BMW 1 3 Series E87 E90 E91 118d 318d M47N2 Engine ECU Kit DDE 7797216 CAS3 Key

BMW 1 3 Series E87 E90 E91 118d 318d M47N2 Engine ECU Kit DDE CAS3 Key is a complete engine control set designed for selected BMW 1 and 3 Series models with the M47N2 unit. The set includes the DDE engine control module, CAS3 module, and a matched key, which facilitates professional control system replacement without the need for tedious programming from scratch. This solution is particularly useful in the event of a controller failure or immobilizer issues.

Specifications and technical data

• SKU: 7797216-1
• 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, 0281011964, 0 281 011 964, 61356964051, 6964051
• Category: ECUs & Computer Modules

Application and function of the ECU DDE + CAS3 + key set

The presented set is an item from the Electronic control modules and controllers category, responsible for managing the operation of the M47N2 diesel engine in BMW 1 Series E87 and 3 Series E90/E91 models in 118d and 318d versions. Combining the DDE controller with the CAS3 module and a paired key ensures the integrity of the security system, correct start authorization, and stable communication with other modules in the vehicle.

A set configured in this way is particularly useful in situations where the engine controller has been damaged, or there are issues with immobilizer synchronization or failed programming attempts. Using a ready-made set minimizes the risk of software conflicts and reduces the time required to restore full vehicle functionality.

Benefits of using an original BMW set

The ECU DDE set with the CAS3 module and key comes from the BMW line, which means it is factory-matched to the electrical architecture and communication buses of vehicles from this brand. Original electronics ensure:

• compatibility with the factory configuration of the M47N2 engine in 118d and 318d versions,
• proper cooperation with the immobilizer system and comfort modules,
• stable communication with the CAN network and other controllers in the vehicle,
• the possibility of further diagnostics and adaptation using standard BMW service tools.

Thanks to this, the set is a practical solution both for workshops specializing in BMW electronics and for advanced users servicing their cars themselves. The completeness of the set limits the number of potential problem areas during installation and configuration.

Installation and operational characteristics

As an item from the Electronic control modules and controllers category, the set requires professional installation and a correct adaptation procedure for the specific vehicle. In practice, this means the necessity of:

• mechanically mounting the DDE controller in the factory location,
• connecting the wiring harnesses according to the original BMW installation diagram,
• using the included CAS3 module and key as a paired set,
• performing basic diagnostic procedures after installation.

Such an approach allows for the restoration of correct starting, stable engine operation, and full communication with onboard systems. The used nature of the set makes it an economical alternative to purchasing new electronics while maintaining the manufacturer's original specifications.

Expert support and selection of appropriate modules

If you want to better understand the operating principles of the BMW engine controller, comfort modules, and the iDrive system in related models, it is worth checking out expert material. Practical tips regarding the repair of the engine controller, FRM module, and other electronic components in the 3 and 5 Series can be found in the article Driving pleasure for years – how to take care of iDrive systems and electronic modules in BMW 3 and 5 Series models.

For those analyzing the differences between new and used automotive electronic components, a cost and quality guide may also be helpful, available in the post New or used? A comparison of costs and quality of car parts, which discusses, among other things, the advantages of using original dismantled modules.

Related BMW Electronic control modules and controllers

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other items from the same group, such as engine controllers, comfort modules, or light controllers, check out the available parts in the BMW Electronic control modules and controllers category.