Dorman 539-826 Suspension Ball Joint - Front Upper

Dorman 539-826 Front Upper Ball Joint

Dorman 539-826 is a threaded suspension ball joint engineered as a standard replacement for the original equipment part on select Lexus vehicles. It is built from steel with a grey finish and includes a dust boot, greaseable design, and tapered stud for serviceable front upper suspension repair.

Key Features

• Steel construction for suspension service applications
• Threaded, bolt-in mounting type
• Greaseable design with grease fitting included
• Dust boot included with polychloroprene boot material
• Castle nut included; cotter pin hole provided
• Standard replacement suspension grade
• Wrench size: 12 mm
• Part number: 539-826

Fitment and Application

• Fits 2016-2020 Lexus IS300, Front Upper
• Fits 2011-2020 Lexus IS350, Front Upper
• Fits 2006-2015 Lexus IS250, Front Upper
• Fits 2007-2011 Lexus GS350, Front Upper
• Fits 2006 Lexus GS300, Front Upper

This Dorman suspension ball joint is a direct replacement-style component for front upper suspension service on Lexus IS250, IS350, IS300, GS350, and GS300 applications. The threaded, bolt-in design and tapered stud support secure installation in the front upper position, while the greaseable construction and included dust boot help maintain joint serviceability. Part number 539-826 is also cross-referenced to MOOG Chassis Products K500114 for the same application.

What It Helps Address

• Front-end looseness or play from a worn upper ball joint
• Clunking or knocking noises from the suspension
• Uneven steering response caused by joint wear
• Inspection failures related to excessive suspension movement
• Boot damage that can expose the joint to contamination

Installation Notes and Tips

Verify vehicle year, model, and front upper position before installation. The threaded, bolt-in design requires proper torque and alignment of the tapered stud and castle nut during assembly. Because this part is greaseable, service the joint after installation according to the vehicle maintenance schedule. Confirm clearance and hardware fitment against the original component before final tightening.

Quality Assurance

Dorman states this suspension ball joint is precision-engineered and rigorously tested to provide a reliable replacement for the original equipment on specific vehicles. Part number 539-826 is built for OE-style service on the listed Lexus applications.