Audi A4 B8 Transmitting Receiving Unit Road Toll System 4F0035503E

Audi A4 B8 Transmitting Receiving Unit Road Toll System is a specialized component from the Electronic control modules and controllers group, responsible for operating the antenna system related to electronic road toll collection in selected Audi models. This solution allows for maintaining the full functionality of the factory system, ensuring stable communication with toll infrastructure and proper cooperation with the vehicle's other electronic components.

Specifications and technical data

• SKU: 4F0035503E
• Mark: Audi
• Condition: Used
• OEM Part Number: 4F0035503E
• Substitutable numbers: 4F0035503E, 4F0 035 503 E
• Category: ECUs & Computer Modules

Purpose and function of the module

The presented antenna controller has been designed as an element of Audi's factory electronic architecture, integrated with the vehicle's installation and communication bus. Its task is to handle the antenna signal related to the road toll collection system so that the vehicle can be correctly identified by external systems and devices.

Thanks to its dedicated design, the module works with other controllers in the car, which allows for maintaining configuration consistency, reducing communication errors, and easier diagnostics when needed. Using an original solution from this group of components helps maintain the stability of the entire electrical system.

Benefits of using an original controller

Using a factory module from the Electronic control modules and controllers group in place of a faulty component allows for maintaining the parameters specified by the vehicle manufacturer. The appropriate operating characteristics, fitment with electrical harnesses, and compatibility with vehicle software reduce the risk of communication problems, system errors, and improper operation of toll-related functions.

An element of this type is particularly important in cars used intensively on toll roads, where reliable road toll system operation translates into smooth travel and no disruptions in trip registration. Choosing an original controller also facilitates service – the module is recognized by factory diagnostic tools, which speeds up configuration and any necessary coding.

Product characteristics and condition

The offered module comes from an Audi vehicle and is marked as a used original part. This means it is a dismantled part that retains its factory design and purpose, while also serving as an economical alternative to a new component. This type of solution is often chosen for electronics repairs where it is crucial to combine proper functionality with a reasonable cost.

A used road toll antenna controller can be a good choice in situations where the existing module has been damaged, generates system errors, or causes problems with vehicle identification by external infrastructure. Replacing it with a functional element from the same group allows for restoring proper system operation without the need for costly installation modifications.

Selection and integration with vehicle electronics

When selecting a road toll antenna controller, it is crucial to match it to the specific vehicle configuration and its equipment. In practice, this means paying attention to compatibility with the model platform, electrical architecture, and applied auxiliary systems. A properly selected module facilitates installation, reduces the need for wiring modifications, and allows for maintaining the factory routing of cables and mounts.

If you want to better understand when choosing a used controller makes sense, how to evaluate the cost-effectiveness of such a repair, and what to look for when buying second-hand electronics, it is worth reading our guide: The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?.

Expanding the electronics system in Audi

If you are planning a comprehensive repair or upgrade of the onboard electronics in your Audi and need other elements from the same group, such as additional controllers, communication modules, or signal management systems, check out the available parts in the Audi electronic control modules and controllers category.

By using consistent solutions from the same group of components, you can maintain a uniform electronics architecture, which facilitates diagnostics, service, and any future vehicle equipment modifications.