The OEM Radio Antenna Booster, part number 8E5035225P, is an essential component located within the Audi A4, S4, and RS4 models, specifically designed to enhance radio signal reception. Situated near the vehicle's audio system, this booster seamlessly interfaces with the antenna to amplify incoming AM/FM signals, ensuring clear and uninterrupted audio play. Common issues such as poor radio reception or intermittent audio can indicate the need for replacement. This part is compatible with multiple engine configurations, including the 3.2L V6 and 4.2L V8 found in models from 2003 to 2008. It is also known by alternative names such as "Antenna Booster" and replaces part numbers including 8E5035225B and 8E5035225AF.