BMW 1 3 Series E87 E90 118d 318d M47N2 122HP ECU KIT DDE 7799854 CAS2 + 2 Keys

BMW 1 3 Series E87 E90 118d 318d M47N2 ECU KIT DDE CAS2 + 2 Keys is a practical solution for workshops and users who need a proven engine control package. Thanks to the factory configuration for the BMW 118d / 318d diesel unit and the inclusion of a paired CAS2 module and keys, the set significantly simplifies the process of repairing or replacing engine electronics.

Specifications and technical data

• SKU: 7799854-2
• 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

Application and purpose of the ECU DDE CAS2 kit

The presented set is intended for BMW 1 Series E87 and BMW 3 Series E90 models with the 122HP M47N2 diesel engine. It includes the DDE engine control unit, the CAS2 module, and two keys, which allows for the transfer of the complete start authorization system between vehicles without the need to program the entire system from scratch.

This solution is particularly useful in the event of an original controller failure, CAS–DDE communication issues, or damaged keys. The set allows for the restoration of proper engine operation and the immobilizer system in an organized and technically consistent manner.

Kit construction and installation benefits

The set includes an electronic engine control module (DDE), a comfort/immobilizer module (CAS2), and two keys factory-linked to this set. As a result, you receive a coherent package in which the components are logically tuned for communication within the vehicle's bus.

The most important advantages of this solution are:

• maintaining the integrity of the vehicle's security system,
• reducing the need for deep programming compared to replacing individual modules,
• facilitating diagnostics in case of previous start-up or key authorization problems,
• the possibility of use in vehicles after accident repairs or engine replacement.

For workshops specializing in the BMW brand, such a set provides a convenient base for further vehicle configuration, and for the end user, it means a faster return of the car to full efficiency.

Electronic control modules and BMW controllers – compatibility and selection

As an item from the Electronic control modules and controllers group, the ECU DDE with CAS2 kit requires proper selection based on the engine version and vehicle equipment. In practice, this means it is necessary to verify compatibility by OEM number, interchangeable numbers, and the car's VIN. Proper matching minimizes the risk of CAN network communication errors, start-up problems, or incorrect operation of engine accessories.

To better understand the principles of selecting used controllers and sensors, it is worth using the Global Parts guide – it discusses hardware and software compatibility issues in detail, as well as practical installation examples. More information can be found in the article Used automotive electronics – second-hand ECU modules and sensors.

Condition, verification, and installation recommendations

The offered set comes from dismantling and is intended for re-installation in another vehicle. Before installation, it is recommended to perform a full vehicle diagnostic, check the electrical installation, and verify the current software in the car. Professional installation by a workshop familiar with the specifics of BMW systems allows for reducing adaptation time and avoiding common errors, such as incorrect coding or conflicts with other modules.

For users considering the choice between new and used electronic components, a practical cost-quality guide may also be helpful – you can find it in the material New or used? A comparison of car parts costs and quality, which discusses the differences between new and used OEM components.

Expanding the control system in BMW – related modules

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

Selecting elements from one functional group allows for maintaining the consistency of the vehicle configuration and also facilitates later diagnostics and potential software updates. This is particularly important in modern BMW designs, where many systems are closely integrated with each other.

Summary

BMW 1 3 Series E87 E90 118d 318d M47N2 ECU KIT DDE CAS2 + 2 Keys is a practical, complete engine electronics set designed for specific versions of the 1 and 3 series. Combining the DDE controller, CAS2 module, and two keys in one package facilitates the repair of the start-up and engine control system, shortening workshop time and increasing the predictability of the final result.