My Mazda3 has no real issues with Bluetooth unless I connect to another car (or sometimes just a bluetooth speaker at home). The next time I get in my car it says it connects, music is playing on my phone, but no sound comes out of the speakers and no track information shows on the infotainment screen. It isn't fixed by disconnecting and reconnecting or a hard restart of my phone. Forgetting the car on my phone and trying to reconnect just gives a pairing error and the Mazda doesn't even show up as Mazda on the phone; it just says 'Handsfree device'. I've had success in the past with unpairing the phone, shutting of the car and the phone, restarting both, and then repairing from scratch but today that isn't even working. I still see music playing on the phone but there is no track info on the infotainment screen and no sound out of either the car or the phone. I'm pretty annoyed to say the least to have a brand new car that can't handle it when I occasionally connect to my boyfriend's car.