Dorman 539-816 Suspension Ball Joint - Front Upper

Dorman 539-816 Front Upper Ball Joint

Dorman 539-816 is a threaded suspension ball joint built as a direct replacement for the original equipment on select Isuzu, Honda, and Acura applications. It is precision-engineered and tested for dependable front suspension service on vehicles such as the Isuzu Rodeo, Honda Passport, and Acura SLX.

Key Features

• Threaded, bolt-in suspension ball joint for front upper applications
• Steel construction with a grey finish
• Dust boot included to help protect the joint from contamination
• Castle nut included; cotter pin hole provided
• Premium suspension grade type
• Mounting hardware included
• Wrench size: 12 mm
• Stud type: tapered
• Cross-reference part numbers include MOOG K90685 and Delphi TC945 for the same application

Detailed Description

This Dorman suspension ball joint, part number 539-816, is made for front upper suspension service where a worn joint can affect steering feel and suspension geometry. The steel body, threaded design, and tapered stud support OE-style replacement on vehicles including the 1996-2002 Honda Passport, 1996-2004 Isuzu Rodeo, and 1996-1999 Acura SLX. It also fits other listed Isuzu front upper applications, including Rodeo Sport, Trooper, VehiCROSS, Amigo, and Axiom. The dust boot helps shield the joint, while the included castle nut and cotter pin hole support secure installation.

What It Helps Fix

• Front-end clunking or popping from a worn upper ball joint
• Excessive play in the front suspension
• Uneven tire wear related to suspension looseness
• Loose or imprecise steering response
• Inspection failures caused by ball joint wear

Installation Notes and Tips

Verify vehicle fitment by year, make, model, and front upper position before installation. This part uses a bolt-in mounting type with three mounting holes and a tapered stud. The grease fitting is not included and the joint is not greaseable, so confirm the service strategy matches the vehicle’s suspension setup. Use the correct 12 mm wrench size and follow factory torque specifications during installation.

Quality Assurance

Dorman manufactures this ball joint as a precision replacement part and subjects it to testing for reliable service on the specified applications. Part number 539-816 is built to meet the demands of front suspension repair on compatible Isuzu, Honda, and Acura vehicles.