Four Seasons 89039 Engine Auxiliary Water Pump

Four Seasons 89039 Auxiliary Water Pump

The Four Seasons 89039 engine auxiliary water pump is a new electric coolant component built for BMW cooling system service. It uses a plastic housing, 2-pin terminal connection, and 21.75 mm inlet and outlet diameters to support OE-style replacement needs on select BMW 5 Series and 6 Series applications.

As part of the Four Seasons Water Pump line, this auxiliary pump is focused on engine coolant circulation where electric operation is required. It meets or exceeds OEM requirements and is listed as a direct replacement for several cross-reference numbers, including Dayco 89039 and Gates 41531E.

Key Features

• Brand: Four Seasons Water Pump
• Part number: 89039
• Electric auxiliary water pump for engine coolant components
• New construction with plastic material
• 21.75 mm inlet and outlet diameters
• 2-terminal pin electrical connection
• Meets or exceeds OEM requirements
• Overall dimensions: 4.50 in. wide, 3.50 in. high, 4.50 in. deep

Detailed Description

Four Seasons 89039 is an electric auxiliary water pump engineered for BMW cooling system applications that require supplemental coolant circulation. This part number 89039 is built as a new replacement unit with a plastic body, OE-style dimensions, and matching inlet and outlet sizing for straightforward service on the listed vehicles. It is a direct-fit option for BMW 550i, BMW 550i GT, BMW 550i GT xDrive, BMW 550i xDrive, BMW 650i, BMW 650i xDrive, BMW 650Ci, BMW 530i, BMW 530xi, BMW 525i, BMW 545i, and BMW 645Ci applications shown in the fitment data.

This part cross-references Dayco 89039 and Gates 41531E for the same application. If you are searching for a BMW auxiliary water pump 89039, an electric coolant pump for BMW 550i, or a replacement engine auxiliary water pump for BMW 530i and 650i models, this unit matches the listed OE-style requirements.

What This Part Helps Address

• Loss of auxiliary coolant circulation in the engine cooling system
• Cooling system warning lights tied to pump performance
• Overheating concerns related to electric coolant pump failure
• Reduced heater or coolant flow performance in supported BMW applications
• Replacement of a worn or leaking auxiliary water pump assembly

Installation Notes and Tips

Verify connector style, inlet and outlet diameter, and mounting space before installation. Confirm the vehicle application against the fitment list for your BMW 550i, 530i, 645Ci, or related model before replacing the original pump. Inspect surrounding coolant hoses, electrical terminals, and seals during service so the new pump can be installed into a clean, leak-free cooling system.

Quality Assurance

Four Seasons lists this pump as meeting or exceeding OEM requirements. The part is new, not remanufactured, and is built for direct replacement use in the specified BMW cooling system applications.

• Fits 2006-2012 BMW 550i, N/A
• Fits 2010-2012 BMW 550i GT, N/A
• Fits 2010-2012 BMW 550i GT xDrive, N/A
• Fits 2011-2012 BMW 550i xDrive, N/A
• Fits 2012 BMW 650i, N/A
• Fits 2006-2010 BMW 650i, N/A
• Fits 2012 BMW 650i xDrive, N/A
• Fits 2006-2010 BMW 650Ci, N/A
• Fits 2004-2007 BMW 530i, N/A
• Fits 2006-2007 BMW 530xi, N/A
• Fits 2004-2005 BMW 525i, N/A
• Fits 2004-2005 BMW 545i, N/A
• Fits 2004-2005 BMW 645Ci, N/A