BMW F20 F21 F22 F30 F31 M Sport Radio Remote Alarm Key Button 868 MHz 8723579

Used key – requires programming

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

BMW F20 F21 F22 F30 F31 M Sport Radio Remote Alarm Key Button is an original item from the Switches, control elements and ignition locks group, designed for the remote central locking and alarm system in selected BMW F-series models. The product is offered in for parts or not working condition, making it a good source for a donor housing, electronics, or individual components for specialized repairs.

Specifications and technical data

• SKU: 8723579
• Mark: BMW (Genuine OE)
• Condition: For parts or not working
• OEM Part Number: 8723579
• Substitutable numbers: 8723579, 66128723579, 8053870, 66128053870, 2230337, 66122230337
• Category: Switches & Controls

Application and vehicle function

The presented radio key operates on the 868 MHz frequency band, used in modern BMW remote control systems. It is responsible for handling functions such as:

• remote vehicle locking and unlocking,
• factory alarm control,
• integration with vehicle comfort and security modules.

Thanks to its design compliant with factory BMW standards, this item can serve as a base for repairing or reconstructing a key in F-series models that utilize similar electronic architecture.

Technical characteristics and construction

The key belongs to the Switches, control elements and ignition locks group, meaning it is part of the vehicle's control system rather than just a simple remote. Its construction includes, among others:

• an electronic circuit board responsible for radio communication with the vehicle,
• a set of buttons controlling lock and alarm functions,
• a housing adapted for daily use in automotive conditions.

This type of item is often used by automotive electronics specialists as a donor for repairing damaged remotes, programming replacement keys, or restoring functionality after the loss of the original set.

Product condition and potential service applications

The offered key is sold in for parts or not working condition, which means it is not intended for direct, plug-and-play installation. However, it can be a valuable source of:

• a housing for transferring functional electronics,
• individual electronic components for repair,
• training material for testing and diagnostics in workshops specializing in BMW electronics.

This approach allows for the optimization of service costs, especially in the case of more complex repairs where a new, complete key would not be economically justified.

Selection and compatibility in the BMW F series

Due to its belonging to the BMW F-series family, the key is particularly interesting for workshops and users working on F20, F21, F22, F30, and F31 models. When selecting and adapting such an item, it is crucial to pay attention to:

• the frequency compatibility of the radio system,
• the vehicle's electronic architecture,
• programming and coding procedures used in the specific model.

In practice, this product is most often used by specialists dealing with key programming, comfort module diagnostics, and security system repairs in BMW vehicles.

If you are planning a comprehensive repair or upgrade of the control and security area in your BMW and need other items from the same group, such as buttons, control modules, or ignition locks, check the available parts in the BMW Switches, control elements and ignition locks category.

Substantive support and cost optimization

When working with used electronic components, it is worth knowing the best practices for selecting and verifying parts to maintain a balance between cost and system reliability. In the context of optimizing your service budget and consciously using dismantled parts, the article on our blog may be helpful: Used parts for Mercedes - original parts from dismantling, which discusses the general principles of safe use of original components from the secondary market.