Genuine OEM Audi Antenna Amplifier, part number 4K5035225P. This electronic module is designed to boost radio and communication signals, ensuring clear and reliable reception for various vehicle systems. It is typically located within the roof structure, often near the rear, to optimize signal acquisition. Measuring approximately 115mm in length, it is a compact yet crucial component. Choosing a genuine OEM amplifier ensures correct signal processing and seamless integration with the vehicle's existing antenna and infotainment systems.