BMW E90 330d M57N2 231HP Engine ECU KIT DDE 7810950 CAS3 Key Manual

BMW E90 330d M57N2 231HP Engine ECU KIT DDE CAS3 Key Manual is a complete engine control set for the 231 HP M57N2 unit, designed for BMW 3 Series E90 models with a manual transmission. The set includes the DDE engine control unit, the CAS3 module, and a matched key, which facilitates the restoration of full drivetrain functionality after an electronics failure. This solution allows for a consistent, technically correct replacement of control components without the need for tedious matching of individual parts.

Specifications and technical data

• SKU: 7810950-6
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7810950
• Substitutable numbers: 13617810950, 7810950, 13617806378, 7806378, 13617810077, 7810077, 13617806976, 7806976, 13617809944, 7809944, 13617808205, 7808205, 13617811957, 7811957, 13617809784, 7809784, 13618509035, 8509035, 13617823799, 7823799, 0281015240, 0 281 015 240, 61359147220, 9147220
• Gearbox type: Manual
• Category: ECUs & Computer Modules

Purpose and function of the ECU kit

The presented engine control unit set is dedicated to BMW vehicles with the 231 HP M57N2 diesel engine, equipped with a manual transmission. The set includes the DDE electronic control module responsible for precise management of the engine's operation, the CAS3 module that handles start authorization functions, and a key that works with this system.

A set configured in this way is particularly useful in situations where the original controller has been damaged, or there are issues with the immobilizer or incompatibility between modules in the vehicle. Using a single, consistent set minimizes the risk of software conflicts and speeds up the process of getting the car running after repairs.

Benefits of using a complete DDE + CAS3 + key set

The ECU set with the CAS3 module and key provides a number of practical advantages compared to replacing individual components:

• consistency of the electronics responsible for starting and engine control,
• reduction of the need for advanced programming and adaptation,
• easier diagnostics of potential faults after installation,
• maintaining correct cooperation between the engine controller and the vehicle's security system.

Thanks to this, the complete ECU kit is often chosen for more serious electronics failures, when repairing or cloning a damaged controller is uneconomical or technically difficult.

Application in BMW drivetrain with manual transmission

The discussed set has been prepared for BMW vehicles that use a manual transmission. This is important both for the engine controller software and for the logic of interaction with other modules in the vehicle. Selecting an ECU for a specific type of transmission is crucial for the proper operation of functions such as torque control, throttle response, or cooperation with driver assistance systems.

Before installation, it is recommended to verify the compatibility of the set with the specific vehicle equipment version and consult with a workshop specializing in BMW electronics to ensure proper configuration and avoid communication issues on the vehicle bus.

Product characteristics and condition

The product belongs to the Electronic control modules and controllers category, which means it plays a key role in managing engine operation and start authorization. The set is used, which in workshop practice often represents a reasonable compromise between repair cost and functionality, especially in the case of older vehicle generations.

When installing a used ECU set, it is important to perform standard diagnostic procedures after installation, such as reading error codes, checking live parameters, and verifying the correctness of communication with other modules in the vehicle. This allows you to confirm that the engine control system is working stably and in accordance with the manufacturer's specifications.

Technical support and selection of BMW electronics

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 engine controllers, comfort modules, or transmission controllers, check out the available parts in the BMW electronic control modules and controllers category.

When choosing a used ECU set, it is worth using reliable advice on electronics selection, compatibility, and installation procedures – you can find practical tips in the article "The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?", which discusses the most important aspects of working with used electronic modules in vehicles.