You have to buy a key with a chip, only 5 chips total were manufactured for each car, from the dealer. Once you have one of those keys with a chip in it for your car, you can take it to whom-ever you want to get it cut and you can program it yourself to unlock the doors etc..... If a previous owner has already purchased all 5 of the chips...... you have to replace the anti-theft/start system on the car so you can get 5 more keys.....way expensive!