Audi A4 S4 B9 Antenna Amplifier Aerial Module Control Unit 8W5035225

Audi A4 S4 B9 Antenna Amplifier Aerial Module Control Unit is an original part from the Car antennas group, designed for the radio signal and data reception system in Audi vehicles. Designed as an OEM component, it ensures stable operation of the factory multimedia system and proper communication with the vehicle's electrical installation.

Specifications and technical data

• SKU: 8W5035225
• Mark: Audi
• Condition: Used
• OEM Part Number: 8W5035225
• Substitutable numbers: 8W5035225, 8W5 035 225
• Category: Antennas

Purpose and function of the antenna module

Audi A4 S4 B9 Antenna Amplifier Aerial Module Control Unit is responsible for amplifying and distributing signals from the vehicle's antennas to the control and multimedia units. Thanks to its factory design, it works with the vehicle's installation without the need for modifications, maintaining the parameters specified by the manufacturer.

The module operates within the bodywork system, connected to the original wiring harness, which allows for maintaining the integrity of the electrical system. Proper shielding and impedance matching reduce interference, which translates into more stable reception of radio signals and other services using car antennas.

Benefits of using an original Audi antenna amplifier

Using an original antenna module instead of a damaged or incompatible part allows you to:

• maintain proper cooperation with the factory multimedia system and body electronics,
• preserve the antenna system operating parameters specified by the manufacturer,
• avoid communication problems resulting from the use of replacements with different characteristics.

An element from the Car antennas group of this type is particularly important in premium vehicles, where many comfort and connectivity functions rely on stable signal reception.

Product characteristics and condition

The offered module comes from an Audi vehicle and is marked as a used original part. Such OEM components are designed for long-term operation, and their construction is matched to the electrical architecture of a specific model generation.

Choosing a used original allows you to maintain the consistency of the antenna system while reducing costs compared to purchasing a new part. This is a particularly beneficial solution for vehicle repairs where compliance with the factory configuration is crucial.

Application in service and vehicle modernization

The antenna amplifier module will work well both for standard repairs after a failure and for restoring full system functionality after interference with the body installation (e.g., replacement of the windshield, roof elements, or tailgate). Thanks to its factory origin, it facilitates diagnostics – the module's operating parameters are recognized by service systems in accordance with the manufacturer's assumptions.

If you are planning a comprehensive repair or modernization of the body area responsible for signal reception in your Audi and need other elements from the same group, such as antenna bases, antenna cables, or additional amplifier modules, check the available parts in the Audi car antennas category.

Why it is worth choosing used originals for premium cars

The market for premium car parts is increasingly based on proven OEM components from dismantling. In the case of brands such as Audi, choosing a used antenna module allows you to maintain high build quality and full compatibility with the vehicle's electronics, while reducing the risk associated with uncertain replacements.

If you want to better understand why used original parts are becoming the preferred solution in the premium car segment, it is worth reading the article: Crisis in the new parts market? Why used originals for premium cars are the hottest trend in 2026.