Dorman 539-830 Suspension Ball Joint - Front Upper

Dorman 539-830 Front Upper Ball Joint

The Dorman 539-830 suspension ball joint is a standard replacement part for the front upper position on select Lexus IS300 models. Built from steel with a tapered stud and dust boot, it is engineered and tested to replace the original equipment fitment on the specified application.

Key Features

• Direct replacement suspension ball joint for the front upper location
• Steel construction for suspension service applications
• Tapered stud design with 12 mm wrench size
• Dust boot included to help protect the joint area
• Standard replacement grade for OE-style service
• Mounting hardware included
• Part number: 539-830

Detailed Description

This Dorman suspension ball joint is built for 2001-2005 Lexus IS300 front upper service and is intended for vehicles that require a press-in, tapered-stud design. The assembly uses steel construction, a black/gray finish, and a polychloroprene dust boot for added protection at the joint interface. The Dorman 539-830 is a practical OE-style replacement for restoring proper suspension connection at the upper front position on the Lexus IS300.

This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

What It Helps Address

• Front suspension looseness or play at the upper ball joint
• Clunking or knocking from the front suspension area
• Uneven tire wear related to worn suspension joints
• Steering response issues caused by excess joint movement
• Inspection failures tied to worn front upper suspension components

Installation Notes and Tips

Compatible With 2001-2005 Lexus IS300, front upper. This is a press-in style ball joint with a tapered stud, so proper suspension service tools are recommended for removal and installation. Verify the stud type, mounting style, and front upper position before installation. The part number 539-830 should be matched to the vehicle application and suspension layout before service begins.

Quality Assurance

Dorman states that this ball joint is precision-engineered and rigorously tested to provide a reliable replacement for the original equipment on the listed vehicles. The part is built as a standard replacement suspension component for the specified Lexus IS300 application.