module sits in a black box UNDER the air compressor/right next to the battery. its covered by black plastic that you have to uncover to see these modules.
see this thread (has a PDF of exactly where it is hiding)

http://www.xoutpost.com/bmw-sav-foru...ation-pdf.html

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I swear, my cars are like a girlfriend.
Sometimes its a rough ride, sometimes its smooth motorin'.
Sometimes she doesnt like how i treat her and sometimes i dont like how she behaves.
BUT at the end of the day, she loves it when I am inside her.

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'91 850i
'05 X5 4.4i
'09 Clubman S