Which of the Two Car Keys is the Master Key?

1 Answers
MacMadelyn
07/29/25 1:10pm
Most cars have a master key that is remote-controlled, while the spare is mechanical. Relevant information is as follows: 1. The most obvious difference: The master key is button-operated and can unlock the car door by pressing the corresponding button on the key; the spare is mechanical and needs to be inserted into the keyhole on the car door to unlock it. However, many cars now have identical keys for both. 2. Composition of smart keys: A car smart key is a common keyless entry system, also known as an intelligent key system. It consists of a transmitter, a remote central locking control module, a driving authorization system control module (three receivers), and the related wiring harnesses that form the control system.
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