Delphi TC7389 Suspension Control Arm and Ball Joint Assembly - Rear Left Lower or Rear Left Upper

Delphi Suspension Control Arm and Ball Joint Assembly Overview

The Delphi TC7389 suspension control arm and ball joint assembly is engineered for reliable performance in select Infiniti models. Designed with durable aluminum construction and pre-greased components, this assembly supports smooth suspension operation for the rear left lower and upper positions.

• Pre-greased for immediate use
• Aluminum control arm with casting and forged construction
• Includes rubber bushings for vibration dampening
• Machined ball joint mounting with threaded stud
• Standard replacement grade for light suspension applications
• Compatible with Infiniti FX35, FX37, FX50, and QX70 rear suspension

Technical Details and Features

The TC7389 control arm assembly features a natural aluminum finish and a robust design combining casting and forging methods to ensure strength and durability. It includes three mounting holes with diameters of 12.2 mm and 12.9 mm, accommodating precise fitment requirements. The ball joint is machined and equipped with a 16.0 mm diameter threaded stud measuring 25.5 mm in length, providing secure attachment and reliable steering response. Rubber bushings are integrated to reduce noise and absorb road vibrations, enhancing ride comfort. This assembly is pre-greased but does not include grease fittings or require additional greasing, simplifying maintenance.

Compatible Infiniti Models and Applications

This suspension control arm and ball joint assembly is specifically designed for the rear left lower and upper positions on the following Infiniti vehicles:

• Infiniti FX35
• Infiniti FX37
• Infiniti FX50
• Infiniti QX70

It is intended for light suspension grade use, making it suitable for standard replacement needs without adjustable features.

Common Suspension Issues Addressed

• Worn or damaged control arms causing poor handling
• Excessive suspension noise due to deteriorated bushings
• Loose or failing ball joints affecting steering stability
• Uneven tire wear from suspension misalignment
• Reduced ride comfort from compromised suspension components

Installation Notes and Tips

When installing the Delphi TC7389 control arm assembly, ensure the vehicle is securely lifted and supported. Verify the correct rear left position (lower or upper) before installation. Since the assembly is pre-greased and does not include grease fittings, no additional lubrication is necessary. Use the included mounting hardware and torque all fasteners to manufacturer specifications. Inspect related suspension components during installation for wear or damage.

Quality Assurance and Warranty

Delphi suspension components meet standard replacement grade requirements, providing dependable performance for Infiniti FX35, FX37, FX50, and QX70 models. The TC7389 assembly is manufactured with precision materials and processes to ensure durability and fitment accuracy. Warranty coverage details should be confirmed with the point of purchase or Delphi directly.