BMW 1 3 Series E87 E90 M47N2 118d 318d 122HP ECU KIT DDE + CAS2 + Key 7799854

BMW 1 3 Series E87 E90 M47N2 118d 318d 122HP ECU KIT DDE + CAS2 + Key is a complete, used electronic set designed for the powertrain of selected BMW models with the M47N2 engine. The set includes the DDE engine control unit along with the CAS2 module and a matched key, which facilitates the restoration of proper engine electronics operation after a failure or during an engine replacement. It is a practical solution for workshops and users looking for a proven, factory-spec control set.

Specifications and technical data

• SKU: 7799854-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7799854
• Substitutable numbers: 13617808124 0281012880 61356981416, 7808124 0 281 012 880 6981416, 13617799854 13617798179 13617801710, 13617797216 13617803372 13617797496, 13617795844, 7799854, 7798179 7801710 7797216, 7803372 7797496 7795844
• Category: ECUs & Computer Modules

Purpose and function of the set

The presented DDE set with CAS2 and key is dedicated to BMW vehicles with the 122HP M47N2 diesel engine, used in models such as the E87 and E90 series in 118d and 318d versions. The set is responsible for comprehensive engine management, communication with the immobilizer, and start authorization, ensuring consistency between the ECU, the security module, and the key. Thanks to the completeness of the components, it is possible to reduce issues with matching electronics to a specific vehicle, which in practice shortens the time required for diagnostics and configuration after installation.

Construction and key components

The offered solution consists of three main elements from the Electronic control modules and ECUs category:

• DDE engine control unit responsible for managing injection, turbocharging, and engine protection,
• CAS2 module acting as an electronic access and start authorization system,
• key that works with the CAS2 module, enabling the vehicle to be started correctly. Combining these elements into one set makes it easier to maintain software and coding compatibility between the engine control unit and the vehicle's security system. For a workshop, this means a lower risk of bus communication conflicts and more stable operation of the entire system.

Benefits of using a used DDE CAS2 set with key

Choosing a complete, used engine control set with a CAS2 module and key is often a cost-effective solution for major electronic faults. Instead of selecting each element separately, you receive a pre-tuned package that, after proper installation and adaptation, can significantly simplify the repair process. This is particularly important for cars with complex electronics, where component compatibility has a direct impact on engine stability. The used condition allows for lower repair costs compared to new components, while maintaining the factory design and system logic. For many users and service centers, this is a reasonable compromise between price and functionality.

Selection by part numbers and compatibility

The offered set has an assigned OEM part number and associated interchangeable numbers, which allows for precise verification of compatibility with a specific vehicle version. Before purchasing, it is recommended to compare the markings with data from the original control unit or service documentation to confirm compatibility with the given engine configuration and electrical system. This helps reduce the risk of communication problems in the vehicle network, engine operation errors, or the need for additional installation modifications.

Technical support and additional information

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other elements from the same group, such as additional controllers, management modules, or auxiliary systems, check out the available parts in the BMW electronic control modules and ECUs category. Before deciding to install a used engine control unit or security module, it is worth reading practical tips on selecting and diagnosing such elements – the article Second life for electronics – when is it worth choosing used engine ECUs, comfort modules, and parking sensors? will be helpful, where you will find advice on assessing the condition of electronics and the principles of safe installation.

Summary

BMW 1 3 Series E87 E90 M47N2 118d 318d 122HP ECU KIT DDE + CAS2 + Key is a practical choice for those looking for a complete, factory-spec solution to restore the efficiency of the engine control system in selected BMW models. After proper verification of compatibility and professional installation, the set can significantly facilitate repairs, reduce vehicle downtime, and ensure consistent cooperation between the powertrain electronics and the security system.