BMW 1 3 Series 1 E87 E90 E91 M47N2 118d 318d ECU Kit DDE 7797496 CAS2 + Key

BMW 1 3 Series 1 E87 E90 E91 M47N2 118d 318d 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 controller, a CAS2 module, and a matched key, which facilitates consistent integration of the powertrain electronics and the immobilizer. This is a practical solution for workshops and users who want to restore the proper operation of the engine control system in a technically correct and cost-effective manner.

Specifications and technical data

• SKU: 7797496-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7797496
• Category: ECUs & Computer Modules

Purpose and function of the BMW 1 3 Series 1 E87 E90 E91 M47N2 118d 318d ECU Kit DDE CAS2 + Key

The presented kit is part of the Electronic control modules and controllers group, designed to work with the M47N2 diesel engine in BMW 1 Series E87 and 3 Series E90/E91 models. Combining the DDE controller with the CAS2 module and a paired key allows for maintaining compatibility of the immobilizer system, ignition, and engine operation control logic. A set configured in this way is particularly useful in situations where the existing controller has been damaged, key authorization problems have occurred, or communication errors have appeared between the modules responsible for starting and operating the engine.

Benefits of using a complete controller kit

Using a ready-made DDE + CAS2 + key kit provides a number of practical advantages in daily service work and vehicle operation:

• consistency of powertrain electronics and security features thanks to factory-tuned modules,
• reduction of the need for time-consuming programming and adaptation compared to replacing individual components,
• possibility of faster diagnostics and vehicle startup after an engine controller or CAS module failure,
• better control over the startup process and key authorization in the immobilizer system. For workshops specializing in the BMW brand, such a kit provides a functional base for engine electronics repairs, especially in the case of vehicles after major electrical faults or engine unit replacement.

Product characteristics and application in BMW 1 and 3 Series

The ECU DDE kit with the CAS2 module and key is intended for integration with the factory electrical installation of the BMW 1 Series E87 and 3 Series E90/E91 with the M47N2 engine. This makes it possible to maintain the original engine operation control logic, communication with other modules in the vehicle, and support for functions related to starting. The product comes from the BMW brand offer, which means compliance with factory manufacturing standards and the electronic architecture of these models. For the user, this translates into predictable vehicle behavior after installation and the possibility of further service maintenance using standard diagnostic tools dedicated to BMW.

Condition, verification, and installation aspects

The kit comes from the used parts segment, which allows for a favorable compromise between the cost of repair and maintaining the original electronic architecture of the vehicle. Before installation, it is recommended to perform standard verification of compatibility with the specific vehicle equipment version and to carry out diagnostics after installation to confirm proper communication of all modules in the vehicle network. In workshop practice, such a set enables efficient repair in the event of engine controller damage or problems with the CAS module, minimizing the risk of incompatibility between individual elements of the security and control system.

Expanding knowledge about BMW electronics

If you want to better understand the specifics of engine controllers, comfort modules, and the iDrive system in vehicles of this brand, it is worth reaching for specialized materials. Practical tips on repairing controllers, FRM modules, and using dismantled parts 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 using dismantled parts?, which discusses typical problems and good service practices. If you are planning a comprehensive repair or upgrade of the engine control area in your BMW and need other elements from the same group, such as additional controllers, security modules, or powertrain management systems, check the available parts in the BMW electronic control modules and controllers category.