BMW E81 E87 LCI 120d 177HP N47 Control Unit Module ECU Kit DDE 7809000 CAS3 Key

BMW E81 E87 LCI 120d 177HP N47 Control Unit Module ECU Kit DDE CAS3 Key is a complete electronic set from the Electronic control modules and drivers category, designed for the BMW 1 Series powertrain with the N47 177HP engine. The kit includes the DDE engine control unit, the CAS3 module, and a key, providing a cohesive solution for professional repair or replacement of the factory control system.

Specifications and technical data

• SKU: 7809000-6
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7809000
• Substitutable numbers: 13617809000, 7809000, 13618512587, 8512587, 0281014238, 0 281 014 238, 9226238, 61359226238
• Category: ECUs & Computer Modules

Purpose and function of the ECU DDE CAS3 kit

The presented control kit is dedicated to BMW E81 and E87 LCI (facelift) models with the 177HP N47 unit, where the DDE controller is responsible for precise engine management, and the CAS3 module handles start authorization and communication with the key. Combining these elements into one set makes it easier to restore the proper operation of the electronic system after a failure, engine replacement, or issues with the immobilizer.

By maintaining consistency between the controller, the CAS3 module, and the key, the kit helps reduce diagnostic time and minimizes the risk of software incompatibility or coding issues.

Benefits of using an original BMW module

The original BMW control module from this group ensures that the factory operating parameters of the N47 engine are maintained, including injection strategy, boost control, and interaction with other vehicle systems. Using the complete ECU + CAS3 + key kit:

• facilitates matching the electronics to a specific BMW E81/E87 LCI 120d configuration,
• reduces the need for extensive modifications to the electrical installation,
• promotes stable powertrain operation after repair,
• allows for the preservation of the factory immobilizer security logic.

For workshops specializing in the BMW brand, such a kit is a practical service solution that speeds up the repair process and reduces the number of potential points of incompatibility between individual modules.

Performance characteristics and installation

The elements included in the kit are designed as OEM components, ensuring they retain the factory mounting points and electrical connectors typical for the E81/E87 LCI platform. This facilitates installation in the vehicle and allows for the use of standard BMW service procedures.

As a part from the Electronic control modules and drivers category, the kit requires professional handling – installation in a specialized service center equipped with appropriate diagnostic software for adaptation and verification of system operation after installation is recommended.

Product condition and use in service practice

The product is offered as used, making it an attractive cost-effective alternative to new components while maintaining original BMW specifications. This type of solution is particularly useful for:

• repairs after engine control unit damage,
• replacing the N47 power unit in a BMW E81/E87 LCI 120d,
• issues with the immobilizer or communication between the key and the CAS3 module,
• restoring electronics configuration after unsuccessful modifications.

Thanks to the completeness of the kit, it is often possible to shorten vehicle downtime and limit the number of additional components needed to restore full functionality.

Technical support and selection of BMW electronics

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 additional controllers, management modules, or control systems, check out the available parts in the BMW electronic control modules and drivers category.

When selecting used control modules, including ECU kits with immobilizers, it is worth using reliable advice on compatibility and safe installation – you can find practical tips in the article The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?.