Transponder Key Replacement in Monroe County, MI

A transponder key looks like a regular car key, but its head holds a small chip that communicates with your vehicle's immobilizer. When you turn the key, the car checks for that chip, and if it doesn't get the right signal, the engine won't start, even if the blade turns the ignition. Transponder key replacement means cutting a new blade to match your ignition and doors and then programming the chip so your vehicle accepts it. CS Lock and Key cuts and programs transponder keys for a wide range of vehicles, and we're affiliated with the National Automotive Service Task Force (NASTF).

A copy cut at a hardware store may open your doors, but without a programmed chip it won't start the car. That's why drivers who lose their only transponder key often end up stuck. Keys also wear down over the years, and a worn blade or a damaged chip can lead to the car refusing to start or the key sticking in the ignition. Having a properly programmed spare means one lost key doesn't turn into a towing bill. A replacement transponder key restores reliable starts and gives you peace of mind that your vehicle will be ready when you need it.

To make a transponder key, we need to verify ownership with your ID and the vehicle's registration or title. Please share the year, make and model ahead of time so we bring the right key blank and programming equipment. If you have an existing key, even a worn one, keep it with you, since it can speed up cutting and programming. If every key is lost, let us know when you call so we can plan for an all keys lost job. We come to the vehicle, cut the key and program the chip on site.