Most cars built since the late 1990s use a transponder chip that must be programmed to the vehicle. An auto locksmith cuts and programs transponder keys so the engine will start.
A transponder key contains a small chip in the head that communicates with the car's immobilizer when you turn the ignition. If the chip is not recognized, the engine will crank but not start, or will start and immediately stall. Because the chip must be matched to your specific vehicle, a properly cut key alone is not enough — it also has to be programmed.
A mobile auto locksmith carries diagnostic and programming equipment to pair a new transponder key to your immobilizer at your location. Programming procedures differ by manufacturer, and some vehicles have a security waiting period before a new key accepts. Having the VIN and proof of ownership ready helps the technician confirm the correct key and process.
Call for help: (877) 771-4458 — a straight answer and an honest estimate before any work begins.