Hi, I have a 2004 A8 D3 and the remote key fob often does not work. I have changed the key battery plenty of times but the car is still showing on the dash sometimes that the key fob battery needs to be replaced.

It seems though that the car 'forgets' the key. If I unlock the car by using the key in the drivers door lock, and then turn the key on and off in the ignition lock then it will normally work again once or twice, but then a few minutes later the remote does nothing again.

I only have one key for the car so I don't have another to test with it. Does anyone a rough cost for a replacement key? I've heard that a8 keys are dealer only, are there any cheaper options? I'm near Birmingham UK.

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