In 2007 they generally had both a TCU and a Mulf which means two connectors
you should check for that.
You want to get a Mulf 2 Hi as it will give you USB and it's actually the only thing
you need plugged in as it supports the phone all by itself but not SOS which is
useless now as it's unsupported .
Look at part No's on the box they use the same parts in Most Cars where they can.
Same Motor same Stereo etc etc..
http://www.e90post.com/forums/showthread.php?t=1181654
There are many Mulf retrofit thread.
It will more than likely need programming.