Remote Key Audi A4 S4 B7 8E Radio Alarm Key Fob Opener Button 8E0837220Q

Visual condition of the part

The product shows signs of use visible in the photos.

Remote Key Audi A4 S4 B7 8E Radio Alarm Key Fob Opener Button is an original component from the Electronic control modules and controllers group, designed for operating the central locking system, alarm, and radio control in Audi vehicles. The "flip" design ensures convenient use, and the integrated buttons allow for quick access to key vehicle functions.

Specifications and technical data

• SKU: 8E0837220Q-1
• Mark: Audi
• Condition: For parts or not working
• OEM Part Number: 8E0837220Q
• Substitutable numbers: 8E0837220Q, 8E0 837 220 Q
• Category: ECUs & Computer Modules

Purpose and function of the remote

The presented remote key has been designed as an element of the remote control system in Audi A4 and S4 models of the B7 generation. As part of the electronic system, it is responsible for:

• remote control of the central locking system,
• operation of the factory alarm,
• cooperation with the vehicle's radio system,
• integration with comfort electronics via the appropriate control module.

Thanks to its compact flip design, the key is handy, and the buttons are easily accessible and legible for everyday use.

Construction and technical aspects

The remote housing combines the mechanical part of the key with the electronic part responsible for communication with the vehicle. Inside, there is an electronic circuit board that works with the control system, assigned to a specific Audi configuration. The layout of the buttons has been selected to allow intuitive operation of the lock, alarm, and radio functions without distracting the driver.

As an item in the Electronic control modules and controllers category, the remote key works with other modules in the vehicle, creating a coherent comfort and safety system. Proper matching to the specific part reference is crucial for the correct operation of the system.

Product condition and service application

The product is offered in a condition defined as for parts or not working, which means it is best treated as a base for obtaining components or for service and diagnostic purposes. It can be used, among other things, for:

• recovering the housing or selected electronic components,
• comparing the electronic layout during fault diagnosis,
• training and testing for workshops dealing with key and comfort module programming.

For professional automotive electronics services, such a remote key is a useful source of parts and reference material for repairing remote control systems.

Selection and vehicle compatibility

To correctly select this remote for a specific Audi vehicle, it is recommended to verify compatibility with the OEM part number and interchangeable numbers in the service documentation or the manufacturer's catalog. Proper matching is essential for correct cooperation with the comfort module, central locking controller, and alarm system.

In case of doubt, it is worth consulting a specialized workshop dealing with Audi electronics, which will confirm the possibility of using this element as a donor for parts or in a specific repair scenario.

Expanding the Audi electronics system

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

When deciding to use second-hand electronic components – such as controllers, comfort modules, or sensors – the guide article Second life for electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors? will be helpful, where you will find practical tips on selecting and safely using this type of component.