BMW F20 F21 LCI F22 M140i M240i B58 340HP Engine ECU KIT DME 8740344 FEM + Key

BMW F20 F21 LCI F22 M140i M240i B58 340HP Engine ECU KIT DME FEM + Key for BMW F20 F21 LCI F22 M140i M240i models with the 340HP B58 unit is a solution designed for professional workshops and advanced BMW enthusiasts. This used set from the Electronic control modules and ECUs category allows for a technically correct replacement of the factory engine management system in F-Series vehicles.

Specifications and technical data

• SKU: 8740344-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8740344
• Substitutable numbers: 8740344, 12148489450, 8489450, 0261S19973, 0 261 S19 973, 61358707674, 8707674, KZ
• Category: ECUs & Computer Modules

Purpose and compatibility

The BMW F20 F21 LCI F22 M140i M240i B58 340HP Engine ECU KIT DME FEM + Key is dedicated to F-generation BMW 1 and 2 series cars with the 340HP B58 engine, particularly the facelifted (LCI) M140i and M240i versions. The design of the set allows for maintaining consistency between the engine control unit, the FEM body module, and the key transponder, which is crucial for the proper operation of the immobilizer system and the vehicle's advanced electronic functions.

Construction of the BMW F20 F21 LCI F22 M140i M240i B58 340HP Engine ECU KIT DME FEM + Key

The offered set includes an electronic DME engine control unit, an FEM body module responsible for managing numerous comfort and safety functions, and a matched vehicle key. This configuration creates a coherent, factory-tuned set that minimizes the risk of software conflicts and facilitates the adaptation process in the donor vehicle. Thanks to this solution, it is possible to restore the original operating logic of the powertrain and associated electronic systems.

Application in diagnostics, repair, and upgrades

This engine control unit set is used both for repairs following electronic failures and for more advanced upgrade projects. It can be used, among other things, for:

• restoring a functional engine control system after a factory DME failure,
• swapping the 340HP B58 powertrain into another F-Series body,
• diagnostic work requiring a complete, compatible set of control units,
• modification projects where maintaining the original BMW electronic architecture is necessary.

By maintaining consistency between the ECU, FEM module, and key, the set provides a solid foundation for further software configuration in specialized service centers.

Benefits of using an original BMW module

The offered set comes from the BMW production line, which means full compatibility with the vehicle's electrical and communication architecture. Original electronic control modules ensure proper cooperation with the CAN bus, safety systems, and factory comfort functions. For workshops, this means fewer issues during coding and programming, and for the end user – stable powertrain operation and predictable vehicle behavior under various operating conditions.

Condition, verification, and practical aspects

The item is offered as used, which in practice allows for a favorable cost-to-functionality ratio while maintaining the original BMW specification. Before installation, it is recommended to perform a full diagnostic and prepare the vehicle in terms of equipment compatibility so that the adaptation process proceeds as smoothly as possible. Professional installation and proper coding are crucial for the set to work correctly with the vehicle's other 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 control systems, check the available parts in the BMW electronic control modules and ECUs category.

Technical support and selection of used modules

When working with BMW electronics, it is worth using reliable sources of knowledge regarding engine control units, comfort modules, and multimedia systems. Practical tips on repairing the engine control unit, FRM modules, or the iDrive system using dismantled parts can be found in the article Driving pleasure for years – how to take care of iDrive systems and electronic modules in BMW 3 and 5 series models using dismantled parts?. This is a valuable supplement to your knowledge when planning work with advanced BMW electronics.