Many newer model vehicles have keys that are electronically encoded. As a result the $3.00 key that you have cut at the hardware or someplace else may open the door and allow the ignition lock to turn but the vehicle will not start. A replacement encoded key can set you back over a hundred bucks.
Originally Posted by Chainsaw Anthropologist
Do a little research. On many cars, you can program a new key yourself. Buy a blank key of the right type online, have a local locksmith cut the key to mechanically match your car. Then go through a special sequence of actions on the car, and you will program the new key to work.
Cost me about $50 for two new keys, from ikeyless.com.
On Fords it's important to do this. They give you two keys and it requires two keys to program a new key yourself. If you lose one key, you have to pay the dealer big bucks to program a new key for you. If you lose both keys, it's mucho MUCHO more bucks to get a new working key.
Sorry to wander so far afield, but I HATE seeing people get ripped of by the replacement car key scam the manufacturers do these days.