transponder key programming
https://page-wiki.win/index.php/How_to_Find_Affordable_Car_Key_Replacement_Without_Cutting_Corners
Getting a spare transponder key programmed for your car often feels like a secret handshake between the key and the vehicle’s computer. The process involves a small device that talks to your car’s immobilizer system, teaching it to recognize the new chip. It's a quick job if you have the right gear, but without it, you're usually stuck visiting a locksmith or dealership.