the passkey system is excellent.it requires a key that is programmed to the vehicle to start it. there is a magnet and a window in the ignition cylinder that sends the signal to the bcm then to the pcm then to the starter. it is virtually unhackable. as far as the content theft ststem it is very effective if anyone breaks a window or slimjims the door it will shut the entire system down until it is turned off. in my opinion the factory system is very effective. no need for any aftermarket alarm that you won't be able to get parts for in 2 years. just my opinion and experience
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