BMW E60 LCI E90 M57N2 325d 525d 197HP ECU Kit DME CAS3 + Keys 7809941 Automatic

BMW E60 LCI E90 M57N2 325d 525d 197HP ECU Kit DME CAS3 + Keys is a complete electronic set designed for models with the M57N2 engine and automatic transmission. It includes the DME engine control unit, the CAS3 module, and matched keys, which facilitates a seamless replacement of the factory control system. This solution allows for professional repair of the drivetrain electronics while maintaining the original BMW architecture.

Specifications and technical data

• SKU: 7809941-6
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7809941
• Substitutable numbers: 13618509034, 8509034, 13617811151, 7811151, 13617806380, 7806380, 13617809941, 7809941, 13617806987, 7806987, 13617806152, 7806152, 13618506951, 8506951, 13617805288, 7805288, 13617808314, 7808314, 13617804845, 7804845, 0281015130, 0 281 015 130, 61359147196, 9147196
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Purpose and function of the ECU kit

The presented control set is dedicated to the BMW 3 Series E90 and 5 Series E60 LCI with the M57N2 unit in 325d and 525d versions. The set includes cooperating control elements, which allows for maintaining the consistency of the immobilizer system, engine management, and communication with other vehicle modules. Thanks to this, it provides a solid foundation for restoring the proper operation of the drivetrain after a failure of the original controller.

Construction of the DME CAS3 + Keys set

The kit consists of the DME engine controller responsible for managing the M57N2 unit, the CAS3 module handling start authorization, and keys matched to this set. Such a configuration minimizes the risk of synchronization problems between modules and facilitates the adaptation process in the vehicle. The use of original BMW components promotes stable communication on the vehicle bus and proper cooperation with other comfort and safety modules.

Compatibility with automatic transmission

The set has been prepared for automatic transmission, which is crucial for the proper cooperation of the engine controller with the transmission control module. Appropriate software and configuration allow for the correct exchange of data regarding torque, gear shifting strategies, and protective functions. This makes it possible to maintain smooth operation of the drivetrain without unwanted errors related to communication between controllers.

Professional application and OEM selection

This set from the Electronic control modules and controllers category is particularly recommended for workshops specializing in BMW electronics and users who want to perform repairs based on original solutions. Selection by OEM number and interchangeable numbers allows for precise verification of compatibility with a specific vehicle configuration, which limits the risk of hardware or software incompatibility. The used nature of the set allows for cost optimization of the repair while maintaining factory control logic.

Condition, verification, and installation recommendations

The set comes from a used vehicle, which is a typical solution in the case of advanced control electronics in premium cars. Before installation, it is recommended to perform diagnostics and adaptation using appropriate service software to match the configuration to the specific car. Professional installation and correct coding allow for fully utilizing the potential of the set and restoring stable operation of the drivetrain.

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

To better plan the purchase and installation of a used ECU set, it is worth familiarizing yourself with practical tips regarding selection by OEM number, hardware compatibility, and installation procedures, which you will find in the guide Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?.