Dorman 904-839 Vacuum Pump

OE-Style Vacuum Pump Replacement

This Dorman vacuum pump, part number 904-839, matches the fit and function of the original equipment unit for select Mercedes-Benz diesel applications. Built with an aluminum housing and a belt-drive design, it supports vacuum-operated vehicle functions with reliable operation.

Compatible with 2012-2015 Mercedes-Benz ML350, 2013-2016 Mercedes-Benz GL350, 2016 Mercedes-Benz GLE350d, and 2016-2018 Mercedes-Benz GLE350, this replacement is a direct-fit option for mechanically driven vacuum pump service. The Dorman 904-839 vacuum pump also includes a gasket and a relief valve for service-ready installation.

Key Features

• OE-style replacement vacuum pump for vacuum-operated systems
• Aluminum housing for durable service
• Belt-driven vacuum pump design
• Barbed connector with 0.325 in inlet and inside diameter
• Relief valve included for system control
• Gasket included for sealing at installation
• Fits select Mercedes-Benz ML350, GL350, GLE350d, and GLE350 applications

Detailed Product Information

Dorman 904-839 is engineered to match the original pump’s fit and function, making it a practical replacement for mechanically driven vacuum pump systems. It uses an aluminum housing for strength and a barbed vacuum pump connector with a 0.325 in inlet to match the specified application. This part cross-references Mercedes-Benz 6422300765 for the same application.

For Mercedes-Benz ML350, GL350, GLE350d, and GLE350 models, this vacuum pump helps maintain the vacuum supply needed by vehicle systems that rely on engine-driven vacuum. The included gasket supports proper sealing during replacement service.

Common Problems This Part Can Address

• Loss of vacuum supply from a worn or failing pump
• Reduced operation of vacuum-controlled vehicle functions
• Vacuum leaks at the pump mounting surface
• Noisy or inconsistent pump performance
• Service issues on mechanically driven vacuum pump systems

Installation Notes and Tips

• Verify the vehicle uses a mechanically driven vacuum pump before ordering.
• Confirm connector style, inlet size, and belt-drive configuration match the original unit.
• Inspect the mounting surface and replace any damaged sealing surfaces before installation.
• Use the included gasket during installation for proper sealing.
• Follow factory service procedures for removal, torque, and system checks.

Quality Assurance

This Dorman replacement vacuum pump is built from durable materials and follows the fit-and-function approach of the original equipment part for dependable service in Mercedes-Benz vacuum pump applications.