Central Locking

I have a problem with the central locking on my 3 series Touring. It seems to have stopped working. It has happened before and sorted itself out. Does anyone know how to sort it or what the problem is?

i had the exact ssame problem with my car. I have NO CluE why. -___-" it happens every now and then. When try to unlock my car with the remote, only the driver's seat door can be unlocked, the rest i have to actually climb in and unlock it by opening the door for the passengers, even the 'lock' button inside the car dun work -_-' ...i dun get it.

Check Fuses, Sounds Like A Bad Relay, If It Works Some Times Then Stops , Eventually It Will Stop Working Completely.