In my experience I've come to realise that installing any kind of security system is not a complete guarantee that your car is now a 100% safe.
If it's electronic it will very likely be easily overrided one way or the other and as we know most of the car these days are more tech savvy than earlier versions and this trend will only continue making our cars more vulnerable.
These systems , whatever kind they may be at most are a delay mechanism or slight deterrents in case the worse happens Khudanakhwasta.
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