Dorman 521-338 Suspension Control Arm - Rear Upper Forward

Durable Suspension Control Arm for BMW Models

The Dorman 521-338 suspension control arm is engineered to provide reliable performance and precise handling for various BMW vehicles. Designed with quality steel construction and a coated finish, this control arm ensures long-lasting durability and resistance to corrosion.

• Constructed from durable steel with casting and forging for strength
• Black coated finish for corrosion resistance
• Includes rubber bushing with black color for vibration dampening
• Overall length of 262.5 mm for exact fitment
• Welded ball joint mounting with threaded stud type (ball joint not included)
• Compatible with multiple BMW models including 120i, 328i xDrive, 335i, and X1

Detailed Product Features and Specifications

This suspension control arm by Dorman is designed specifically for BMW vehicles such as the 120i, 125i, 128i, 130i, 135i, 135is, 323i, 325i, 325xi, 328i, 328i xDrive, 328xi, 330i, 330xi, 335d, 335i, 335is, 335i xDrive, 335xi, and X1. The part number 521-338 identifies this exact control arm, ensuring compatibility and proper fitment. The arm features a robust steel construction with a casting and forging process that enhances strength and durability. It comes with a black coated finish to protect against rust and wear over time.

The control arm includes a single rubber bushing with a black color, measuring 39.6 mm in outside diameter and 14.3 mm inside diameter, designed to reduce noise and vibration. The bushing length is 92 mm, and the linkage end type is bushing with a press-in end 2 type. The ball joint mounting is welded with a threaded stud type, but the ball joint itself is not included. This control arm is not adjustable and does not include grease fittings or mounting hardware.

Applications and Common Repair Uses

• Replacement of worn or damaged suspension control arms on compatible BMW models
• Restoring proper wheel alignment and suspension geometry
• Reducing suspension noise and vibration caused by deteriorated bushings
• Improving vehicle handling and stability
• Addressing issues related to uneven tire wear or steering problems

Installation Notes and Tips

Installation of the Dorman 521-338 suspension control arm requires removal of the old control arm and proper alignment of the new part. Since the ball joint is not included, ensure the existing ball joint is inspected and replaced if necessary. Use appropriate tools to press in the bushing and secure the control arm to the vehicle. Alignment should be checked and adjusted after installation to maintain optimal handling and tire wear.

Quality Assurance and Warranty Information

Dorman suspension components are manufactured to meet or exceed OEM standards for fit, form, and function. The 521-338 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 the product documentation for exact warranty terms.