[RossBMWZseries]

Not sure if this is the same thing issue I'm having (along with the rest of the symptoms) but sometimes my key fob won't unlock the car and the alarm remains ON as I can see the red nose blinking under the rear view mirror. Putting the key in the door won't unlock it either. What I do in that case, I go to the trunk, open it manually, disconnect the negative terminal, alarm goes off, reconnect negative cable, then key fob works just fine and i'm able to unlock the car.