Genuine OEM Audi Left Upper Antenna Amplifier, part number 4M8035225B. 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 left upper section of the vehicle, integrated into the antenna assembly. Weighing approximately 0.056 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.