Here's a quick test... does any other Bluetooth phone work? If another compabitle BT phones works, then you are probably on your own. However, if a compatible BT phone does not work, then it is a warranty issue.

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SOLD
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