And to add to this, there are two separate programming steps:
- if the car has the immobiliser system (most '01 and later), then the car has to be taken to the dealership, and the keys matched to the instrument cluster. I have the ability to do this, but cannot get the 7 digit key code from the dealers
- the remote transmitter needs to be programmed to the car in order for keyless entry to work. You need at least two working keys to do this yourself