Dorman 539-838 Suspension Ball Joint - Front Right Lower

Dorman 539-838 Front Right Lower Ball Joint

Dorman 539-838 is a threaded suspension ball joint engineered as a direct replacement for the original equipment on select Lexus applications. It is built from steel with a grey finish and includes a dust boot, castle nut, cotter pin hole, and mounting hardware for a service-ready repair on the front right lower position.

Key Features

• Steel construction for suspension service durability
• Threaded, bolt-in design with tapered stud
• Dust boot included with polychloroprene boot material
• Castle nut included
• Cotter pin hole included for secure fastening
• Premium suspension grade type
• Mounting hardware included
• Wrench size: 12 mm
• Part number: 539-838

Detailed Description

This Dorman suspension ball joint is precision-engineered and tested for reliable OE-style replacement on specific vehicles. It is a front right lower ball joint for 1998-2000 Lexus GS400, 1998-2005 Lexus GS300, 2001-2005 Lexus GS430, and 2002-2010 Lexus SC430. The threaded, bolt-in mounting type and tapered stud support accurate suspension connection, while the steel body and dust boot help protect the joint in everyday driving conditions. If you are replacing a worn Lexus GS300 front right lower ball joint or servicing a Lexus SC430 front suspension, Dorman 539-838 provides the correct fitment details for those applications. This part cross-references MOOG Chassis Products (e.g., K500101) for the same application.

Common Problems This Part Can Address

• Front-end clunking or knocking from a worn ball joint
• Excessive play in the lower suspension connection
• Uneven tire wear caused by suspension looseness
• Steering wander or reduced directional stability
• Inspection failure due to damaged ball joint components

Installation Notes and Tips

Verify the front right lower position before installation and confirm the threaded, bolt-in design matches the original hardware layout. Use the 12 mm wrench size specified for service, and inspect the mounting points, stud taper, and surrounding suspension components for wear before reassembly. Because this part includes a cotter pin hole and castle nut, follow the vehicle service procedure for proper final tightening and locking.

Quality Assurance

Dorman designs this ball joint as a precision replacement for original equipment on the listed Lexus models and subjects it to rigorous testing for fit and function. Part number 539-838 is built to meet the demands of suspension repair on GS300, GS400, GS430, and SC430 applications.