BMW F20 F21 LCI 118i B38 136HP Engine ECU Kit DME 9424338 FEM Key Automatic

BMW F20 F21 LCI 118i B38 136HP Engine ECU Kit DME FEM Key Automatic is a coherent engine electronics set designed for petrol vehicles. Thanks to the factory configuration for a specific powertrain and automatic transmission, it serves as a practical service solution when replacing a damaged ECU or the entire vehicle start system.

Specifications and technical data

• SKU: 9424338-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 9424338
• Substitutable numbers: 12148486839, 8486839, 12148674265, 8674265, 12148648362, 8648362, 12148654454, 8654454, 9424338, 0261S20781, 0 261 S20 781, 358709215, 8709215, KZ
• Fuel type: Petrol
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Application and compatibility

The presented set is intended for BMW 1 Series F20/F21 LCI (facelift) models in the 118i version with the 136 HP B38 petrol engine, equipped with an automatic transmission. The combination of the DME engine control unit, FEM module, and key allows for maintaining the consistency of the immobilizer, coding, and powertrain operating parameters, which facilitates adaptation in a vehicle with a matching configuration.

Electronics from this group require professional diagnostics and matching to a specific VIN number; therefore, installation in a specialized service center that will verify hardware and software compatibility with the given vehicle is recommended.

Technical characteristics of the ECU DME / FEM / key set

The set includes a DME family engine control unit, a FEM body module, and a key, which allows for maintaining the integrity of the security system and starting logic. The set is prepared to work with the B38 petrol unit and an automatic transmission, ensuring that engine operating parameters, gear shifting strategies, and starting functions are synchronized.

The presence of related replacement numbers in the technical specification facilitates the selection of the appropriate controller variant for a specific equipment version. This is particularly important in modern BMWs, where differences in software and configuration can affect compatibility with the vehicle's electrical system.

Benefits of using a used ECU set in a BMW

Choosing a used engine control unit set with a FEM module and key allows for significantly reducing repair costs compared to purchasing new components, while maintaining the original BMW electronics architecture. A set sourced from a single vehicle minimizes the risk of conflicts in the immobilizer system and issues with key authorization.

Such a solution is particularly beneficial in the event of a controller failure, FEM module damage, or starting problems, where simultaneous intervention in several system elements is required. A coherent ECU set with a key reduces diagnostic time and accelerates the process of restoring full vehicle functionality.

To better understand the specifics of installing and selecting used electronic modules, it is worth reading the guide on second-hand electronics: Used automotive electronics – second-hand ECU modules and sensors.

Professional installation and selection by part numbers

Due to the complexity of control systems in modern BMWs, the installation of such a set should be preceded by verification of compatibility based on part numbers and vehicle configuration. A workshop equipped with appropriate diagnostic software is able to check whether a given ECU DME / FEM / key set will work correctly with the electrical installation, comfort equipment, and safety systems.

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other components from the same group, such as controllers, management modules, or ECU units, check the available parts in the BMW electronic control modules and controllers category.