BMW E90 E91 E92 330d M57N2 231HP Engine ECU KIT DDE 7809944 CAS + Key Automatic

BMW E90 E91 E92 330d M57N2 231HP Engine ECU KIT DDE CAS + Key Automatic is a practical solution for workshops and users who need a functional engine electronics package for versions with an automatic transmission. The set includes all key components necessary for the operation of the engine control system, which facilitates diagnostics, replacement, and restoring full vehicle functionality. By maintaining component consistency, it ensures stable cooperation between the ECU, CAS module, and key.

Specifications and technical data

• SKU: 7809944-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7809944
• Substitutable numbers: 13617810950, 7810950, 13617806378 13617810077 13617806976, 7806378 7810077 7806976, 13617809944 13617808205 13617811957, 7809944 7808205 7811957, 13617809784, 7809784, 0281015129, 0 281 015 129, 61359217853, 9217853
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Purpose and function of the BMW E90 E91 E92 330d M57N2 231HP Engine ECU KIT DDE CAS + Key Automatic

The presented set is dedicated to the BMW 330d M57N2 diesel engine in E90, E91, and E92 body styles, in a configuration with an automatic transmission. The set includes the electronic DDE engine control module, the CAS module responsible for ignition authorization, and a matched key, which allows for maintaining the consistency of the immobilizer and powertrain control system.

A package configured in this way from the Electronic control modules and ECUs group allows for the restoration of the original engine operating logic, including injection control, engine operating parameters, and communication with other vehicle systems.

Benefits of using a complete BMW E90 E91 E92 330d M57N2 231HP Engine ECU KIT DDE CAS + Key Automatic

Using a complete ECU set with a CAS module and key in a BMW 3 Series 330d M57N2 brings a number of practical service benefits:

• maintaining compatibility between the engine controller and the immobilizer system,
• reducing the need for programming the entire system from scratch,
• facilitating adaptation in a vehicle equipped with an automatic transmission,
• consistent communication with other comfort and safety modules.

For workshops, this means shorter diagnostic and installation times, and for the user – a faster return of the vehicle to full efficiency. The complete engine electronics package is particularly useful for major controller failures or problems with CAS–DDE synchronization.

Technical characteristics and compatibility

The offered set belongs to the group of original BMW solutions in the field of engine control. It has been designed to work with the M57N2 unit in the 330d version and with an automatic transmission, which is important for the proper handling of functions such as torque management, cooperation with the gear shifting system, or traction control.

The product specification includes the OEM part number and related interchangeable numbers, which facilitates precise matching by VIN or catalog numbers. This allows for verifying compatibility with a specific vehicle configuration, minimizing the risk of incorrect controller selection.

Condition, verification, and service application

The elements included in the set come from the secondary market, which allows for significantly reducing repair costs compared to new OEM components, while maintaining proper functionality. This type of solution is particularly beneficial for repairs of intensively used vehicles, where a reasonable balance between price and quality counts.

Before installation, a standard diagnostic procedure and verification of compatibility with the specific vehicle equipment version are recommended. In many cases, this type of set allows for efficiently restoring the operation of the ignition and engine control system without the need for deep software intervention, which is important for both independent workshops and individual users.

Substantive support and selection of used electronics

If you want to better understand how to safely select used engine controllers, CAS modules, and other vehicle electronics, it is worth using a guide describing selection by VIN, OEM numbers, and installation rules. Detailed information can be found in the article Used car electronics on board – why is it worth choosing second-hand ECU modules and sensors?, which discusses the practical aspects of working with such components.

If you are planning a comprehensive repair or modernization of the engine area in your BMW and need other elements from the same group, such as controllers, engine management modules, or parameter control systems, check the available parts in the BMW electronic control modules and ECUs category.