yes..all locker is diffrent...from boot,front both door and igition to start engine.all is diiffrent..buat pencuri jadi bingu..hahaha!!!!about immobilizer is sensor..some is batang one and another some is card..touch each other(form red light change to yellow or blue light)then u only can start up engine..now all new car also using immobilizer system...but i feel it is best from pencuri..but bad for girl who wan run away from someone who wan rob or rape them..buang masa find sensor..am sure they cant find it out dalam masa ketakutan kan?agree?ada baik dan buruk kesan bila using immobilizer system..correct me if am wrong