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In this video I show how to program a replacement keyfob on a 2002 Jetta. I got a new keyfob from the dealer to replace the original damaged one. This programming requires 2 keys because you need one in the ignition and one in the door at the same time.
Procedure is this.
1. With new keyfob installed onto the old switch-blade/transponder portion of the key insert the key into the ignition with the buttons facing down.
2. Turn the key to the on position but don't start the car. Just until the lights light up on the dash.
3. Get out of the vehicle and shut door. Then insert the second key into the door and turn to lock and then turn to unlock.
4. get back into vehicle and press the unlock button on the keyfob for 1 second, then let up for 1 second, press for 1 second. You should hear the horn honk. If the horn didn't honk then let off and press again. Did the horn honk? if not let off and press again. Did the horn honk? If not then then see below. If the horn did honk move to next step.
5. Shut door and test out the keyfob. if the horn honked then the buttons should work.
If the horn doesn't honk then something is wrong.
1.Does the horn and the alarm work? maybe you just didn't hear it
2.The max number of programmed keyfobs is 4. Even if they are lost the computer still hold the programming. It may need to go to the dealer to wipe the programming and start out new.
3. The door lock switch didn't read that the key was moved to lock and unlock
4. The new keyfob isn't the right one for the vehicle
Also I'm sure someone will comment at some point that you can just stick your arm out the window and turn the key but there is a reason I don't recommend this. On a VW the windows can be rolled up and down with the key in the door and I don't want people to roll up their arm or head in the window. Just get out of the vehicle or have a friend stand next to the car and operate the key.