SIEMENS leas on the Move Siemens Automotive Description of the Siemens immobilizer system type Step This Siemens system isa vehicle immobilization system: The electronics devices: in the immobilization system are the immobilizer Steps.6 and a transponder. The immobilizer Sleepless is located rear. the vehicle's ignition lock. The transponder is located within the ignition key. The transponders magnetically couplet the Control Module.