Final Stage Unit / Blower Regulator, Valeo - E82 E90 E92 E93 E70 F25 E89

Blower fan problems in your BMW E82, E90, E91, E92, E93, X3, X5, and Z4 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 either 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 a little 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, in which case a fresh final stage unit 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 cabin microfilter and inspecting the blower motor operation (a failing blower motor may be a contributor to premature FSU failure).

This is a blower motor resistor made by Valeo, an original equipment manufacturer (or "OEM") supplier to BMW for many electrical parts.

This part is listed as BMW part number 64119265892 (64-11-9-265-892) and is described as Final Stege Unit For HVAC Blower Motor.

Supersedes the following BMW part numbers:
64119266185 (64-11-9-266-185)
64119222072 (64-11-9-222-072)
64119146765 (64-11-9-146-765)
64116927090 (64-11-6-927-090)

BMW Fitments:

1 Series
E82 / E88 (08-13) > 128i
E82 / E88 (08-13) > 135i
E82 / E88 (08-13) > 135is
E82 / E88 (08-13) > 1M (11-12)
3 Series
E90 / E91 / E92 / E93 (06-13) > 323i
E90 / E91 / E92 / E93 (06-13) > 325i
E90 / E91 / E92 / E93 (06-13) > 325xi
E90 / E91 / E92 / E93 (06-13) > 328i
E90 / E91 / E92 / E93 (06-13) > 328xi
E90 / E91 / E92 / E93 (06-13) > 330i
E90 / E91 / E92 / E93 (06-13) > 330xi
E90 / E91 / E92 / E93 (06-13) > 335d
E90 / E91 / E92 / E93 (06-13) > 335i
E90 / E91 / E92 / E93 (06-13) > 335is
E90 / E91 / E92 / E93 (06-13) > 335xi
E90 / E91 / E92 / E93 (06-13) > M3
X1 Series
E84 X1 (2013-2015) > X1 28i
E84 X1 (2013-2015) > X1 28i xDrive
E84 X1 (2013-2015) > X1 35i xDrive
X3 Series
F25 X3 (2011-2017) > X3 sDrive28i
F25 X3 (2011-2017) > X3 xDrive28d Diesel
F25 X3 (2011-2017) > X3 xDrive28i
F25 X3 (2011-2017) > X3 xDrive35i
X4 Series
F26 X4 (2015-2018) > X4 28i xDrive
F26 X4 (2015-2018) > X4 35i xDrive
F26 X4 (2015-2018) > X4 M40i xDrive
X5 Series
E70 X5 (07-13) > X5 3.0si
E70 X5 (07-13) > X5 4.8i
E70 X5 (07-13) > X5 M
E70 X5 (07-13) > X5 xDrive35d
E70 X5 (07-13) > X5 xDrive35i
E70 X5 (07-13) > X5 xDrive50i
X6 Series
E71 X6 (2008-2014) > X6 M
E71 X6 (2008-2014) > X6 xDrive35i
E71 X6 (2008-2014) > X6 xDrive50i
Z Series
E89 Z4 (2009-2016) > Z4 sDrive28i
E89 Z4 (2009-2016) > Z4 sDrive30i
E89 Z4 (2009-2016) > Z4 sDrive35i
E89 Z4 (2009-2016) > Z4 sDrive35is