Dorman 520-554 Suspension Control Arm and Ball Joint Assembly - Front Right Lower Rearward

Durable Suspension Control Arm and Ball Joint Assembly for BMW Models

The Dorman 520-554 suspension control arm and ball joint assembly is engineered to restore precise steering and suspension performance for select BMW vehicles. Designed with quality materials and pre-greased components, this assembly ensures reliable operation and long service life.

• Pre-greased ball joint for immediate use
• Includes rubber bushings and mounting hardware
• Aluminum control arm with black finish for corrosion resistance
• Press-in ball joint with threaded stud for secure fitment
• Compatible with multiple BMW models including 120i, 328i, 335i, and X1

Product Features and Specifications

This suspension control arm and ball joint assembly features a light suspension grade type suitable for regular driving conditions. The control arm is made from durable aluminum with a casting/forged construction, measuring up to 288.5 mm in width and 237 mm in length. It comes with one mounting hole of 12.3 mm diameter and includes rubber bushings to absorb vibrations and reduce noise. The ball joint is installed and pre-greased, featuring a press-in mounting type and a 14 mm threaded stud for secure attachment. Mounting hardware is included to facilitate installation.

Compatible BMW Models and Applications

This Dorman 520-554 assembly is compatible with a range of BMW vehicles, including the 120i, 125i, 128i, 130i, 135i, 135is, 323i, 325i, 328i, 330i, 335d, 335i, 335is, and X1 models. It is designed to replace worn or damaged suspension control arms and ball joints, restoring proper suspension geometry and vehicle handling.

Common Issues Addressed by This Control Arm Assembly

• Excessive suspension noise or clunking during driving
• Uneven tire wear due to misaligned suspension components
• Loose or unstable steering feel
• Vibration or shaking in the front end
• Worn ball joints causing poor handling and safety concerns

Installation Notes and Tips

Installation of the Dorman 520-554 control arm and ball joint assembly requires basic suspension knowledge and tools. Since the ball joint is pre-installed and pre-greased, no additional lubrication is necessary. Ensure all mounting hardware is tightened to manufacturer torque specifications. It is recommended to perform a wheel alignment after installation to maintain proper suspension geometry and tire wear.

Quality Assurance and Warranty

Dorman suspension components are manufactured to meet or exceed OEM standards for fit, form, and function. The 520-554 control arm and ball joint assembly undergoes rigorous quality checks to ensure durability and performance. This product comes with Dorman's limited warranty coverage, providing confidence in its reliability for your BMW suspension repair needs.