Sounds like you're asking if using a phone that was NOT compatible with your X5's bluetooth will damage you bluetooth? My guess in no. Before my iPhone I used a palm 700P which was not on the list but worked. My question would be what are they saying
happened to your bluetooth? Did they give you an explanation? Just take your vehicle to another dealer for a second opinion

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"What you hear in a great jazz band is the sound of democracy. “The jazz band works best when participation is shaped by intelligent communication.”
Harmony happens whenever different parts get to form a whole by means of congruity, concord, symetry, consistency, conformity, correspondence, agreement, accord, unity, consonance…….