Part number 61.12-0 137 616 is the most popular part people use for bluetooth antenna cables on TCU and ULF modules. I have no idea what else there would be out there.

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2000 E38 750iL Highline Edition, Upgraded with the lastest 2006 X5 Electronics
MKIV Navigation, 16:9 Display, Bluetooth, TV/Video with Backup Camera, Sirius, and Aux Input