Dorman 904-849 Vacuum Pump

Dorman 904-849 Vacuum Pump for Mercedes-Benz

Dorman 904-849 is a replacement vacuum pump built to match the fit and function of the original equipment unit. It uses a durable aluminum housing, a gear-drive design, and a barbed connector to support vacuum-operated vehicle functions on select Mercedes-Benz models.

Key Features

• Direct replacement vacuum pump for OE-style fit and operation
• Aluminum housing for durable service
• Gear-drive vacuum pump design
• Barbed inlet and connector with 0.320 in inside diameter
• Relief valve included for system protection
• Gasket/seal included for installation

Detailed Description

This Dorman vacuum pump, part number 904-849, is engineered for select Mercedes-Benz E350, R350, S350, GL350, ML350, and R320 applications. It is a mechanically driven vacuum pump replacement for vehicles that rely on engine-driven vacuum supply for braking assistance and other vacuum-operated functions. The aluminum housing and relief valve support dependable operation, while the included gasket helps restore a proper seal at the mounting surface. This part cross-references Mercedes-Benz 6422300165 for the same application.

What It Helps Fix

• Low or inconsistent vacuum supply
• Vacuum-related warning symptoms tied to pump wear
• Loss of assist for vacuum-operated vehicle systems
• Oil seepage or leakage at the pump mounting area
• Noisy or inefficient operation from a worn mechanical pump

Installation Notes and Tips

Verify the vehicle uses a mechanically driven vacuum pump before ordering. This part does not include a pulley or mounting hardware. Confirm the barbed inlet size and gasket surface condition during installation, and replace any damaged vacuum lines or seals as needed. Compatible With 2011-2013 Mercedes-Benz E350, 2010-2013 Mercedes-Benz R350, 2012-2013 Mercedes-Benz S350, 2010-2012 Mercedes-Benz GL350, 2010-2011 Mercedes-Benz ML350, and 2009 Mercedes-Benz R320.

Quality Assurance

Dorman manufactures replacement components to match original equipment fit and function. Part number 904-849 is built from durable materials and includes a gasket for a proper seal during service.