Quote:
Originally Posted by rph74
I looked on realoem, and yes the part I am speaking of is called the water valve...
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Thank you for the link and the information, rph74. That is very helpful
The Bentley manual calls this the Heater valve (replacement on page 640-13). Unfortunately, it requires draining the coolant. On the plus side, the part is only ~$170.
Edit: BTW, for the 04+ at least, the part number is different. Here is the RealOEM diagram for the N62 engine:
http://www.realoem.com/bmw/showparts.do?model=FB53&mospid=47747&btnr=64_1412& hg=64&fg=18