Keep the lower suspension connected and pivoting as designed with the Delphi control arm TC770, a suspension control arm that pairs the arm with its ball joint in one unit, backed by Delphi's OE engineering experience. It fits many vehicles, among them the 1998-2005 Volkswagen Passat, 2004-2006 Audi S4 and 1996-2006 Audi A4, and serves as a direct-fit replacement for the listed applications in the front right lower rearward position. See the "Vehicles it fits" section for the full vehicle list and engine details.
- Tested to the extreme: Delphi validates its steering parts at temperatures below -40°C and above 120°C and exposes them to 720 hours of salt spray.
- Inspected and robot-welded: Delphi control arms go through 100% crack detection and ultrasonic flaw detection to confirm the materials match OE specifications. Robot welding is used for consistent performance and quality.
- Precision ball stud: Ball studs are machined to micron tolerances, intended for durability and smooth joint operation.
- Anti-corrosion protection: Applied to each part to help prevent corrosion and give a cleaner appearance.
Delphi supplies OE safety technology fitted to millions of vehicles worldwide, and it brings that OE know-how to its aftermarket steering range. Its dimensional and material analysis is aimed at close compatibility between the original and the aftermarket part.
Clunking or knocking over bumps, loose or wandering steering, uneven tire wear, or visible play at the joint are signs a control arm and ball joint assembly may need replacing. Have the suspension inspected to confirm the cause before you order.
Frequently Asked Questions
Is this Delphi part the right 1996-2006 Audi A4 control arm?
Yes. It is listed for the 1996-2006 Audi A4 in the front right lower rearward position. The "Vehicles it fits" section lists every vehicle it fits.
Will this work as a 1998-2005 VW Passat control arm?
Yes. It is listed for the 1998-2005 Volkswagen Passat in the front right lower rearward position, and it also fits the 2004-2006 Audi S4. See the "Vehicles it fits" section for the other vehicles.
What does this control arm do?
The arm links the wheel's suspension to the vehicle's body. Its ball joint lets the steering knuckle pivot as the suspension moves and as you steer.
How does Delphi test this control arm?
Delphi control arms get 100% crack detection and ultrasonic flaw detection. Its steering parts are also tested below -40°C and above 120°C, with 720 hours of salt-spray exposure.
What are the signs of a worn control arm or ball joint?
Common signs include clunking over bumps, loose or wandering steering, uneven tire wear, and play at the joint. Have the suspension inspected to confirm the cause before replacing any parts.
