BMW F01 F02 F04 Footwell Light Module Control Unit ECU FRM III 9203815

Specialist coding required

The item offered is a module that requires coding in the vehicle by a specialist.

The module is not plug&play.

BMW F01 F02 F04 Footwell Light Module Control Unit ECU FRM III is a specialized, factory-original control module for footwell lighting and related comfort functions in BMW 7 Series F01, F02, and F04 generation vehicles. As a component from the Electronic control modules and controllers group, it ensures precise management of lighting signals and communication with other vehicle control units. This solution is designed for users who require compatibility with the factory electrical architecture and stable operation of comfort systems.

Specifications and technical data

• SKU: 9203815
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 9203815
• Substitutable numbers: 9203815, 61359203815, 9225712, 61359225712, 9202327, 61359202327, 9225711, 61359225711, 9199492, 61359199492, 9204377, 61359204377, 9213192, 61359213192, 9210399, 61359210399, 9208270, 61359208270, 9205918, 61359205918
• Category: ECUs & Computer Modules

Purpose and function of the FRM III module

The FRM III module is responsible for controlling footwell lighting and interacting with other body systems, in accordance with the logic specified by the manufacturer, BMW. Its task is to process signals from the electrical installation, sensors, and switches, and transmit them as appropriate commands to the actuators. This ensures that interior lighting and related comfort functions operate consistently with the rest of the vehicle's systems.

Compatibility and integration with BMW electrical systems

The presented controller is designed to work with the electronic platform of BMW F01, F02, and F04 models, allowing for the preservation of the original data bus topology and wiring diagrams. Using a factory module facilitates integration with the existing wiring harness, reduces the need for modifications, and minimizes the risk of communication errors between control units. This is particularly important in premium vehicles, where an extensive network of modules requires full hardware compatibility.

Benefits of using an original BMW module

Using an original module from the Electronic control modules and controllers group allows for maintaining the consistency of the vehicle's configuration with the manufacturer's specifications. This means, among other things, correct operation of comfort functions, predictable lighting performance, and easier diagnostics using factory service software. An OEM used component is also a reasonable compromise between repair costs and maintaining high quality and fitment for a specific equipment version.

Condition, verification, and selection by part numbers

The module is offered as a used original BMW component, which in practice means it comes from disassembly and is intended for reinstallation by the user or a workshop. Before selecting an FRM III controller, it is recommended to verify compatibility by part number and interchangeable numbers to match it to the specific vehicle configuration (model year, equipment version, region). In case of doubt, it is worth consulting the selection with an automotive electrician or using BMW service documentation.

Expanding the electronics system in your BMW

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

More about choosing used electronics

When selecting a used FRM III module, it is worth knowing the basic principles of evaluating electronics, methods of verifying compatibility, and potential programming or adaptation scenarios. Practical tips on purchasing and installing controllers, comfort modules, and other electronic components can be found in the article A second life for electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?, which will help you consciously plan your repair and reduce the risk of incorrect part selection.