BMW 3 Series E87 Max Brose Footwell Light Module Control Unit ECU 9340339

BMW 3 Series E87 Max Brose Footwell Light Module Control Unit ECU is an original component from the Electronic control modules and controllers group, designed to manage the lighting in the vehicle's footwell area. As an OEM component from BMW, it ensures consistency with the vehicle's factory electrical architecture, stable communication with the wiring system, and predictable performance in daily operation.

Specifications and technical data

• SKU: 9340339-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 9340339
• Substitutable numbers: 61359340339, 9340339
• Category: ECUs & Computer Modules

Purpose and function of the module

The presented control unit acts as an electronic management center for the footwell lighting, working in conjunction with the BMW 3 Series interior system. The module is responsible for the correct switching on and off of lights, integration with other comfort systems, and communication with the vehicle's network in accordance with the manufacturer's factory specifications. Thanks to its design compliant with BMW standards, the module maintains proper operating parameters, minimizes the risk of system errors, and preserves the original logic of interior lighting operation, including smooth dimming and brightening, as well as cooperation with other body control units.

Advantages of using an original BMW module

Using a factory controller instead of a damaged component or as part of an interior electrical system repair offers a number of practical benefits:

• maintaining full compatibility with BMW's electrical installation and network architecture,
• consistency with the software of other body control units,
• stable footwell lighting operation without unwanted flickering or dashboard errors,
• possibility of diagnostics and coding using standard BMW service tools. For workshops and users, this means predictable installation, easier configuration, and a reduction in the risk of problems resulting from the use of non-original solutions.

Characteristics of the used component

The module comes from the secondary market and is offered as a used OEM component. Such components are frequently chosen for electrical system repairs because they allow for maintaining the vehicle's original specification while optimizing costs. In the case of control electronics, using a part from the same product family increases the chance of seamless integration with the existing wiring harness and other controllers. Before installation, it is recommended to perform a standard diagnostic procedure and – if necessary – match the configuration to the specific vehicle, in accordance with BMW service practices.

Selection, compatibility, and technical support

To correctly select the module for a specific vehicle, it is crucial to compare factory markings and verify compatibility with the car's equipment. In case of doubt, it is worth using our guide on used automotive electronics, which discusses selection by VIN, hardware and software compatibility, and the most frequently asked questions regarding the installation of controllers – details can be found in the article Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?. For those planning long-term vehicle ownership, maintaining the original equipment specification may also be important, which matters for future resale. The topic of the impact of original used components on vehicle value has been described in more detail in the material Original used parts and resale price – how not to lose money?.

Expanding repairs within BMW electronics

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