Well imagine my surprise when I did a quick internet search and found over a million hits for "Nissan" "Bluetooth problems"
Anyway as a point of info for everyone, I just bought a 2012 Nissan Altima Coupe with all the packages (tech, nav etc...)
I have an iPhone 4s, 5.1.1, Verizon
When I first started using the car the Bluetooth paired just fine, it would automatically reconnect when I reentered the car, the answer/talk/hang-up etc... all worked.
Then one day I get in the car and my audio starts playing from my phone but it sounds, "sped up" almost like I was holding down a fast forward button , it would play a second of sped up audio, then silence, then sped up audio for one second, repeat over and over again. Sometimes it gets "fixed" if I switch sources (am, fm, xm, music box etc...) sometimes I have to either turn off the car Bluetooth (which you can only do when not moving) or turn off my phone Bluetooth to reconnect and then sometimes it works, sometimes it doesn't. The good thing is it eventually will work for some time but then again sometimes the connection will randomly drop, or some functionality is lost (audio plays but I can't see the song/album/artist info)
Anyway, I find it amusing that this is neither Apple's nor Nissan's fault according to the responses here I've read from reps for both. I am sure if we asked the Bluetooth SIG they would tell us it's Apple's and/or Nissan's fault. Typical in our society today, it's always someone else's fault, no accountability, no willingness to actually solve the problem until enough people scream and shout that it eventually get "fixed" that is until it breaks once again some time down the line. I guess the "solution" is to keep hounding Apple and Nissan (and apparently other car manufacturers) until someone does something about it, but I don't think I will hold my breath. I guess I will just have to hope continually pairing/unpairing my phone resolves the issue enough so I can utilize the functionality both companies so loudly proclaim as important features they provide, that is until they become silent and point fingers at the “other guy” when it fails to work at all.