can you please clarify exactly what is not working?
Both keys do not operate the central locking system, either to lock or unlock, except on very few random one-off occasions. Once I'm in the car the keys operate the ignition perfectly OK.
this could simply be two weak key batteries.
it could also be a problem with the remote receiver / central locking system on the vehicle
you can always check fuses as well, but this is unlikely to be fuse related.
a bmw garage has the equipment to check this quite easily so it should not be a difficult or time consuming diagnostic. more than likely you will require either a new key, or some parts replacement and/or reprogramming
Sorry if you were hoping for a different answer, please don't shoot the messenger - I can only give the honest answer, which I have. Please remember that a low rating PUNISHES me for my honest and prompt response, and I receive nothing for my time and answer until a positive rating is clicked.Please let me know if you have further questions. Please do not forget to click a positive rating as this is the only way I receive credit for my answer, thank you. Best wishes with your vehicle.