Dorman 986-423 Drive Shaft - Rear

Rear Drive Shaft for Mercedes-Benz S550

Dorman 986-423 is a complete rear drive shaft assembly for select 2014-2016 Mercedes-Benz S550 models. It is pre-balanced and built with new yokes, tubes, universal joints, and CV joints where applicable in the assembly design, helping simplify replacement on the rear driveline.

Key Features

• Fits 2014-2016 Mercedes-Benz S550, rear
• Complete drive shaft assembly for driveline service
• Pre-balanced for installation readiness
• Steel shaft construction
• 100% new yokes and tubes
• Universal joints included
• Compressed length: 77.125 in
• Drive shaft wall thickness: 0.083 in
• Quadprong end 1 and quadprong end 2
• Part number: 986-423

Detailed Description

This Dorman drive shaft assembly is built for rear driveline replacement on the Mercedes-Benz S550 and is engineered as a direct service part for the 2014, 2015, and 2016 model years. The steel shaft uses a 77.125-inch compressed length, 2.5-inch and 3-inch shaft diameter references, and a 0.083-inch wall thickness to match the application requirements. Dorman 986-423 is supplied as a ready-to-install assembly with new yokes, tubes, and universal joints, reducing the need to rebuild the original shaft. This part cross-references Mercedes-Benz OE number 2224106801 for the same application.

Common Problems This Part Can Address

• Driveline vibration from a worn or out-of-balance shaft
• Clunking or driveline noise from worn universal joints
• Excessive play caused by damaged yokes or tube wear
• Service issues after shaft damage from road impact or age
• Rear driveline replacement needs on Mercedes-Benz S550 models

Installation Notes and Tips

Confirm rear-position fitment before ordering and verify the vehicle matches the 2014-2016 Mercedes-Benz S550 application. Compare the original shaft length, end configuration, and mounting points to the replacement part before installation. Because this assembly is pre-balanced, avoid altering the shaft or adding modifications that can affect balance. Inspect related driveline components, including mounts and surrounding hardware, for wear before completing the repair.

Quality Assurance

Dorman manufactures replacement driveline components for service applications and this assembly is built with new structural and joint components for the listed vehicle fitment. Part number 986-423 is intended for direct replacement use on the specified Mercedes-Benz S550 rear application.