BMW Engine Cooling Fan Assembly - Genuine BMW 17427953398

Product Information

BMW Cooling Fan diagram for M850i xDrive, M850i xDrive Gran Coupe, & more

The Engine Cooling Fan Assembly is a crucial component of a vehicle’s cooling system. It consists of an electric or mechanical fan, shroud, motor, and related wiring or clutch mechanism. Its main role is to pull or push air through the radiator to regulate coolant temperature, especially when the vehicle is idling or moving at low speeds where natural airflow is limited.

Key functions:

• Prevents engine overheating by maintaining proper coolant temperature.
• Assists air conditioning performance by cooling the condenser.
• Supports overall engine efficiency and longevity.

• Engine overheating – temperature gauge rises, especially in traffic or at idle.
• Air conditioning performance drops – AC blows warmer air when the fan isn’t running.
• Fan not turning on – visible when checking under the hood, even when the engine is hot.

About Genuine BMW

The original parts used by BMW to build your car are available as replacement parts under the “Genuine BMW” brand. When ordering a Genuine BMW part you are guaranteed to get the same part that you would pick up from your local dealerships part department. Genuine BMW parts have been built to BMW’s stringent standards and are the same quality of the original parts used to build your Ultimate Driving Machine.

You may not realize this, but the parts that make up your BMW are not necessarily manufactured by BMW. No cause for concern, as BMW designs the part, hires a manufacturer, and ensures its quality to you. In fact, many of these manufacturers have been making parts for BMW for decades. In our industry these manufacturers are called OEM (Original Equipment Manufacturers), and these are often brands you recognize, including Lemforder, ZF, Sachs, Bosch, Valeo, Zimmermann, Siemens VDO, Corteco, and more. Don’t be surprised to open that Genuine BMW parts box and find an OEM branded part inside, simply with the addition of a BMW logo.

Be sure to keep an eye out for OE tags on our product pages to quickly identify parts coming direct from OE manufacturers. That extra bit of insight could save you some serious money while shopping! Refer to our OE Academy for further information regarding the OE/OEM tags throughout the site.