BMW E87 E90 E91 118d 318d M47N2 122HP Engine ECU Kit DDE 7795844 CAS2 + Key

BMW E87 E90 E91 118d 318d M47N2 122HP Engine ECU Kit DDE CAS2 + Key is a complete engine control kit designed for selected BMW 1 and 3 Series models with the M47N2 unit. It includes a DDE engine control unit, a CAS2 module, and a matched key, which facilitates restoring the drivetrain's functionality after an electronics failure. It is a practical solution for workshops and users looking for a consistent, factory-spec control set.

Specifications and technical data

• SKU: 7795844-2
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7795844
• Substitutable numbers: 13617808124, 7808124, 13617803372, 7803372, 13617801710, 7801710, 13617799854, 7799854, 13617798179, 7798179, 13617797496, 7797496, 13617797216, 7797216, 13617795844, 7795844, 61356943757 6943757, 0281011631, 0 281 011 631
• Category: Control Modules

Purpose and function of the ECU DDE CAS2 + key kit

The presented kit belongs to the Computers and Controllers category and is dedicated to BMW vehicles with the 122 HP M47N2 diesel engine, used in models such as the 118d and 318d of the E87, E90, and E91 generations. The kit includes the DDE engine controller responsible for precise management of injection, turbocharging, and engine protection, the CAS2 module handling start authorization, and a matched key, ensuring the consistency of the immobilizer system.

This combination of components allows for the efficient restoration of the original engine control logic and security features without the need for time-consuming matching of individual modules.

Benefits of using a complete engine control unit kit

Using a complete ECU DDE kit with the CAS2 module and key provides a number of practical benefits in the repair process:

• consistency of the electronics responsible for starting and engine operation,
• reduction of issues with immobilizer matching and module synchronization,
• easier diagnostics and programming compared to replacing individual components,
• possibility to restore the factory operating parameters of the M47N2 unit.

For workshops specializing in the BMW brand, such a kit serves as a convenient base for further configuration, coding, and adaptation to a specific vehicle.

Product characteristics and condition

The offered kit comes from the BMW line and is part of the original electronic architecture of these models. As a used part, it represents an attractive cost alternative to new components while maintaining the factory design and purpose. The kit is particularly useful in situations where the engine controller has been damaged, there are issues with the CAS2 module, or a properly functioning key has been lost.

Before installation, it is recommended to perform standard diagnostic procedures and adjust the configuration to the specific car, in accordance with BMW service practices and the capabilities of your workshop software.

Installation tips and practical service application

Replacing the ECU DDE kit with CAS2 and key requires basic knowledge of BMW electronic systems and access to appropriate diagnostic tools. In service practice, the process usually involves:

• physically installing the engine controller in the engine bay in place of the damaged one,
• replacing the CAS2 module in the vehicle cabin,
• using the included key as a component compatible with the new CAS2 module,
• performing adaptation and control procedures using diagnostic testers.

This approach allows for reducing vehicle downtime and minimizing the risk of incompatibility between individual security and engine control system modules.

Expanding knowledge about used BMW electronics

If you want to better understand when choosing a used engine controller or comfort module is justified, how to assess risks, and what to look for when selecting components, it is worth checking out our guide: The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?.

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, engine management modules, or parameter control systems, check out the available parts in the BMW Computers and Controllers category.