Delphi TC502 Suspension Ball Joint - Front Left Lower

Delphi TC502 Front Left Lower Ball Joint

Delphi TC502 is a front left lower suspension ball joint built as a standard replacement for select Audi applications. It is listed for 1990-1995 Audi Coupe Quattro, 1992 Audi 80 and 80 Quattro from chassis serial number 8CN000001, and 1993-1995 Audi 90 and 90 Quattro.

For buyers searching for a front left lower ball joint for Audi 80, Audi 90, or Coupe Quattro, this Delphi part combines OE-focused dimensions with a bolt-on design and included dust boot and mounting hardware.

Key Features

• Part number: TC502
• Position: Front left lower
• Standard replacement suspension ball joint
• Steel construction
• Bolt-on mounting type with 3 mounting holes
• Ball joint assembly included
• Dust boot included
• Mounting hardware, bolts, nuts, and washers included
• Grease fitting not included; non-greaseable design
• Chloroprene rubber dust boot material

Detailed Description

Delphi TC502 is engineered for OE-style fit and dimensional consistency in the front suspension. Delphi applies OE-level material and dimensional analysis to its aftermarket steering and suspension portfolio, and this ball joint is built to handle demanding temperature and corrosion exposure during validation. The steel body, integrated dust boot, and bolt-on mounting layout support a direct replacement approach for the front left lower location on select Audi 80, Audi 90, and Coupe Quattro models. This part cross-references Mevotech Supreme MK90504 for the same application.

What This Ball Joint Helps Address

• Front suspension looseness at the lower control arm connection
• Clunking or knocking from the front left suspension
• Uneven steering response caused by worn joint articulation
• Excess play in the front left lower suspension pivot point
• Boot damage that can expose the joint to contamination

Installation Notes and Tips

Verify chassis serial number coverage before ordering, especially for 1992 Audi 80 and 80 Quattro applications. Confirm the front left lower position and bolt-on mounting layout match the original part. Inspect the surrounding control arm, fasteners, and mounting surfaces for wear or damage before installation. Because this is a non-greaseable ball joint, routine service is not performed through a grease fitting.

Quality Assurance

Delphi validates this suspension ball joint for OE-style performance through temperature and salt-spray testing, along with dimensional and material analysis to support proper fit and compatibility with the original application.