Delphi TC3817 Suspension Ball Joint - Front Upper

Front Upper Suspension Ball Joint

Delphi TC3817 is a front upper suspension ball joint built as a standard replacement for select Buick, Cadillac, and Saab applications. It combines a steel body, tapered threaded stud, and included dust boot to support precise steering and suspension movement in the front end.

Compatible With 2010-2019 Buick LaCrosse, 2012-2017 Buick Regal, 2016-2020 Buick Envision, 2016-2019 Buick Cascada, 2013-2019 Cadillac XTS, 2014-2016 Cadillac ELR, 2010-2011 Saab 9-5, and 2010 Buick Allure, front upper. Delphi TC3817 is also a direct-fit OE-style replacement for drivers searching for a front upper ball joint for Buick LaCrosse or Cadillac XTS service work.

• Brand: Delphi
• Part Number: TC3817
• Front upper suspension ball joint
• Steel construction with black finish
• Standard replacement, non-adjustable design
• Ball joint assembly included
• Dust boot included; chloroprene rubber (CR)
• Bolt-on mounting type with mounting hardware, washers, and nuts included
• Tapered threaded stud for secure suspension connection
• Greaseable design not included

OE-Style Design And Fitment

Delphi applies OE-level dimensional and material analysis to its aftermarket steering and suspension parts, helping the TC3817 match the intended fit and function of the original front upper ball joint. The part is tested for temperature extremes below -40 degrees C and above 120 degrees C, and it is exposed to 720 hours of salt spray to evaluate durability in harsh conditions. This makes it a practical choice for Buick Regal, Buick LaCrosse, and Cadillac XTS front suspension service where consistent joint articulation and stable alignment are important.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

Common Problems This Part Can Address

• Front-end clunking or knocking from a worn upper ball joint
• Loose or imprecise steering feel
• Uneven tire wear caused by suspension joint play
• Suspension noise during turns or over bumps
• Visible dust boot damage or joint contamination

Installation Notes And Tips

Verify front upper fitment by year, make, and model before installation. Inspect the surrounding control arm, fasteners, and alignment settings during replacement, and confirm the tapered stud seats correctly in the knuckle or control arm connection. Because this is a bolt-on suspension component, clean the mounting surfaces and follow the vehicle service procedure for torque specifications and alignment checks after installation.

Quality Assurance

Delphi uses OE-focused engineering and validation methods for its steering and suspension portfolio, including dimensional and material analysis plus environmental testing for heat and corrosion resistance. Part number TC3817 is built to standard replacement specifications for the listed front upper applications.