No, the E90 335i uses a completely different technology than the X3. So, your X3 ULF will not transfer. I could be wrong, but I thought that all new BMWs come with Bluetooth as standard.

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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