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      06-09-2023, 02:01 PM   #16
jht3
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Drives: 2010 335i
Join Date: Jun 2023
Location: VA

iTrader: (0)

just discovered this thread after thinking this was normal on my 09/09 build

there is a significant high pitched hum noise, with a pop every ~3 seconds. been driving me nuts for YEARS

car is equipped with:
professional radio (cd, fm/am, satellite, aux, usb)
aux/usb in center console
TCU stacked on top of MULF2 in trunk

build codes:
S639 Preparation f mobile phone cpl. USA/CDN
S645 BMW US Radio
S655 Satellite tuner
S663 Radio BMW Professional
S697 Area-Code 1 for DVD
S6FL USB/audio interface
S6NF Music interface for Smartphone

i don't have an active sirius subscription in this car (i think the sat tuner is built into the radio?), but i do use the usb/aux port in the arm rest AND handsfree calling. i believe the RAD2 handles the sirius, and the MULF2 and TCU the USB/AUX and BT calling.

not sure which radio to look for, or how to tell what is being sold on ebay for example, as its a mess

RealOEM seems to show 2 viable part number:
65129350505
65129225849
Appreciate 0