Delphi TC4312 Suspension Ball Joint - Front Lower

Front Lower Ball Joint for Acura Legend

Restore precise front suspension movement with this Delphi suspension ball joint, part number TC4312. It is a standard replacement front lower ball joint for 1986-1990 Acura Legend models and is built with OE-focused dimensional and material analysis for proper fit and consistent operation.

Key Features

• Fits 1986-1990 Acura Legend, front lower
• Delphi TC4312 suspension ball joint
• Press-in mounting type with included mounting hardware
• Pre-greased, non-greaseable design
• Dust boot included with rubber boot material
• Standard replacement grade for power steering applications
• Counterclockwise (left) thread direction
• Tapered stud with threaded stud type

Detailed Description

Delphi TC4312 is a front lower suspension ball joint for the Acura Legend, covering 1986, 1987, 1988, 1989, and 1990 model years. It uses a press-in mounting design and a pre-greased, sealed construction with a plastic bearing type and rubber dust boot to support smooth suspension articulation. Delphi applies OE-based engineering and extensive dimensional and material checks to help maintain correct interface and fitment for the original suspension layout. This part cross-references Dorman Premium B9441PR for the same application.

Common Repair Symptoms

• Front-end clunking or popping over bumps
• Excessive play in the lower suspension joint
• Uneven tire wear from worn steering and suspension geometry
• Loose or imprecise front suspension response
• Visible boot damage or joint contamination

Installation Notes

Fits 1986-1990 Acura Legend, front lower. Confirm press-in service requirements before installation and verify the left-hand thread direction, tapered stud dimensions, and mounting style against the original part. Because this ball joint is pre-greased and not greaseable, no routine lubrication fitting is used. Replace worn related suspension components as needed to help preserve alignment and steering feel.

Quality Assurance

Delphi subjects its OE-style steering and suspension components to temperature extremes below -40 degrees C and above 120 degrees C, along with extended salt-spray exposure testing. TC4312 is backed by Delphi’s OE-focused manufacturing standards for aftermarket suspension service.