Dorman 539-845 Suspension Ball Joint - Front Left Lower

Dorman 539-845 Front Left Lower Ball Joint

Dorman 539-845 is a threaded suspension ball joint built as a direct OE-style replacement for specific vehicles. It is engineered and tested for dependable service on the front left lower position of the 1990-1992 Lexus LS400.

Key Features

• Fits 1990-1992 Lexus LS400, front left lower
• Threaded, bolt-in suspension ball joint design
• Steel construction with a gray finish
• Dust boot included to help protect the joint area
• Castle nut, cotter pin hole, and mounting hardware included
• Tapered stud design with 12 mm wrench size
• Standard replacement suspension grade

Product Details

This Dorman suspension ball joint, part number 539-845, is designed for the front left lower suspension position on the Lexus LS400. It uses a steel body, rubber dust boot, and a threaded, bolt-in mounting style with three mounting holes. The assembly includes a tapered stud, castle nut, and mounting hardware, and it does not use a grease fitting or greaseable design. For shoppers searching for a Lexus LS400 front lower ball joint replacement, Dorman 539-845 provides a direct-fit service part for the listed applications. This part cross-references Beck/Arnley 101-4589 for the same application.

Common Problems This Part Can Address

• Excessive front suspension play or looseness
• Clunking or knocking from the lower front suspension
• Uneven tire wear related to worn ball joint movement
• Steering instability or wandering at the front end
• Inspection failure caused by worn suspension joint components

Installation Notes and Tips

Confirm the vehicle is a 1990-1992 Lexus LS400 with the front left lower application before installation. Inspect the surrounding control arm, fasteners, and mounting points for wear or damage, and verify the tapered stud seats correctly during assembly. Because this is a bolt-in, threaded suspension ball joint, proper torque and alignment checks after installation are important for correct suspension geometry.

Quality Assurance

Dorman designs this replacement ball joint to match the original equipment application and subjects it to testing for reliable fit and function. Part number 539-845 is built for the specified Lexus LS400 front left lower suspension position and is intended to restore proper joint operation in that application.