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Programming Car Keys Smart keys and key fobs are now standard in many cars. They need to be programmed to work correctly. Programming can be performed in a car dealership or using specialized tools. Hardware stores are unable to duplicate keys for modern cars. Most customers will end in a dealership or locksmith. Stores that provide these tools can help customers make replacement keys, restore immobilizer information and more. Keys with transponders There are a myriad of different car keys available on market.