Audi S4 B8 Antenna Amplifier Aerial Module Control Unit Left N/S 8K9035225M

Audi S4 B8 Antenna Amplifier Aerial Module Control Unit Left N/S is an original component from the Electronic control modules and drivers group, designed for precise management of the antenna signal in the vehicle. This used module ensures a factory fit with the Audi electrical system and stable operation of the radio and communication system.

Specifications and technical data

• SKU: 8K9035225M
• Mark: Audi
• Condition: Used
• OEM Part Number: 8K9035225M
• Substitutable numbers: 8K9035225M, 8K9 035 225 M
• Location on the vehicle: Left
• Category: ECUs & Computer Modules

Purpose and function of the module

The antenna amplifier mounted on the left side of the body is responsible for amplifying and distributing the antenna signal in the Audi S4 B8. As a dedicated control module, it works with factory wiring and multimedia units, minimizing interference and drops in reception quality.

The placement on the left side of the vehicle allows for optimal cable routing and maintenance of the original installation architecture, which is crucial during post-collision repairs or when replacing damaged body components.

Benefits of using an original Audi module

Using a factory antenna amplifier in the Audi S4 B8 primarily ensures:

• Full electrical compatibility with the vehicle's installation – no need for modifications to wiring or connectors.
• Stable operation of the radio and communication system thanks to the module's matched operating parameters.
• Consistency with other electronic control modules and drivers in the vehicle, which facilitates diagnostics and service.
• Reduced risk of errors in the comfort and infotainment system resulting from the use of unsuitable replacements.

Installation and integration with the vehicle's system

The antenna amplifier module designed for mounting on the left side of the vehicle is engineered as a plug-in component within the Audi S4 B8 body structure. Thanks to this:

• you maintain original mounting points and cable routing,
• you facilitate body and paint service work around the roof or the rear part of the body,
• you maintain the clarity of the electrical installation, which is important for future diagnostics.

When replacing the module, it is recommended to verify the condition of connectors, antenna cables, and the tightness of mounting points to ensure proper protection against moisture and vibrations.

Selecting the correct antenna amplifier

To select the appropriate antenna amplifier for the Audi S4 B8, it is worth using the OEM part number and vehicle data (model, year, body version). This helps avoid hardware and software compatibility issues, especially in cars equipped with advanced multimedia and navigation systems.

If you want to learn more about the safe selection of used electronic modules, selection by OEM number, and installation principles, check out the Global Parts guide: Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?

Expanding the electronics system in Audi

The antenna amplifier is part of a larger ecosystem of controllers responsible for comfort, connectivity, and multimedia. If you are planning a comprehensive repair or upgrade of the onboard electronics area in your Audi and need other components from the same group, such as comfort modules, multimedia system controllers, or body control units, check out the available parts in the Audi electronic control modules and drivers category.