BMW Transistor - Genuine BMW 64111381785

Product Information

BMW Blower Motor diagram for 633CSi, 635CSi, L6

The blower motor resistor is sometimes also known as a blower motor control unit, and its purpose is to regulate the speed of the blower fan. The electricity going into the resistor is often a constant value from the main power source, and the fan speed is controlled by the output of the resistor. Due to the amount of electricity being managed by the blower motor resistor, they can get quite hot during normal operation.

HVAC fan doesn't work at all, or only works on a few settings.

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.