BMW F20 LCI F21 F30 F31 F32 Radio Remote Control Key Fob 434MHz 5A57FC1

BMW F20 LCI F21 F30 F31 F32 Radio Remote Control Key Fob is an original component from the Electronic control modules and controllers group, designed for remote operation of the central locking system and convenience functions in selected BMW F-series models. This used, factory-original remote ensures proper cooperation with the vehicle's electronics while maintaining compatibility with safety and comfort system architectures.

Specifications and technical data

• SKU: 5A57FC1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 5A57FC1
• Substitutable numbers: 66125A57FC1, 5A57FC1, 66125A407E7, 5A407E7, 66128723606, 8723606, 66129312531, 9312531
• Category: ECUs & Computer Modules

Purpose and function of the key fob

The presented remote control key fob, operating at a frequency of 434 MHz, is a component of the remote control system in BMW F-series cars, such as the F20 LCI, F21, F30, F31, or F32. As an electronic part, it is responsible for wireless communication with body control modules, enabling convenient locking and unlocking of the vehicle as well as the operation of functions provided by the car's specific configuration. The original remote from this series is designed for stable operation in electromagnetic interference environments, which translates into consistent performance under typical operating conditions. Using the correct key fob is essential for proper cooperation with factory controllers and maintaining the integrity of the security system.

Electronic construction and vehicle integration

The key fob belongs to the Electronic control modules and controllers group, which means that inside the housing there is an electronic circuit responsible for generating the radio signal and communicating with the vehicle. The design is prepared for cooperation with factory BMW controllers, allowing for integration with the existing installation after proper programming. In practice, this means that:

• the remote works with the central locking and convenience system intended for the given generation of the BMW F-series,
• communication takes place on the dedicated radio frequency used in these models,
• the electronic module is adapted for coding in accordance with the manufacturer's factory standards. Thanks to this, the key fob can be used as a replacement for a damaged remote or as an additional unit after being properly matched to a specific car.

Product condition and service application

The offered item is in used condition, which in practice means that it comes from a previously operated vehicle and may show signs of normal wear. For workshops, independent service centers, and individual users, this represents a cost-effective solution while maintaining the manufacturer's original specifications. A key fob of this type is particularly useful in situations where:

• the existing remote has suffered mechanical or electronic damage,
• it is necessary to prepare an additional key fob for the vehicle,
• the priority is to maintain original BMW electronics instead of using universal replacements. Due to the nature of electronic parts, it is recommended to verify compatibility with the specific equipment version and vehicle production year before installation and programming.

Benefits of choosing an original BMW remote

Choosing an original remote from this series allows you to maintain the consistency of the electronic system in the car. The factory design is engineered for cooperation with specific controllers, which reduces the risk of issues with range, connection stability, or improper operation of convenience functions. Additionally, using a used but original component from the Electronic control modules and controllers group is often more cost-effective than purchasing a new remote, while maintaining compliance with the manufacturer's requirements. This is a solution that works well both in professional service centers and for conscious, budget-friendly vehicle repairs. If you are planning a comprehensive repair or upgrade of the electronic zone in your BMW and need other components from the same group, such as body controllers, comfort modules, or other remote controls, check the available parts in the BMW Electronic control modules and controllers category.

More about used automotive electronics

When selecting a used remote and other electronic components, it is worth knowing the basic principles of assessing condition and compatibility to avoid problems during programming and operation. Practical tips regarding the selection of controllers, comfort modules, and parking sensors can be found in the article The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?, which helps you take a conscious approach to purchasing used electronic components.