Do I Need to Replace a Lost Car Key?

[WillowLynn]

If you've lost one of your two car keys, you will need to get a replacement. Below is relevant information about car keys: 1. Battery Replacement Interval: Car key batteries are typically button cells that need replacement every one and a half years, while cylindrical two-way remote control batteries require replacement approximately every six months. 2. Reception Range: The maximum reception distance is about 50 meters, achievable only under conditions of no electronic interference and no obstructions. Typically, the signal is strongest and most easily received within a range of about 10 meters. 3. Working Principle: The key emits a weak radio wave, which is received by the car's antenna. The electronic control unit (ECU) then identifies the signal code, and the system's actuator (motor or electromagnetic coil) performs the lock/unlock action.