BMW 1 3 E87 E90 E91 118d 318d M47N2 122HP Engine ECU Kit DDE 7797216 CAS2 Keys

BMW 1 3 E87 E90 E91 118d 318d M47N2 122HP Engine ECU Kit DDE CAS2 Keys is a complete engine control kit for the 122 HP M47N2 unit, including the DDE module, CAS2 module, and matched keys. This package allows for a coherent, technically correct replacement of engine control electronics while maintaining the integrity of the immobilizer system and ensuring comfortable vehicle starting. This solution is particularly useful for major repairs or when replacing a damaged ECU in BMW 1 and 3 Series models.

Specifications and technical data

• SKU: 7797216-3
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7797216
• Substitutable numbers: 13617808124, 7808124, 13617803372, 7803372, 13617801710, 7801710, 13617799854, 7799854, 13617798179, 7798179, 13617797496, 7797496, 13617797216, 7797216, 13617795844, 7795844, Control Unit, 0281011964, 0 281 011 964, 61356964051, 6964051
• Category: ECUs & Computer Modules

Application and function of the ECU DDE with CAS2 kit

The presented kit is designed for BMW 1 Series E87 and 3 Series E90/E91 vehicles equipped with the 122 HP M47N2 diesel engine. The set includes an electronic engine control unit (DDE), a CAS2 module responsible for start authorization, and keys matched to this system. As a result, the user receives a consistent system that, after proper adaptation, can replace a damaged factory set.

A kit configured in this way ensures compatibility between the engine controller, immobilizer, and keys, which is crucial for the correct starting of the powertrain and the stable operation of all related electronic systems.

Benefits of using a complete DDE + CAS2 + keys kit

Using a complete control kit offers a number of practical advantages in the repair process:

• consistency of engine electronics and security – DDE, CAS2, and keys come from a single system, which facilitates configuration,
• reduction of issues with immobilizer matching and key synchronization,
• possibility to restore the correct operation of the M47N2 unit after a failure of the original controller,
• more predictable diagnostics and programming process compared to replacing individual modules.

For workshops specializing in the BMW brand, such a kit is a convenient service solution, allowing for shorter repair times and reducing the risk of software or hardware incompatibility.

Category characteristics: Electronic control modules and controllers

The product belongs to the Electronic control modules and controllers category, which includes components responsible for advanced management of vehicle sub-assemblies. In the case of the DDE unit, the controller analyzes signals from sensors, manages fuel dosage and injection timing, and cooperates with other onboard systems. The CAS2 module is responsible for key authorization, communication with the immobilizer, and transmitting the start signal to the engine controller.

In practice, this means that a correctly selected and configured ECU kit has a direct impact on engine performance, starting stability, throttle response, and cooperation with other electronic systems in the vehicle.

Condition, selection, and installation aspects

The offered kit comes from the BMW group and is a used item, which in the case of control electronics often represents a reasonable compromise between cost and functionality. Before installation, it is recommended to verify compatibility with the specific vehicle configuration, particularly regarding the engine version, model year, and equipment.

Professional installation should include:

• diagnostics of the existing electronic system in the vehicle,
• correct connection of the DDE + CAS2 + keys kit,
• potential coding and adaptation using appropriate service software,
• start test and error memory check in the controller.

This approach minimizes the risk of engine starting problems and ensures the stable operation of the entire powertrain.

Technical support and selection by OEM/VIN

When selecting used ECU modules and related controllers, it is particularly important to pay attention to the compatibility of hardware and software markings as well as matching the specific VIN. To better understand the principles of safely choosing electronics from the secondary market, it is worth reading the Global Parts guide: Used automotive electronics on board – why is it worth choosing second-hand ECU modules and 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 engine controllers, comfort modules, or CAS systems, check out the available parts in the BMW electronic control modules and controllers category.