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 control kit designed for the BMW 1 and 3 Series powertrain with the M47N2 engine, including the DDE module, CAS2 module, and a matched key. The set provides a cohesive solution for vehicles requiring the replacement of the electronic engine control unit along with the associated start authorization system. By maintaining the factory electronics architecture, it allows for professional repair without interfering with the wiring harness construction.

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 ECU DDE CAS2 + Key kit

The presented set belongs to the Electronic control modules and ECUs category and is dedicated to BMW 1 Series E87 and 3 Series E90/E91 models with the M47N2 engine in 118d and 318d versions. The kit includes the DDE engine controller, the CAS2 comfort and authorization module, and a matched key, which enables the maintenance of immobilizer and starting system integrity.

A set configured in this way is particularly useful in situations where the engine controller has been damaged or there are communication issues between the DDE, CAS2, and the key, as well as during advanced powertrain electronics repairs in BMW vehicles.

Benefits of using a complete controller kit

Using a ready-made ECU kit with the CAS2 module and key reduces the time required for programming and minimizes the risk of incompatibility between individual system components. In practice, this means:

• a consistent engine control and immobilizer system,
• preservation of the factory logic of BMW electronic systems,
• easier diagnostics and configuration compared to replacing individual modules,
• the possibility of professional vehicle repair after a powertrain electronics failure.

For workshops specializing in the BMW brand, such a kit is a convenient service solution that allows them to focus on the proper adaptation of the set to a specific vehicle.

Product characteristics and practical application

The ECU DDE kit with the CAS2 module and key is intended for installation in BMW vehicles where restoring the original engine control and security configuration is required. The product comes from dismantling, which means it is an original BMW electronic component, retaining factory design solutions and compatibility with the E87/E90/E91 platform.

In practice, the set can be used both for standard replacement of a damaged controller and for more complex repairs following flooding, electrical shorts, or errors in previous programming attempts. A properly selected kit facilitates the restoration of correct engine and starting system operation without the need for deep interference with the electrical wiring.

Condition, origin, and installation aspects

The product is offered as a used BMW electronics kit, which allows for combining reasonable repair costs with the original build quality characteristic of the brand. Before installation, a standard diagnostic procedure and verification of compatibility with the specific vehicle configuration are recommended to ensure proper cooperation with other modules in the car.

Due to the specifics of BMW electronics, the installation and adaptation of the kit should be carried out by a workshop equipped with appropriate diagnostic software and experience in working with DDE and CAS2 modules. This approach increases the chance of trouble-free vehicle startup and stable powertrain operation.

More about BMW electronics and parts from dismantling

If you are planning a comprehensive repair or upgrade of your BMW's engine area and need other components from the same group, such as engine controllers, comfort modules, or security management units, check out the available parts in the BMW electronic control modules and ECUs category.

To deepen your knowledge on the use of original electronic modules from dismantling in the 3 and 5 Series, including engine controllers and the iDrive system, it is worth reading the article Joy of driving for years – how to take care of iDrive systems and electronic modules in BMW 3 and 5 Series models, where practical repair and electronics selection procedures are described.

If you are interested in the broader context of using original used parts in BMW vehicles, including the principles of selecting components by catalog numbers and examples of long-term operation, the entry BMW – sports performance and precision. How do original used parts extend the life of the Bavarian icon? will also be helpful.