Dorman 522-557 Suspension Control Arm and Ball Joint Assembly - Front Left Upper

Overview of Dorman Suspension Control Arm and Ball Joint Assembly

The Dorman 522-557 suspension control arm and ball joint assembly is designed for select INFINITI and Nissan vehicles, including the 370Z, EX35, EX37, G37, Q50, Q60, and QX50 models. This assembly combines a durable aluminum control arm with a pre-installed ball joint to ensure reliable suspension performance.

• Pre-greased ball joint for immediate use
• Includes rubber bushings and mounting hardware
• Aluminum control arm with casting/forged construction
• Press-in ball joint with pinch stud type
• Compatible with INFINITI and Nissan 370Z, EX35, EX37, G37, Q50, Q60, QX50

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 constructed from aluminum, providing a balance of strength and weight savings. It comes pre-greased and includes rubber bushings to reduce vibration and noise. The ball joint is press-in mounted with a pinch stud type and a 14 mm thread diameter, installed and ready for use. The assembly includes one mounting hole with a diameter of 12.3 mm and comes with all necessary mounting hardware. The control arm measures up to 288.5 mm in width and 237 mm in length, finished in black for corrosion resistance.

Compatible Vehicles and Applications

This Dorman 522-557 suspension control arm and ball joint assembly is compatible with the following vehicles:

• INFINITI 370Z, EX35, EX37, G37, Q50, Q60, QX50
• Nissan 370Z, EX35, EX37, G37, Q50, Q60, QX50

It is designed to replace worn or damaged control arms and ball joints, restoring proper suspension geometry and vehicle handling.

Common Issues Addressed by This Assembly

• Excessive suspension noise or clunking
• Uneven tire wear due to misalignment
• Loose or unstable steering feel
• Vibration or harshness while driving
• Worn or damaged control arm bushings or ball joints

Installation Notes and Tips

Installation of the Dorman 522-557 assembly requires basic suspension knowledge and tools. Since the ball joint is pre-installed and pre-greased, no additional greasing is necessary. Ensure all mounting hardware is torqued to manufacturer specifications. This control arm is not adjustable, so alignment should be checked and corrected after installation. The press-in ball joint design requires proper tools for removal and installation if servicing is needed in the future.

Quality Assurance and Warranty

Dorman suspension components are manufactured to meet or exceed OEM standards for fit and function. The 522-557 assembly undergoes quality inspections to ensure durability and performance. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in materials and workmanship. Consult product documentation for exact warranty terms.