What is the maximum effective distance for a car key?

1 Answers
StWeston
07/30/25 4:35am
The maximum reception distance for a car key remote is approximately 50 meters. This distance is achievable only under conditions without any electronic interference or obstacles blocking the signal. Typically, the signal is strong and most easily received within a range of over 10 meters. Additionally, the reception distance is related to the quality of the remote key and other factors. A remote key allows for the remote unlocking and locking of doors without inserting the key into the keyhole. Its advantages include: regardless of day or night, there's no need to locate the keyhole, enabling convenient long-distance unlocking and locking. The remote key emits a weak radio wave from the key, which is received by the car's antenna. The signal code is then identified by the electronic control unit (ECU), and the system's actuator performs the action of unlocking or locking. This system mainly consists of two parts: the transmitter and the receiver.
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