Delphi TC6391 Suspension Control Arm and Ball Joint Assembly - Front Left Lower Rearward

Delphi Suspension Control Arm and Ball Joint Assembly Overview

The Delphi TC6391 suspension control arm and ball joint assembly is engineered for front left lower rearward applications on select Audi models. Designed with durable aluminum construction and natural rubber bushings, this component supports precise suspension movement and vehicle stability.

• Compatible with Audi A6, A6 Quattro, A7 Quattro, RS7, S6, and S7 models
• Control arm made from forged and cast aluminum for strength and reduced weight
• Includes natural rubber bushings for effective vibration dampening
• Machined ball joint mounting with threaded stud for secure fitment
• Standard replacement grade with mounting hardware included

Technical Features and Specifications

The Delphi TC6391 features a light suspension grade type suitable for maintaining factory ride quality. The control arm measures up to 415 mm (16.339 inches) in length and 210 mm (8.268 inches) in width, finished in silver for corrosion resistance. The ball joint stud has a 14 mm thread diameter and an 85 mm stud length, ensuring compatibility with the specified Audi models. This assembly is not greaseable and does not include a grease fitting, relying on durable bushings and a machined mounting design for longevity.

Applications and Problem Solving

• Restores proper suspension geometry on front left lower rearward position
• Addresses worn or damaged control arms causing uneven tire wear
• Eliminates suspension noise related to failing bushings or ball joints
• Improves vehicle handling and steering response on Audi A6, A7, RS7, S6, and S7
• Replaces corroded or bent control arms to maintain safety and ride comfort

Installation Notes and Tips

Installation of the Delphi TC6391 should be performed by a qualified technician familiar with Audi suspension systems. Ensure the vehicle is securely lifted and supported before removal of the old control arm. Verify the ball joint stud threads and mounting hole diameter (12.2 mm) match the vehicle specifications. Since this assembly is not greaseable, no additional lubrication is required during installation. Torque all fasteners to manufacturer specifications to maintain suspension integrity.

Quality Assurance and Warranty

Delphi suspension components meet standard replacement grade requirements, providing reliable performance for compatible Audi vehicles. The TC6391 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.