REMOTE central locking is standard on Premacy and is linked with the standard engine immobiliser system to alter the ID code each time the transmitter is operated. Any attempt to use a key other than a Mazda-supplied electromagnetic key disables the fuel and ignition systems, making it virtually impossible to start the engine. This prevents the vehicle being stolen with a duplicate key. The Premacy locks also deadlocks when the remote keypad's locking button is pressed twice or the key cylinder on the driver's door is turned twice in the locking direction. Premacy also features a steering shaft declutching device to prevent thieves from breaking the steering lock.