BMW F20 F21 F22 F30 X3 F25 M Sport Radio Remote Key Fob Control 868 Mhz 5A57FC8

Used key – requires programming

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

BMW F20 F21 F22 F30 X3 F25 M Sport Radio Remote Key Fob Control is an item from the Electronic control modules and controllers category, designed for the access and ignition system of BMW F-series vehicles. Operating at a frequency of 868 MHz, the remote works with the factory comfort and security electronics, serving as a base for repairing or restoring the functionality of an original key. The product is particularly useful for electronics workshops and specialists involved in programming and adapting BMW keys.

Specifications and technical data

• SKU: 5A57FC8
• Mark: BMW (Genuine OE)
• Condition: For parts or not working
• OEM Part Number: 5A57FC8
• Substitutable numbers: 5A57FC8, 66125A57FC8
• Category: ECUs & Computer Modules

Purpose and function in the vehicle

The presented M Sport key is a component of the remote control and ignition authorization system in selected BMW F-series models, such as the F20, F22, F30, and X3 F25. As an electronic control module, it is responsible for communication with the vehicle, central locking operation, and interaction with the ignition and start system. The remote's design is adapted to BMW's electronic architecture, which allows it to be used as a donor part or a base for advanced repairs.

Technical characteristics of the 868 MHz remote

The key operates at a frequency of 868 MHz, used in European versions of BMW, which is crucial for proper communication with comfort and security modules. The internal electronics are designed as an integrated control module that, after proper preparation and matching, can be used to restore remote control functions in a vehicle. This makes it a valuable component for services specializing in automotive electronics.

Application in diagnostics and repairs

Due to its condition defined as for parts or not working, the key is intended primarily as a source of parts or material for testing and diagnostics. It can be used, among other things, for:

• obtaining electronic components for repairing other remotes,
• analyzing the control circuit during fault diagnostics,
• training workshop tasks in the field of BMW electronics,
• comparative hardware verification during the selection of compatible modules.

For professional services dealing with key and ECU module programming, this is a useful reference material, allowing for a better understanding of the access system structure in BMW F-series models.

Benefits for workshops and electronics technicians

Purchasing such a remote is particularly beneficial for specialists who work with used automotive electronics on a daily basis. The ability to disassemble, analyze, and use selected components allows for lower repair costs while increasing service efficiency. BMW Electronic control modules and controllers of this type are often sought after as donor parts, making this product a valuable addition to workshop inventory.

To better plan the use of used modules and remotes in repairs, it is worth checking out the guide on selecting and installing automotive electronics – this is discussed in detail in the article on used automotive electronics and second-hand ECU modules, where you will find information on compatibility, OEM selection, and practical installation aspects.

Expanding work within BMW electronics

If you are planning a comprehensive repair or upgrade of the control electronics area in your BMW and need other elements from the same group, such as comfort modules, body controllers, or other remotes, check the available parts in the BMW electronic control modules and controllers category.

Summary

BMW F20 F21 F22 F30 X3 F25 M Sport Radio Remote Key Fob Control is a used item intended for service, diagnostic, and component recovery purposes. For professional automotive electronics workshops, it provides a practical source of sub-assemblies and material for analysis, especially when working with access and control systems in BMW F-series vehicles. Due to its compatibility with the electronic architecture of these models, it can effectively support the repair process and optimize service costs.