This device is designed to work with factory anti-theft system (immobilizer) EWS. Immobilizer EWS has been installed on the BMW AG vehicles since 1996. Cars such as BMW 3 series (E46), 5 series (E39), 7 series (E38), X3 (E83), X5 (E53), Z4 (E85) and other vehicles of BMW AG - MiniCooper, Rover 75, Range Rover are equipped with this system.