Genuine OEM Audi Rear Upper Centre Antenna Amplifier, part number 4M8035225G. This electronic module is designed to boost the signal received by the vehicle's antenna system, improving reception quality for radio and other communication functions. It is positioned in the rear upper centre section of the vehicle, integrated into the antenna assembly. Weighing approximately 0.057 kg, it is a compact yet vital component. Choosing a genuine OEM amplifier ensures correct signal processing, frequency tuning, and seamless integration with the vehicle's complex electrical architecture, preventing signal degradation or interference.