details and Specifications

This Dorman suspension control arm (part number 520-403) is designed specifically for the Lexus RX300, ensuring compatibility and proper fit. The iron material combined with casting and forging construction methods provides a robust component capable of handling suspension stresses. The black coated finish helps resist rust and wear over time. The included rubber bushing reduces vibration and noise, improving ride quality. Note that the ball joint is not included, but the arm features a welded ball joint mounting with a threaded stud type for easy installation of compatible ball joints.

Common Applications and Problem Solving

• Replaces worn or damaged suspension control arms on Lexus RX300
• Addresses issues with suspension noise caused by deteriorated bushings
• Restores proper wheel alignment and handling performance
• Eliminates excessive play or looseness in suspension linkage
• Improves overall ride stability and safety

Installation Notes and Tips

Installation of the Dorman 520-403 control arm requires removal of the old control arm and proper alignment of the new part. Since the ball joint is not included, ensure you have a compatible ball joint ready for installation. The press-in end and bushing linkage end require careful pressing tools to avoid damage. It is recommended to have a professional alignment performed after installation to maintain optimal vehicle handling.

Quality Assurance and Warranty

Dorman suspension components are manufactured to meet or exceed OEM standards for fit and function. The 520-403 control arm undergoes rigorous quality checks to ensure durability and performance. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in material and workmanship. Refer to Dorman’s official warranty policy for complete information.