Delphi TC508 Suspension Ball Joint - Front Lower Inner

Delphi TC508 Front Lower Inner Ball Joint

Delphi TC508 is a standard replacement suspension ball joint for the front lower inner position on select BMW applications. Built with a steel body, threaded stud, dust boot, and included mounting hardware, it is engineered for OE-style fit and consistent suspension articulation.

For BMW Z3, 323i, 328i, 318is, 318ti, 318i, 320i, 325i, and 325is applications, this Delphi ball joint supports precise front suspension movement and direct replacement service. The Delphi TC508 is a practical choice when replacing worn front lower inner ball joints on BMW suspension systems.

Key Features

• Front lower inner suspension ball joint
• Steel construction with gray finish
• Pressed mounting type with threaded, tapered stud
• Dust boot included for joint protection
• Standard replacement grade
• Mounting hardware and nuts included
• Greaseable design not required; sealed, non-adjustable construction
• OE-focused dimensional and material analysis for fit consistency

Detailed Description

The Delphi TC508 suspension ball joint is built for the front lower inner position and follows OE-style engineering practices used across Delphi’s steering and suspension portfolio. It 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. The design uses a steel housing, chloroprene rubber dust boot, pressed mounting, and a tapered threaded stud to support secure installation and stable suspension operation. This part cross-references Beck/Arnley 101-5114 for the same application.

What It Helps Address

• Clunking or knocking from the front suspension
• Excessive play at the lower control arm connection
• Uneven steering response caused by worn joint movement
• Suspension looseness during braking or cornering
• Boot damage that can expose the joint to contamination

Installation Notes and Tips

• Fits 1996-2002 BMW Z3, front lower inner
• Fits 1998-2000 BMW 323i, front lower inner
• Fits 1996-2000 BMW 328i, front lower inner
• Fits 1992-1999 BMW 318is, front lower inner
• Fits 1995-1999 BMW 318ti, front lower inner
• Fits 1992-1998 BMW 318i, front lower inner
• Fits 1992-1995 BMW 320i, front lower inner
• Fits 1992-1995 BMW 325i, front lower inner
• Fits 1992-1995 BMW 325is, front lower inner
• Verify the pressed-in mounting style and stud dimensions before installation
• Inspect the surrounding control arm and hardware for wear before reassembly
• Use proper suspension service procedures and alignment checks after replacement

Quality Assurance

Delphi applies OE-focused dimensional and material analysis to help maintain part-to-vehicle compatibility. The TC508 is validated through temperature cycling and salt-spray exposure testing to support durability in demanding suspension service.