Delphi TC6578 Suspension Control Arm and Ball Joint Assembly - Front Left Lower

Delphi Suspension Control Arm and Ball Joint Assembly Overview

The Delphi TC6578 suspension control arm and ball joint assembly is designed for front left lower suspension applications on Infiniti G25, G37, and Q40 models. This pre-greased, aluminum control arm combines durability with precise fitment to maintain proper suspension geometry and vehicle handling.

• Pre-greased for immediate installation
• Includes rubber bushings and mounting hardware
• Machined ball joint with threaded stud for secure mounting
• Light suspension grade type suitable for standard driving conditions
• Constructed from forged and cast aluminum for strength and reduced weight
• Compatible with Infiniti G25, G37, and Q40 front left lower suspension

Technical Details and Construction

The TC6578 control arm features a casting and forging aluminum construction that balances strength and weight savings. It comes pre-greased and includes rubber bushings to absorb vibrations and reduce noise. The ball joint is machined with a threaded stud type, ensuring a secure and precise fit. This assembly is designed with three mounting holes, measuring 13.0 mm and 14.3 mm in diameter, to match factory specifications. The control arm measures up to 350 mm in width and 322.5 mm in length, providing exact fitment for the front left lower suspension position on compatible Infiniti models.

Compatible Infiniti Models and Applications

This suspension control arm and ball joint assembly is specifically compatible with the following Infiniti vehicles:

• Infiniti G25
• Infiniti G37
• Infiniti Q40

It is designed to replace the front left lower control arm, restoring proper suspension alignment and handling characteristics.

Common Suspension Issues Addressed

• Worn or damaged control arm bushings causing steering instability
• Loose or failing ball joints leading to uneven tire wear
• Corroded or bent control arm affecting suspension geometry
• Excessive vibration or noise from front suspension
• Reduced vehicle handling and alignment problems

Installation Notes and Tips

The Delphi TC6578 comes pre-greased and includes all necessary mounting hardware for straightforward installation. Although grease fittings are not included, the assembly is maintenance-free in terms of lubrication. Ensure the vehicle is properly supported and aligned after installation. It is recommended to inspect related suspension components during replacement to maintain overall system integrity.

Quality Assurance and Warranty

Delphi suspension components meet standard replacement grade requirements, providing reliable performance for Infiniti G25, G37, and Q40 models. The TC6578 control arm and ball joint assembly undergoes rigorous quality control to ensure durability and fitment accuracy. Warranty coverage details should be confirmed with the point of purchase or Delphi directly.