subject: Lost Car Keys: Best Options [print this page] If you have one of the newer key fobs, you will need to get your transponder key system reprogrammed. Most people think they need to go to the dealership, but a specialized car locksmith, such as Green Car Locksmith San Diego, can handle transponder key programming on the spot. You can also go to the dealership, which will likely make you bring the car in and charge you more for the programming in addition. However, it is always advisable to compare prices before making a decision. If you do decide to go with a car locksmith, make sure the technicians are fully bonded and insured. If they damage your car, you don't want to be responsible for the repair fees.