Dorman 539-864 Suspension Ball Joint - Rear Lower

Dorman 539-864 Rear Lower Ball Joint

Dorman 539-864 is a threaded suspension ball joint built as a direct replacement for the original equipment on select Ford, Mazda, and Mercury vehicles. It is precision-engineered and tested for dependable rear suspension service on applications such as the Ford Escape, Mazda Tribute, and Mercury Mariner.

Key Features

• Threaded, press-in suspension ball joint for rear lower applications
• Steel construction with a grey finish
• Dust boot included for joint protection
• Premium suspension grade type
• Tapered stud design with 12 mm wrench size
• Mounting hardware included
• Grease fitting, castle nut, cotter pin, bushings, washers, and greaseable design not included

Detailed Description

This Dorman suspension ball joint, part number 539-864, is designed for rear lower placement and uses a press-in mounting style with a threaded body. The steel housing and polychloroprene dust boot help protect the joint from road contamination while maintaining OE-style service characteristics. It is a direct-fit replacement for 2001-2012 Ford Escape rear lower, 2001-2006 and 2008-2011 Mazda Tribute rear lower, and 2005-2011 Mercury Mariner rear lower applications. Cross-reference part numbers include MOOG Chassis Products K500135 and Delphi TC5969 for the same application.

What It Helps Address

• Excessive rear suspension play or looseness
• Clunking or knocking from the rear lower suspension area
• Uneven tire wear related to worn suspension joints
• Imprecise rear suspension geometry
• Wear from damaged or missing dust boot protection

Installation Notes and Tips

Verify vehicle fitment by year, make, model, and rear lower position before installation. This part uses a press-in mounting type and a tapered stud, so proper suspension service tools and alignment procedures should be followed after replacement. Confirm the existing joint style and mounting dimensions, including the 61 mm maximum outside diameter and 111 mm length, before beginning service.

Quality Assurance

Dorman manufactures this replacement ball joint as a precision-engineered part that is rigorously tested for reliable OE-style service on the listed Ford Escape, Mazda Tribute, and Mercury Mariner applications. Part number 539-864 is built to meet the demands of suspension repair in the rear lower position.