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Automotive Locksmith Key Programming Most modern-day cars require some form of key programming. Depending on the model and make, the process may be as simple as using a spare key to program the onboard computer or as complicated as OBD2 programming or EEPROM. Most US and Asian car makers share their programming protocols with auto tool makers so that they can develop hardware and software for automotive locksmiths to use. Transponder Chips The majority of newer cars have transponder