If it is the key that opens and starts the car about $75.00 from ford dealer
Its a programmable chip inside of the key .
No. I have both a 2001 LE and a 2005 LE. The latter has a chip inside the key, where as the 2001 doesn't.
in the key
Take the old key to ACE Hardware, and they'll cut you a new key, if that's what you're asking about (key fob).
Your original key is micro chipped and coded, your new key most likely has no chip in it. Car won't start unless the micro chip in the key and the car are programmed to match.
how to open and change the battery of ford focus 56 reg
Get the key
Yes, Precision Tune did ours. Don't try it yourself. They can also set the key recognition.
If you had the key made and it doesn't have a chip that would probably be the problem or your old key is has a bad chip.