Blower Motor Regulator, Rein - E38 740i/750i/iL

OEM-type blower resistor to remedy your blower motor troubles

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Price:
$140.99

Blower fan problems in your BMW E38 7-series are likely caused by a faulty blower motor resistor, also known as a blower regulator, final stage resistor (FSR) or final stage unit (FSU). It regulates the fan speed coming from the blower motor. If your blower motor seems to have a mind of its own the blower resistor is the first part to check or replace. A failed FSU will cause the fan to not work at all, only work on one speed, or alternate the fan speed on its own. It may even cause battery drain as the blower runs even with the car turned off. Since the FSU is tricky to access, most people simply replace it rather than test it. The majority of FSU failures are caused by old age and excessive heat and a fresh FSU should remedy your problems. However, note that the FSU may be the victim from a related component failing elsewhere in the system. Inspect the plug housing and pins on the wiring harness for signs of excessive heat. When replacing your FSU, also consider changing the microfilter and inspecting the blower motor operation (a failing blower motor may be a contributor to premature FSU failure).

This is an Final Stage Unit manufactured by Rein Automotive - an original supplier to BMW for many engine and electrical parts. As an OEM it meets all of BMW's original design, fitment, and performance requirements and is TUV approved. OEM-type parts like Rein are the best alternative to more expensive Original BMW parts because they are virtually identical without the inflated price tag. This part has a two year warranty.

BMW Fitments:

7 Series
E38 (95-01) > 740i
E38 (95-01) > 740iL
E38 (95-01) > 750iL
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