What is the frequency of the key in the car?

The frequency of a car key, particularly a key fob used for keyless entry, typically operates at either 315 MHz or 433 MHz, depending on the region and manufacturer. In the United States, 315 MHz is common, while 433 MHz is often used in Europe and other parts of the world. These frequencies enable signal transmission between the key fob and the vehicle's electronic systems for functions like locking and unlocking doors.