Dorman 539-843 Suspension Ball Joint - Front Lower

Dorman 539-843 Front Lower Ball Joint

Dorman 539-843 is a threaded suspension ball joint built as a standard replacement for the original equipment design on select Lexus front lower suspension applications. It is precision-engineered and tested for dependable service on Lexus IS350, IS250, GS350, RC350, RC300, RC F, GS F, and GS300 models.

Key Features

• Threaded, bolt-in suspension ball joint for front lower placement
• Steel construction with a gray finish
• Dust boot included with rubber boot material
• Standard replacement suspension grade
• Mounting hardware included
• 12 mm wrench size and tapered stud design
• Cross-references MOOG Chassis Products K500126 and Beck/Arnley 101-7995 for the same application

Detailed Description

This Dorman suspension ball joint, part number 539-843, is designed for direct replacement in front lower suspension positions on select Lexus vehicles. It uses a threaded, bolt-in mounting type with two mounting holes and a tapered stud, helping restore proper steering and suspension connection at the control arm. The steel body and rubber dust boot are specified for everyday road use, while the standard replacement design supports OE-style service on Lexus IS350, Lexus IS250, Lexus GS350, Lexus RC350, Lexus RC300, Lexus RC F, Lexus GS F, and Lexus GS300 applications.

Compatible With 2016-2024 Lexus IS300, front lower; 2011-2024 Lexus IS350, front lower; 2015-2024 Lexus RC F, front lower; 2016-2024 Lexus RC300, front lower; 2015-2024 Lexus RC350, front lower; 2016-2020 Lexus GS F, front lower; 2013-2020 Lexus GS350, front lower; 2007-2011 Lexus GS350, front lower; 2006-2015 Lexus IS250, front lower; and 2006 Lexus GS300, front lower.

What This Part Helps Address

• Front-end looseness or play from a worn lower ball joint
• Clunking or knocking noises from the front suspension
• Uneven tire wear related to suspension joint wear
• Steering response issues caused by excess joint movement
• Inspection failures tied to worn suspension components

Installation Notes and Tips

Verify the vehicle’s front lower suspension configuration before ordering, since fitment is specific to the listed Lexus models and years. Confirm the tapered stud, 12 mm wrench size, and bolt-in mounting style match the original part. Because this assembly includes a dust boot and mounting hardware, compare the replacement to the removed component before installation and torque fasteners to the vehicle manufacturer’s specifications.

Quality Assurance

Dorman manufactures this ball joint as a precision-engineered replacement and subjects it to testing for reliable service on the specified applications. Part number 539-843 is built to meet standard replacement expectations for front lower suspension repair on compatible Lexus vehicles.