Dorman 520-771 Suspension Control Arm - Front Left Lower Forward

Durable Suspension Control Arm for BMW X5

The Dorman 520-771 suspension control arm is engineered to provide reliable performance for your BMW X5. 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
• Compatible specifically with BMW X5 models

Technical Details and Construction

This suspension control arm features a casting and forged construction method, ensuring structural integrity under stress. The included rubber bushing has an inside diameter of 14.3 mm, an outside diameter of 39.6 mm, and a length of 92 mm, designed to absorb vibrations and reduce noise. The control arm’s black coated finish helps resist rust and wear, maintaining its durability over time. Note that the ball joint is not included, but the arm is designed with a welded ball joint mounting and a threaded stud type for secure attachment.

Compatible Vehicles and Fitment

This Dorman control arm, part number 520-771, is compatible with BMW X5 models. It is designed to meet the exact specifications required for proper suspension function and vehicle handling. Ensure compatibility by verifying your vehicle’s make and model before installation.

Common Suspension Issues Addressed

• Worn or damaged control arm bushings causing steering instability
• Corroded or weakened control arm structure affecting suspension alignment
• Excessive vibration or noise from faulty suspension components
• Loose or damaged ball joint mounting points (ball joint replacement may be required separately)
• Uneven tire wear due to suspension misalignment

Installation Notes and Tips

Installation of the Dorman 520-771 control arm requires basic suspension knowledge and proper tools. Since the ball joint is not included, inspect the existing ball joint for wear and replace if necessary. The control arm features a press-in end and bushing linkage end, so ensure proper seating of bushings during installation. Mounting hardware is not included, so retain or replace bolts and nuts as needed. Professional alignment after installation is recommended to maintain vehicle handling and tire life.

Quality Assurance and Warranty

Dorman suspension components are manufactured to meet or exceed OEM standards. The 520-771 control arm undergoes rigorous quality checks to ensure durability and fitment accuracy. While specific warranty details may vary, Dorman typically offers limited warranties covering defects in materials and workmanship. Refer to Dorman’s official documentation for exact warranty terms.