Dorman 902-082 Engine Auxiliary Water Pump

Engine Auxiliary Water Pump for Mercedes-Benz

Dorman 902-082 is an engine auxiliary water pump built to match the fit and function of the original pump on specified Mercedes-Benz applications. It is designed for recirculation service and reliable coolant flow in vehicles such as the Mercedes-Benz R350, SLK300, and SLK350.

Key Features

• OE-style replacement auxiliary water pump for recirculation systems
• Plastic and rubber construction with a black finish
• Clockwise rotation
• Inlet and outlet pipe diameter: 0.52 in.
• Two mounting holes for direct-fit installation on listed applications
• Gasket or seal not included
• Pulley not included
• Shaft not included

Product Details

This Dorman auxiliary water pump, part number 902-082, is engineered for specified Mercedes-Benz cooling and heater recirculation applications. It is used on models including the Mercedes-Benz R350, R320, R500, R550, R63 AMG, SLK280, SLK300, SLK350, and SLK55 AMG. The pump is built with plastic and rubber materials, measures 4.2 in. deep, and uses a clockwise rotation design with 0.1 in. mounting hole diameter. This part cross-references Dayco 89037 for the same application.

What It Helps Address

• Weak or inconsistent heater coolant circulation
• Loss of auxiliary coolant flow in recirculation circuits
• Noise or failure from a worn engine auxiliary water pump
• Poor front heater performance on listed Mercedes-Benz models
• Coolant circulation issues tied to pump wear or internal damage

Installation Notes and Tips

Verify the vehicle’s original pump orientation, inlet and outlet size, and mounting layout before installation. This part does not include a pulley or gasket/seal, so confirm the existing system components are serviceable or source the required sealing parts separately. Use the vehicle’s service information for coolant system bleeding and final leak checks after installation.

Quality Assurance

Dorman designs this auxiliary water pump to match the original fit and function on specified applications and to deliver dependable performance and durability in service.