Transponder Key

A transponder chip disarms an automobile immobiliser once the auto key is used to begin the engine. The vast majority of keys to automobiles constructed after 1995 include transponder processors.

After the auto key is turned in the ignition, then the engine controller unit (ECU) on the automobile sends a digital message to the essential, and it’ll enable the car to begin just provided it gets the proper message back. So even for a very simple automobile key with no buttons, the main has to be trimmed properly to turn the locks and programmed properly to disarm the immobiliser. Car keys with processors could be programmed by programmers that are special.

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