BMW E81 E87 E90 LCI 120d 320d N47 ECU Kit DDE 8506374 CAS3 + 2 Keys Automatic

BMW E81 E87 E90 LCI 120d 320d N47 ECU Kit DDE CAS3 + 2 Keys Automatic is a complete engine control and immobilizer set designed for selected BMW models with the N47 engine and automatic transmission. The set includes a DDE controller, a CAS3 module, and two matched keys, which significantly facilitates professional control system replacement. This is a practical solution for workshops and users who need a consistent, factory-spec engine electronics set.

Specifications and technical data

• SKU: 8506374-2
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8506374
• Substitutable numbers: 13618512498 61359147226, 8512498 9147226, 13617812538 13618506437 13618510591 13617823421, 7812538 8506437 8510591 7823421, 13618506374 13617823420 13618506438, 8506374 7823420 8506438, 0281016067, 0 281 016 067
• Gearbox type: Automatic

Purpose and function of the ECU DDE CAS3 kit

The described set is dedicated to BMW vehicles with the N47 engine, particularly the 120d and 320d versions after the LCI facelift. It contains the DDE engine controller, the CAS3 module responsible for start authorization, and two keys compatible with this set. As a result, the user receives a coherent package of components that work together as they did from the factory in a single vehicle.

A set configured in this way allows for maintaining the integrity of the security system, which is essential when replacing electronics in modern vehicles. The completeness of the components reduces the risk of component matching issues and speeds up the service process.

Benefits of using the complete DDE + CAS3 + keys set

Using a ready-made ECU set with a CAS3 module and keys offers a number of practical advantages for both the service center and the end user:

• consistency of the engine controller and immobilizer system in one package,
• reduced need for complex programming from scratch,
• easier diagnostics in case of previous start-up or module communication issues,
• preservation of the factory engine control system logic.

For workshops specializing in the BMW brand, such a set is a convenient solution that allows for shorter repair times and a more organized electronics replacement process.

Compatibility with automatic transmission

The presented set is intended for vehicles equipped with an automatic transmission. This is significant for both the DDE controller configuration and communication with other modules in the vehicle. Proper matching to the transmission type is crucial for the correct operation of the drivetrain, smooth gear shifting, and interaction with safety systems.

When selecting parts, it is worth paying attention to compatibility with the specific model version and production year. If necessary, you can use our guide on selecting used OEM components, available in the article on the proper selection and service of comfort elements and electronics in a car, which helps organize the repair planning process.

Product characteristics and service application

The offered set comes from the original BMW production line, which means it maintains factory operating parameters and compatibility with the vehicle's installation. The product is used, making it an economical alternative to new components while maintaining proper functionality for service applications.

The ECU DDE set with the CAS3 module and two keys will prove particularly useful in situations such as:

• damage to the engine controller or CAS module due to an electrical failure,
• problems with start authorization and communication between modules,
• the need to replace the set after a collision or interference with the electrical system.

For those planning further optimization of the engine's performance using original components, the guide on safely increasing engine performance using used parts may be useful, as it describes the practical aspects of tuning and modifications.

Summary

BMW E81 E87 E90 LCI 120d 320d N47 ECU Kit DDE CAS3 + 2 Keys Automatic is a practical, factory-spec engine electronics set designed for selected BMW models with an automatic transmission. Combining the DDE controller, CAS3 module, and two keys into one package facilitates the service process, reduces the risk of component matching issues, and allows for maintaining the integrity of the vehicle's security system. It is a sensible choice for workshops and users looking for a functional, original solution in the form of an attractive used part.