Four Seasons 89036 Engine Auxiliary Water Pump

Mercedes-Benz Auxiliary Water Pump

Four Seasons 89036 is a new electric auxiliary water pump for engine coolant circulation in select Mercedes-Benz models with rear heater equipment. Built with a plastic housing and 2-pin terminal design, it matches the OE-style layout for direct replacement service.

Compatible With Mercedes-Benz CL550, CL600, CL63 AMG, CL65 AMG, CL500, S350, S400, S500, S550, S600, S63 AMG, S65 AMG, and S450 applications with rear heater systems where listed below.

• Brand: Four Seasons Water Pump line
• Part number: 89036
• Electric auxiliary water pump for engine coolant components
• Plastic construction
• Inlet and outlet pipe diameter: 0.73 in. / 18.60 mm
• Overall height: 2.50 in.; overall width: 3.50 in.; depth: 5.75 in.
• 2 terminal pins
• Meets or exceeds OEM requirements
• New replacement part

Detailed Product Overview

Four Seasons 89036 is an auxiliary coolant pump used to maintain coolant flow in Mercedes-Benz rear heater systems. It is an electric water pump with matching inlet and outlet dimensions, making it a practical OE-style replacement for vehicles that rely on supplemental coolant circulation. This part cross-references Dayco 89036 for the same application.

Vehicle Fitment

• Fits 2007-2014 Mercedes-Benz CL550, N/A, w/ Rear Htr.; Water Pump
• Fits 2007-2014 Mercedes-Benz CL600, N/A, w/ Rear Htr.; Water Pump
• Fits 2008-2014 Mercedes-Benz CL63 AMG, N/A, w/ Rear Htr.; Water Pump
• Fits 2008-2014 Mercedes-Benz CL65 AMG, N/A, w/ Rear Htr.; Water Pump
• Fits 2007-2013 Mercedes-Benz CL500, N/A, w/ Rear Htr.; Water Pump
• Fits 2011-2013 Mercedes-Benz S350, N/A, w/ Rear Htr.; Water Pump
• Fits 2010-2013 Mercedes-Benz S400, N/A, w/ Rear Htr.; Water Pump
• Fits 2013 Mercedes-Benz S500, N/A, w/ Rear Htr.; Water Pump
• Fits 2007-2011 Mercedes-Benz S500, N/A, w/ Rear Htr.; Water Pump
• Fits 2007-2013 Mercedes-Benz S550, N/A, w/ Rear Htr.; Water Pump
• Fits 2007-2013 Mercedes-Benz S600, N/A, w/ Rear Htr.; Water Pump
• Fits 2008-2013 Mercedes-Benz S63 AMG, N/A, w/ Rear Htr.; Water Pump
• Fits 2007-2013 Mercedes-Benz S65 AMG, N/A, w/ Rear Htr.; Water Pump
• Fits 2008-2011 Mercedes-Benz S450, N/A, w/ Rear Htr.; Water Pump
• Fits 2004-2006 Mercedes-Benz CL500, N/A, Water Pump
• Fits 2005-2006 Mercedes-Benz CL55 AMG, N/A, Auxiliary Coolant Pump; Water Pump
• Fits 2004-2006 Mercedes-Benz CL600, N/A, Auxiliary Coolant Pump; Water Pump
• Fits 2005-2006 Mercedes-Benz CL65 AMG, N/A, Auxiliary Coolant Pump; Water Pump
• Fits 2004 Mercedes-Benz CL55 AMG, N/A, Water Pump

Common Replacement Uses

• Restores coolant circulation for rear heater operation
• Addresses weak or intermittent auxiliary coolant flow
• Replaces a leaking or electrically failed auxiliary pump
• Helps correct rear cabin heat complaints on listed Mercedes-Benz models
• Supports repair of coolant system warning or circulation issues tied to the auxiliary pump

Installation Notes

Verify the inlet and outlet diameter, terminal count, and vehicle application before installation. This pump is specified for rear heater-equipped Mercedes-Benz models where listed, so confirm the original pump style and connector match the replacement part number 89036. Inspect coolant hoses, electrical connectors, and surrounding components during service to avoid repeat failures.

Quality Assurance

Four Seasons lists this auxiliary water pump as a new part that meets or exceeds OEM requirements. The Four Seasons Water Pump line is built for direct-fit coolant system service, and part number 89036 follows the OE-style configuration used on the applications shown above.