BMW F11 LCI Light Control Footwell Module ECU Unit FRM3 9345374

BMW F11 LCI Light Control Footwell Module ECU Unit FRM3 is a specialized component from the Electronic control modules and controllers category, responsible for advanced lighting management in the vehicle. The offered unit is an original BMW component, which ensures proper integration with the electrical system and comfort systems in 5 Series models after the facelift (LCI).

Specifications and technical data

• SKU: 9345374-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 9345374
• Substitutable numbers: 61359345374, 9345374, 6992947, 9236461, 6992954, 9313933, 9345371, 9236458, 6823590, 9251976, 9290013
• Category: ECUs & Computer Modules

Purpose and function of the FRM3 module

The FRM3 light module in the BMW F11 LCI is responsible for controlling numerous exterior and interior lighting functions, working in conjunction with the body wiring and safety systems. As a component in the Electronic control modules and controllers category, it integrates signals from switches, sensors, and data buses, and then transmits the appropriate commands to individual lighting circuits.

Thanks to its factory architecture, the module maintains compatibility with the logic of BMW systems, which is essential for features such as automatic headlights, daytime running lights, interior lighting control, and bulb failure signaling.

Benefits of using an original BMW controller

Using an original light controller in the BMW F11 LCI allows for maintaining consistency in electrical and software parameters with the rest of the vehicle's installation. In practice, this translates into:

• stable operation of the lighting system without unwanted error messages,
• proper cooperation with factory comfort and safety features,
• compliance with BMW service documentation and diagnostic procedures.

For workshops and users, this means easier diagnostics, predictable system behavior, and the ability to use standard coding and adaptation procedures as part of body electronics maintenance.

Unit characteristics and service application

The offered module belongs to the group of used OEM BMW components, making it an attractive service solution in the event of a factory controller failure in the vehicle. Replacing it with an original element from the same family helps reduce repair costs while maintaining proper build quality and compatibility with the installation.

The module can be used both for standard replacement of a damaged controller and in situations where it is necessary to repair the lighting system after flooding, short circuits, or other electrical damage. In such cases, correct matching on the hardware and software side is important, which is facilitated by identification via the OEM part number and interchangeable numbers available in the specification.

Installation and diagnostic tips

When installing the FRM3 module in the BMW F11 LCI, it is recommended to:

• perform an initial diagnostic of the electrical system to rule out secondary damage,
• apply coding and adaptation procedures in accordance with BMW guidelines,
• check the vehicle's equipment configuration for compatibility with the used controller.

The selection of the appropriate module should be based on the OEM part number and reference numbers, which minimizes the risk of hardware or software incompatibility. A properly selected and configured controller allows for restoring full functionality of the lighting system without the need for wiring interference or additional modifications.

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

Choosing a used module and expert knowledge

When choosing a used light controller, it is crucial to pay attention to the compatibility of markings, hardware and software versions, and vehicle equipment. Proper selection helps avoid problems with bus communication, errors in the controller's memory, or limited lighting functionality.

To better understand how to safely choose used electronic modules and what to look for when matching by OEM number, interchangeable numbers, and vehicle configuration, it is worth checking out our guide: Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?.