I have been using my Myfi with my aux input for months now. No issues whatsoever (and I have nav and dsp). I personally installed my aux input in the glovebox. I use a converter to plug the power into the flashlight port in the glovebox. I also run a ground loop isolator between the myfi and the aux input to get rid of whine. But I have no problems.

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05 X3 3.0 Sp, Prem, Xenons, CW, Nav, DSP, 6-Speed, Privacy Glass, Servotronic [/IMG] http://randall-harris.com/sitebuilder/images/IMG_3399-600x450.jpg[/IMG]