you can get the blank that can be programmed to open the car, even to arm it but will not start the engine - there are unfortunate cases when original keys lose synchronization with the car, and that key is bricked, and will NEVER start the engine... it is done for the protection, to prevent some unscrupoluos locksmiths supply crooks with the keys to your BMW, based off the VIN that is visible on your dash... you will need to prove ownership to the dealer before a key is cut...