I purchased my 2008 Mazda CX-9 gt last July and the Bluetooth worked just fine when I purchased it. I want to say around December of last year it stopped working. It would occasionally work but not all the time. It would even stop working sometimes when I was on a call then start again. For the past 3 months it hasn't worked at all. I have tried to disconnect my battery and that didn't help. Please, if anyone has any advice I would love to hear it!