Abstract: An immobilizer system for a vehicle and an immobilizer set including an immobilizer system and a switch key equipped with a transponder is provided. The immobilizer system includes: a native transmitter-receiver unit integrated into the vehicle, the native transmitter-receiver unit including a native antenna and being configured so as to enable a wireless communication with a transponder associated with a switch key, and a locking device for allowing or preventing the wireless communication between the native transmitter-receiver unit and the transponder, the locking device including: a locking antenna arranged in the vicinity of the native antenna, and a control unit configured to control the locking antenna in an enabled state, wherein the locking antenna does not interfere with the wireless communication between the native transmitter-receiver unit and the transponder, or in a locking state, wherein the locking antenna does interfere with the wireless communication.

Abstract: A vehicle anti-theft system, includes in a passive relay enabling an electronic label (2) usually identified when proximate to a transponder (1) to be offset. The electronic label (2) is integrated in a reinforced casing. Communication between the label and the transponder (1) is set up via an antenna (4) proximate the transponder (1), an electric cable and a second antenna (5) proximate the label. The cable includes an electromechanical switch enabling a control switch (8) to interrupt or set up the radio link. The invention therefore provides a novel anti-theft system for which the installation is entirely reversible and having no damaging effect on the vehicle since it does not require disconnecting a vehicle cable and entails no splicing.

Abstract: A vehicle anti-theft system, includes in a passive relay enabling an electronic label (2) usually identified when proximate to a transponder (1) to be offset. The electronic label (2) is integrated in a reinforced casing. Communication between the label and the transponder (1) is set up via an antenna (4) proximate the transponder (1), an electric cable and a second antenna (5) proximate the label. The cable includes an electromechanical switch enabling a control switch (8) to interrupt or set up the radio link. The invention therefore provides a novel anti-theft system for which the installation is entirely reversible and having no damaging effect on the vehicle since it does not require disconnecting a vehicle cable and entails no splicing.