Transponder Key Programming Overview
Most vehicles built after the mid-1990s use transponder keys â keys with a small electronic chip embedded in the head that communicates with the car's immobilizer. If the chip is missing, damaged, or not programmed to your vehicle, the engine will crank but refuse to start. A qualified automotive locksmith can cut a new key blade and program the chip to match your vehicle's ECU, restoring normal start function.
To prepare for this service, locate your vehicle identification number (VIN), typically found on a sticker at the base of the windshield on the driver's side or on your registration card. Also confirm the year, make, and model. Some vehicles require the original working key to be present during programming, so let the pro know upfront if all keys are lost.
- Covers a wide range of domestic, Asian, and European vehicle brands
- Requires your VIN and vehicle year, make, and model for key cutting
- Some models require at least one working key present to add a second
- Programming is done on-site at your vehicle â no towing required in most cases
- Ask the pro whether your vehicle model requires dealer-level programming tools
