Delphi TC348 Suspension Ball Joint - Front Left Lower

Delphi TC348 Front Left Lower Ball Joint

Delphi TC348 is a front left lower suspension ball joint built as a standard replacement for select Audi and Volkswagen applications. It combines a steel ball joint assembly with a dust boot and bolt-on mounting design for direct service on the front suspension.

OE-focused dimensional and material analysis helps support fitment consistency, while Delphi’s testing includes extreme temperature exposure and salt-spray durability checks. This makes the TC348 a practical choice for restoring front suspension geometry on vehicles such as the Audi 4000, Audi 80, Audi 90, Audi Coupe, Audi 4000 Quattro, Audi 80 Quattro, Audi 90 Quattro, and Volkswagen Quantum.

Key Features

• Part number TC348
• Front left lower suspension ball joint
• Steel construction with black finish
• Ball joint assembly included
• Dust boot included; chloroprene rubber (CR) boot material
• Bolt-on mounting type with mounting plate, bolts, nuts, and washers listed in the product data
• Standard replacement grade
• Non-adjustable and non-greaseable design
• Wrench size: 17.0 mm
• Interchanges with Mevotech Supreme MK9348

Detailed Description

Delphi TC348 is engineered for front left lower suspension service where a direct-fit OE-style replacement is needed. The assembly uses a steel body, a protective dust boot, and a bolt-on mounting layout with three mounting holes and a 48.0 mm distance between mounting holes. Listed dimensions include a 56.5 mm maximum outside diameter and 67.1 mm height, helping support accurate replacement selection for the intended chassis applications.

Delphi applies OE-level dimensional and material analysis to its aftermarket steering and suspension portfolio, and the TC348 is tested for temperature extremes below -40 degrees C and above 120 degrees C, plus 720 hours of salt spray exposure. For shoppers searching for a Delphi TC348 ball joint for Audi 80 front left lower service or a Delphi TC348 suspension ball joint for Volkswagen Quantum, this part is built around the confirmed fitment data below.

This part cross-references Mevotech Supreme MK9348 for the same application.

Vehicle Fitment

• Fits 1988 Audi 80, Front Left Lower, To Chassis # 89J-373-598
• Fits 1988 Audi 80 Quattro, Front Left Lower, From Chassis Serial Number 89J-373-598
• Fits 1988 Audi 90, Front Left Lower, To Chassis # 89J-373-598
• Fits 1988 Audi 90 Quattro, Front Left Lower, From Chassis Serial Number 89J-373-598
• Fits 1983-1988 Volkswagen Quantum, Front Left Lower
• Fits 1983-1987 Audi 4000, Front Left Lower, From Chassis Serial Number 81D-007-974
• Fits 1986-1987 Audi 4000 Quattro, Front Left Lower, From Chassis Serial Number 81D-007-974
• Fits 1983-1987 Audi Coupe, Front Left Lower, From Chassis Serial Number 85D-094-984

Installation Notes and Tips

Confirm chassis serial number breakpoints before ordering, especially on 1988 Audi 80, Audi 80 Quattro, Audi 90, and Audi 90 Quattro applications. Verify the front left lower mounting pattern, bolt size, and wrench access before installation. Because this is a non-greaseable design, service replacement is handled by replacing the assembly rather than adding grease through a fitting.

Inspect adjacent suspension components, alignment settings, and mounting surfaces during installation. A front suspension alignment is recommended after replacing a lower ball joint on Audi and Volkswagen chassis applications.

Quality Assurance

Delphi backs this suspension part with OE-focused engineering practices, including dimensional and material analysis for compatibility and durability testing under temperature and corrosion exposure. The TC348 is built as a standard replacement part for consistent service on the listed Audi and Volkswagen applications.