The Perodua Alza Antenna Mast is a component of the vehicle's radio system that is responsible for receiving radio signals. It is typically located on the roof of the car and consists of a long, slender metal rod that extends upwards. The antenna mast is adjustable and can be raised or lowered to improve the quality of the radio reception. In the case of the Perodua Alza, the antenna mast may need to be replaced if it becomes damaged or if the radio reception is poor due to a malfunctioning antenna.