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 component from the Switches, controls and ignition locks group, designed for advanced comfort and security systems in BMW F-series vehicles. Thanks to its factory design, it ensures consistency with the vehicle's electronics and precise cooperation with the central locking and alarm remote control system. This solution is dedicated to users looking for a compatible component for further diagnostics, repair, or restoring the vehicle's configuration.

Specifications and technical data

• SKU: 8723579-2
• 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

Purpose and function in the vehicle

The presented remote key is an element of the vehicle access and security control system in BMW F-series models with the M Sport package. As part of the electronic system, it is responsible for:

• remote control of door locks and the trunk lid,
• integration with the factory alarm,
• cooperation with comfort modules and the electronic ignition switch.

By operating at a frequency of 868 MHz, the key is adapted to European radio transmission standards, which promotes stable communication with the vehicle and reduces interference under typical operating conditions.

Construction and integration with BMW electronics

The M Sport alarm remote key uses an internal electronic circuit designed to work with factory BMW controllers. The appropriate architecture of the board and components allows for:

• precise coding for a specific vehicle unit,
• support for remote locking and unlocking functions,
• communication with the alarm system and comfort modules.

As an item in the Switches, controls and ignition locks category, the key works with the electronic ignition system, which is important when diagnosing problems with starting, key recognition, or central locking operation.

Service and diagnostic application

Due to the condition being marked as for parts or not working, the product is intended primarily for service, training purposes, or as a donor for components. It can be used, among other things, for:

• obtaining the housing, buttons, or electronic parts to repair another key,
• comparative analysis during the diagnostics of BMW comfort and security systems,
• exercises in key programming and coding in workshop conditions.

This method of use allows for optimizing repair costs while maintaining compliance with the factory system architecture.

Benefits of choosing an original BMW component

Choosing an original BMW alarm remote key brings a number of practical advantages:

• maintaining factory geometry and button ergonomics,
• certainty of compatibility with control modules used in a given generation of vehicles,
• the possibility of using it as a reference when selecting other comfort system components.

For workshops specializing in the BMW brand, such an element is a useful source of parts and material for tests and training, especially in the area of body electronics.

Expanding work within BMW control and security

If you are planning a comprehensive repair or modernization of the control and security zone in your BMW and need other elements from the same group, such as keys, control modules, or electronic ignition locks, check the available parts in the BMW Switches, controls and ignition locks category.

When working with safety and comfort systems, it is also worth ensuring the efficiency of the braking system – practical tips on the safe selection of used components can be found in the article Second-hand braking system: how to safely choose discs, calipers, and ABS?.