The Rear Boot Actuator with Lock is a component of the Perodua Alza's power trunk system. It is an electronic device that is responsible for unlocking and opening the rear trunk of the car when the driver activates the trunk release button on the key fob or inside the car.

The Rear Boot Actuator with Lock is typically located near the trunk latch mechanism and is connected to the car's electrical system. When the driver activates the trunk release button, an electrical signal is sent to the actuator, causing it to unlock the trunk and activate the motor that opens the trunk.

The actuator also has a locking mechanism that can be engaged or disengaged to prevent unauthorized access to the trunk. This locking mechanism is controlled by the car's central locking system, which can be activated or deactivated by the driver using the key fob or the car's interior lock controls.