Delphi TC4172 Suspension Ball Joint - Front Lower Inner

Delphi TC4172 Front Lower Inner Ball Joint

Delphi TC4172 is a standard replacement suspension ball joint for the front lower inner position on select Mini Cooper models. It is built with OE-focused dimensional and material analysis to support proper fit and consistent steering and suspension performance.

Key Features

• Fits 2007-2015 Mini Cooper, front lower inner
• Delphi TC4172 suspension ball joint with press-in mounting type
• Pre-greased design with a rubber dust boot included
• Standard replacement grade with plastic bearing type
• Threaded stud with tapered end for secure suspension connection
• Mounting hardware included
• Counterclockwise (left) thread direction

Detailed Description

Delphi TC4172 is engineered for the front lower inner suspension location on 2007-2015 Mini Cooper applications. This ball joint uses a press-in mounting design and includes a dust boot to help protect the joint from road contamination. Delphi applies OE-style testing and dimensional analysis to support fitment consistency between the original part and the aftermarket replacement. The TC4172 is pre-greased, non-greaseable, and built as a standard replacement component for power steering applications. This part cross-references Dorman OE Solutions 521-074 for the same application.

What It Helps Address

• Front suspension looseness or play at the lower inner joint
• Clunking or knocking from the front suspension over bumps
• Uneven steering response caused by worn ball joint components
• Excess movement in the lower control arm connection
• Dust and contamination entering a worn joint area

Installation Notes and Tips

Fits 2007-2015 Mini Cooper, front lower inner. Verify press-in bore size, stud taper, and left-hand thread direction before installation. Because this is a press-in ball joint, proper suspension service tools are required for removal and installation. Confirm alignment after replacement to restore correct front-end geometry.

Quality Assurance

Delphi subjects steering and suspension parts to temperature extremes below -40 degrees C and above 120 degrees C, along with extended salt-spray exposure, to evaluate durability and corrosion resistance. Delphi TC4172 is backed by OE-focused engineering and testing practices used across its aftermarket steering portfolio.