I have bluetooth issues more that occasionally; 2009 Acura TSX, but usually if I reset the phone I can get it to link back up if it gets broken. It does occasionally flip out if I get a text message while streaming audio.
What year is your car? Seems like the bluetooth "standard" is kind of loose and changing over the years.
Have you:
A) tried your phone in a friend's car and
B) tried your friend's phone in your car
to see who isnt' doing what?
Also, you may find a good owner's forum for your car out there. I know there are some for my car that I check in on from time-to-time.