Genuine OEM Audi Antenna Amplifier, part number 4K5035225H. This component is crucial for strengthening radio and communication signals received by the vehicle's antenna system. It is positioned on the left side of the vehicle, typically near the rear window or roof line. Measuring approximately 115mm long, 20mm wide, and 27mm high, and weighing 0.063 kg, this amplifier ensures precise signal processing and seamless integration with the vehicle's complex electronic systems.