Gates 41531E Engine Auxiliary Water Pump - Heater

Gates Electric Water Pump 41531E Overview

The Gates 41531E is an electric engine auxiliary water pump built for auxiliary heater applications and OE-style cooling system performance. It uses a plastic/steel housing with a plastic impeller and standard rotation to help restore proper coolant circulation in vehicles that rely on an electric heater pump.

Gates Water Pump (Electric) components are part of the brand’s electric water pump line, created for modern vehicles where electric coolant circulation supports heating and cooling system operation. The 41531E is a direct-fit replacement for select BMW 525i, 530i, 545i, 550i, 645Ci, 650Ci, and 650i applications.

Key Features

• Part number: 41531E
• Engine auxiliary water pump for auxiliary heater systems
• Electric drive style with standard impeller rotation
• Plastic/steel housing and plastic impeller construction
• Single outlet design
• OE Performance rating for fit and function
• No back housing, pulley, or fan clutch included

Detailed Product Description

This Gates electric water pump is engineered to restore coolant flow in the heater circuit, helping the vehicle’s heating and cooling systems return to proper operation. It is a practical replacement for BMW models that use an auxiliary electric pump, including 2002-2005 BMW 525i, 2002-2003 BMW 530i, 2004-2005 BMW 545i, 2004-2005 BMW 645Ci, 2006-2007 BMW 550i, and 2006-2010 BMW 650Ci and 650i. If you are searching for a BMW auxiliary heater water pump 41531E or an OE-style electric coolant pump for these applications, this part matches the listed fitment and configuration.

This part cross-references Dorman - OE Solutions 902-076 for the same application.

Common Problems This Part Can Address

• Weak or inconsistent cabin heat from a failed auxiliary heater pump
• Loss of coolant circulation through the heater circuit
• Electric pump noise or pump failure
• Heating system performance that no longer matches OE operation
• Cooling system faults related to auxiliary coolant flow

Installation Notes and Tips

• Confirm the vehicle uses an auxiliary heater position electric water pump before ordering.
• Verify connector, outlet, and housing style against the removed part.
• Inspect coolant condition and related hoses before installing the replacement pump.
• Bleed the cooling system according to BMW service procedures after installation.
• Check for stored HVAC or cooling system fault codes after repair.

Quality Assurance

Gates manufactures this electric water pump using premium materials for durable operation under demanding driving conditions. The 41531E is built to OE-performance expectations and is intended to provide a direct replacement for the listed BMW applications.