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Just installed mine... I had one on our 2011 E88 and it worked flawlessly... This is the first mod to my 2013 E89... a must for convenience sake.... and so much easier to install on my Z than my 1er... about a 10 minute job without the need of tools... well maybe a large flat head screwdriver to pry open the black plastic push on clips. I left the USB cable behind the little door in the interior trim, if ever I need to reconfigure/update the little guy in the future.
This really should be the way the top actuation buttons SHOULD operate from the factory!!
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