Dorman 599-978 Engine Water Pump

Dorman 599-978 Engine Water Pump for BMW

Dorman 599-978 is an engine water pump built to match the fit and function of the original pump on specified BMW applications. It is designed for reliable cooling system performance and durable everyday operation across a wide range of BMW 335i, 535i, 740i, X3, X4, X5, X6, Z4, and related models.

Key Features

• OE-style replacement engine water pump for specified BMW cooling systems
• Electric water pump drive type
• High heat polymer housing for thermal resistance
• Plastic impeller with 7 vanes
• Includes back housing
• Mounting hardware included
• 3 mounting holes
• 1 outlet configuration
• No pulley, fan clutch, thermostat, or thermostat housing included
• Interchange reference: BMW 11517588885

Detailed Description

This Dorman engine water pump, part number 599-978, is engineered for BMW vehicles that use an electric pump design. The housing is made from high heat polymer, and the plastic impeller is configured with 7 vanes to support cooling system circulation in the original application. It is a direct-fit replacement for BMW models including the 2007-2015 BMW 335i, 2008-2016 BMW 535i, 2010-2017 BMW 740i, 2011-2017 BMW X3, 2015-2017 BMW X4, 2008-2017 BMW X6, and 2009-2016 BMW Z4. The part number 599-978 is also a useful reference when cross-checking BMW cooling system service parts.

This part cross-references BMW 11517588885 for the same application.

What It Helps Address

• Coolant circulation problems caused by a worn electric water pump
• Engine overheating from reduced coolant flow
• Cooling system leaks at the pump assembly
• Noisy or inconsistent pump operation
• Service replacement for BMW water pump failure codes or cooling performance loss

Installation Notes and Tips

Verify vehicle-specific fitment before installation, since this pump is listed for multiple BMW chassis and model years. Confirm the electric pump configuration, mounting hole count, and outlet layout match the original unit. Mounting hardware is listed as included, while the pulley, fan clutch, thermostat, and thermostat housing are not part of this assembly. Follow BMW cooling system service procedures, including proper bleeding and coolant refill steps, after installation.

Quality Assurance

Dorman designs this water pump to match original fit and function on the specified applications. The combination of a high heat polymer housing, plastic impeller, and OE-style configuration supports dependable replacement performance for BMW cooling system service.