Dorman 540-125 Suspension Ball Joint - Front Upper

Dorman 540-125 Suspension Ball Joint

Dorman 540-125 is a bolt-on suspension ball joint engineered as a standard replacement for the original equipment on select Tesla S models. It is built from steel with a black finish and includes a dust boot for added joint protection.

Fits 2012-2020 Tesla S, front upper. Fits 2021 Tesla S, front upper, to 1/21. This Dorman 540-125 ball joint is a direct-fit suspension service part for front upper suspension repair on Tesla S applications.

Key Features

• Steel construction for suspension service durability
• Bolt-on, bolt-in mounting style with 3 mounting holes
• Standard replacement suspension grade
• Dust boot included to help protect the joint area
• Black finish
• 21 mm wrench size
• Cross-references Delphi TC8268 and Mevotech Supreme MS95502 for the same application

Detailed Description

This suspension ball joint is precision-engineered and tested to replace the original equipment part on specific Tesla S front upper applications. Dorman 540-125 uses a steel body, pinch-style stud, and bolt-on mounting design with a 10 mm mounting hole diameter and 50 mm distance between mounting holes. The assembly includes mounting hardware and a polychloroprene dust boot, while remaining a non-greaseable, non-adjustable design for standard suspension service.

For Tesla S front upper suspension repair, Dorman 540-125 provides the fitment and construction needed for restoring steering and suspension connection points. It is also referenced by MOOG Chassis Products K500436 for the same application.

What It Helps Fix

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

Installation Notes and Tips

Verify vehicle build date before ordering, since 2021 Tesla S fitment applies to vehicles built to 1/21. Confirm front upper position, mounting hole spacing, and stud type before installation. Inspect surrounding suspension components for wear and replace any damaged hardware or related parts as needed during service.

Quality Assurance

Dorman manufactures this ball joint as a tested replacement part for OE-style service on listed Tesla S applications. The part is built to meet the demands of suspension repair with a steel construction and protective dust boot.