Just thought I'd update all those who have been having bluetooth force close problems with their cars. As a little history, my temasek i9300 was working great in every way until about V38 or so, then bluetooth would force close every time it paired with my car. After finally getting up to V42 with no solution, I did a full wipe and installed V42 again. Same problem, bluetooth force closes upon pairing with my car. So instead I did a full wipe and then installed the unmodified CM11 with the CM phone and PC installer. No more bluetooth issues, so that seems to indicate the issue comes in sometime after the CM basecode is tweaked. Both are 4.4.2, but for some reason I get force close on temasek after a full wipe and I don't get one on CM11 after a full wipe. I know many people were saying the problem was in the original CM11 code, and at least in my test this doesn't seem to be the case. Just an FYI, your mileage may vary.
Full of crap
I don't import external Bluetooth stuffs, only cm.