Nissens 831115 Engine Auxiliary Water Pump

Nissens 831115 Engine Auxiliary Water Pump

The Nissens 831115 engine auxiliary water pump is built for BMW cooling-system applications that require a 12-volt auxiliary pump with a rectangular connector. It is a direct-fit replacement for select BMW 525i, 530i, 545i, 645Ci, 550i, and 650i models, with fitment spanning 2004-2010 depending on vehicle.

• 12-volt engine auxiliary water pump for thermal management support
• Rectangular connector shape for the specified BMW application
• Housing constructed from plastic and steel
• No pulley included
• No gasket or seal included
• No mounting bracket included
• No bolts included

Fitment Details

• Fits 2006-2010 BMW 550i, N/A
• Fits 2006-2010 BMW 650i, N/A
• Fits 2004-2005 BMW 525i, N/A
• Fits 2004-2005 BMW 530i, N/A
• Fits 2004-2005 BMW 545i, N/A
• Fits 2004-2005 BMW 645Ci, N/A

This part cross-references Gates (e.g., 41531E) for the same application.

What It Helps Address

• Auxiliary coolant circulation issues
• Inconsistent cabin heat output tied to coolant flow
• Cooling-system performance problems on BMW 550i and BMW 650i applications
• Replacement needs for worn or electrically failing auxiliary pumps
• Fitment-specific service work on BMW 525i, 530i, 545i, and 645Ci models

Installation Notes

Verify the connector style, 12-volt electrical requirement, and vehicle application before installation. Because gasket or seal, mounting bracket, bolts, and pulley are not included, confirm the existing service parts on the vehicle and transfer or source any required components separately. For BMW 525i, 530i, 545i, 645Ci, 550i, and 650i cooling-system service, match the pump to the original configuration and inspect surrounding hoses and electrical connections during replacement.

Quality Assurance

Nissens develops thermal and engine-efficiency components for the aftermarket with a focus on consistent manufacturing standards. Part number 831115 is produced as a Nissens replacement component for the listed BMW applications and is backed by the brand’s Genuine Nissens Quality approach.