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doesn’t require the car owner to activate it; it operates automatically. An immobilizer is
considered as providing much more effective anti-theft protection than an audible alarm
alone; many auto insurance companies offer lower rates for vehicles that are equipped
with an immobilizer.
As an anti-theft device, an immobilizer disables one of the systems needed to start a
car's engine, usually the fuel supply or the ignition. This is accomplished by radio
frequency identification between a transponder in the ignition key and a radio frequency
reader in the steering column. When the key is placed in the ignition, the transponder
sends a signal with a unique identification code to the reader, which relays it to a
receiver in the vehicle's computer control module. If the code is correct, the computer
allows the fuel supply and ignition systems to operate and start the engine. If the code
is incorrect or absent, the computer disables the system, and the engine will be unable
to start until the correct key is placed in the ignition.
The IMMO service can disable a lost vehicle key and program the replacement key fob.
One or more replacement key fobs can be programmed.
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