Delphi TC3674 Suspension Ball Joint - Front Left Forward Lower or Front Left Lower

OE-Style Front Left Lower Ball Joint

Delphi TC3674 is a suspension ball joint built for front left lower applications on select Lexus and Toyota vehicles. It combines a steel body, threaded stud, and bolt-in mounting design with a dust boot and included cotter pin for a service-ready replacement.

Compatible with 2008-2016 Lexus LS600h, 2009-2017 Lexus LS460, 2018-2025 Lexus LS500 and LS500h, and 2021-2025 Toyota Mirai in the front left lower or front left forward lower position.

Key Features

• Steel construction with black finish
• Front left lower / front left forward lower position coverage
• Bolt-in mounting type with 4 mounting holes
• Threaded, tapered stud with 14.0 mm stud thread diameter
• Dust boot included with chloroprene rubber (CR) material
• Castle nut, cotter pin, cotter pin hole, and mounting hardware included
• Standard suspension grade type
• No grease fitting for a sealed-style service approach

Detailed Description

Delphi TC3674 is engineered as an OE-style suspension ball joint for the front left lower corner of the chassis, with fitment across Lexus LS460, LS600h, LS500, LS500h, and Toyota Mirai applications. Delphi applies dimensional and material analysis to help match OE and aftermarket requirements, while its testing program includes extreme temperature exposure and salt-spray corrosion evaluation for durability-focused replacement needs. This part cross-references MOOG Chassis Products K500375 for the same application.

Common Problems This Part Can Address

• Front suspension looseness or play at the ball joint
• Clunking or knocking from the front left lower suspension area
• Uneven tire wear related to worn steering and suspension geometry
• Steering wander or reduced front-end stability
• Visible boot damage or contamination at the joint

Installation Notes and Tips

Verify the vehicle’s front left lower or front left forward lower position before ordering. Confirm stud thread diameter, mounting style, and OE-style geometry against the removed part, especially on Lexus LS500, LS500h, LS460, LS600h, and Toyota Mirai models. Because this is a bolt-in ball joint with included cotter pin and castle nut, follow factory service procedures and torque specifications during installation.

Quality Assurance

Delphi uses OE-focused engineering and validation methods for its steering and suspension portfolio. TC3674 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 corrosion resistance.