Dorman 540-123 Suspension Ball Joint - Rear Upper

Dorman 540-123 Rear Upper Ball Joint

Dorman 540-123 is a threaded suspension ball joint built as a standard replacement for the original equipment design on specific vehicles. It is precision-engineered and tested for reliable service on 1999-2004 Jeep Grand Cherokee rear upper suspension applications.

Key Features

• Standard replacement suspension ball joint for OE-style service
• Threaded design with tapered stud for secure suspension connection
• Steel construction with grey finish
• Dust boot included to help protect the joint area
• Mounting hardware included
• Fits 1999-2004 Jeep Grand Cherokee, rear upper
• Part number 540-123 for catalog and fitment lookup

Detailed Description

This Dorman suspension ball joint is designed for rear upper use on the 1999-2004 Jeep Grand Cherokee. The steel body, threaded mounting style, and tapered stud support a direct replacement approach for worn OE components. Dorman 540-123 also includes a dust boot and mounting hardware, while omitting a grease fitting for a sealed, standard-service design. For buyers searching for a rear upper ball joint for Jeep Grand Cherokee 1999-2004, this part number 540-123 matches the listed application.

This part cross-references MOOG Chassis Products K7450 for the same application.

Common Problems It Can Address

• Clunking or knocking from the rear suspension
• Excessive play in the rear upper suspension joint
• Uneven tire wear related to suspension looseness
• Steering or handling instability caused by worn suspension hardware
• Noise from a deteriorated ball joint dust boot area

Installation Notes and Tips

Verify the vehicle application before installation: Fits 1999-2004 Jeep Grand Cherokee, rear upper. Confirm the threaded mounting style, stud type, and dimensions against the removed part before pressing or bolting the new joint into place. Use the correct 12 mm wrench size for service operations, and inspect the surrounding suspension components for wear that could affect alignment or joint life. Part number 540-123 should be matched to the exact rear upper position listed in the fitment data.

Quality Assurance

Dorman states this suspension ball joint is precision-engineered and rigorously tested to provide a reliable OE replacement on the specified vehicles. The part is built to standard suspension grade specifications for direct-fit service on the listed Jeep Grand Cherokee applications.