Audi A4 B8 A5 8T A6 C7 A7 4G Remote Key Fob Module 4H0959754K

Used key – requires programming

The key requires programming (coding) by a specialist to be fully functional.

Audi A4 B8 A5 8T A6 C7 A7 4G Remote Key Fob Module is an original component from the Electronic control modules and controllers group, designed to work with the factory remote control and access authorization system in selected Audi models. It enables proper operation of the remote key functions, ensuring consistent performance with the vehicle's electrical installation and other onboard controllers.

Specifications and technical data

• SKU: 4H0959754K
• Mark: Audi
• Condition: Used
• OEM Part Number: 4H0959754K
• Substitutable numbers: 4H0959754K, 4H0 959 754 K, 4H0959754DD, 4H0 959 754 DD
• Category: ECUs & Computer Modules

Purpose and function of the module

The presented remote key fob module is designed for integration with the comfort system and the remote central locking system in selected mid-range and premium Audi models. As a component responsible for communication with the key, it works with the vehicle's electrical system, enabling functions such as remote locking and unlocking, as well as initiating the vehicle start procedure in accordance with factory configuration.

Thanks to a design compliant with the manufacturer's standards, the module operates within the vehicle's onboard network architecture, communicating with other body control units. Proper matching to a specific generation of Audi models reduces the risk of compatibility issues and facilitates the adaptation process in the vehicle.

Benefits of using an original module

Using an original remote key fob module instead of a damaged component allows for restoring the correct operation of the remote control system without interfering with the electrical installation. This is a particularly beneficial solution for vehicles where the consistency of body electronics and the preservation of factory comfort functions are essential.

• Full integration with the factory electrical installation and other body controllers.
• Possibility to restore remote control functions after a failure of the previous module.
• Reduced risk of communication errors in the vehicle network due to the use of a component compliant with the manufacturer's design.
• A preferred solution for professional repairs of comfort systems and body electronics.

Product characteristics and installation

The module belongs to the Electronic control modules and controllers group, which means it works with the vehicle's communication bus and requires proper configuration during installation. In practice, installation involves mechanical mounting in the designated location and connection to the wiring harness, followed by – depending on service procedures – appropriate adaptation using diagnostic tools.

Due to the nature of automotive electronics, installation by a person with experience in working with control modules is recommended, which helps avoid damage to the installation and communication problems within the vehicle network. This type of component is often chosen for comfort system repairs when problems with remote control operation or communication with the key occur.

Product condition and practical application

The offered module is a secondary market component, which provides an attractive cost-effective solution while maintaining compliance with factory specifications. In practice, this allows for an economical repair of the comfort system in Audi vehicles where replacing it with a new controller would be uneconomical in relation to the car's value.

Such a solution is particularly interesting for workshops specializing in automotive electronics and for users who want to restore full functionality of the remote control system while maintaining a reasonable repair budget.

Technical support and electronics selection

If you are considering using a used control module in your car and want to better understand when such a solution is justified, it is worth reading the guide on our blog: The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?

If you are planning a comprehensive repair or upgrade of the body electronics area in your Audi and need other components from the same group, such as comfort controllers, door modules, or central locking management units, check the available parts in the Audi electronic control modules and controllers category.