Iphone 3GS w/ bluetooth stereo

So this might be the wrong category for this thread but I want to ask:

Has anyone had issues since the IOS 5 update w/ using the 3GS with the Pioneer bluetooth car stereos? I have a USB in cable and the update has made the phone almost useless w/ the stereo. It keeps just randomly rebooting.

If you're using a cable you wouldn't be using Bluetooth which is wireless.

I'd think the update and the problem may be coincidental. I'd try getting a different cable to see if that fixes the hardwired connection.

Sorry just was describing the type of stereo as bluetooth. Indeed I"m using the USB cable. The bluetooth connection still works fine. I've already tried replacing the cable and no difference. Never had a problem until the IOS 5 update.