Remote car key types and operation

https://extra-wiki.win/index.php/Remote_car_key_types_and_operation

Remote car keys have evolved from simple infrared units to more secure radio frequency and smart key fobs. Basic remotes send a coded signal to unlock your car, while proximity keys use rolling codes that change each time to prevent hacking. Modern fobs sometimes operate passive entry—unlocking automatically as you approach—but still rely on a physical backup blade inside the fob. Newer phone-based digital keys work via Bluetooth or NFC, turning your smartphone into a virtual remote. Understand…