I had tried using the Jabra adapter with my Camry's BT system when I had my i500, no dice. I don't know that that means that it cannot work with any car's system, but I definitely struck out with mine.

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It's a pond. My god. It's JUST a pond!!!
WHAT AM I DOING WITH MY LIFE??!??!!???
-Thoreau, in a sudden moment of realization