Well, let me say that on my 1999 expedition,you can program the new keys if the right chip is in the key. You need both Original keys, insert one and turn on the ignition but do not start the engine, then put in the second Original key and turn it on but not to start, then put in the new key and turn it on but not to start and it will be programmed. I have kept my Original keys in a safe to avoid the "go to the dealer for key and recoding" expense. vann | 
