After the mid- to late 1990s, manufacturers began placing a transponder chip in the plastic head of the car key. The chip emits a signal to a receiver in the ignition. If this "immobilizer" detects the wrong signal — meaning that the wrong key is in the ignition — the vehicle will not start.

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comprehensive international trading company integrating production and trade. The main products are auto parts, security tools, car keys, auto diagnostic tools and key cutting machines.（China car key shell)

Now, more and more families have their own cars. The car keys equipped with each model are different, and some people may dislike the appearance of their car keys. So, can the shell of the car key be replaced?