BMW 1 Series E81 E82 E87 LCI N47S 123d ECU Kit DDE CAS 3 Keys 7810002 Manual

BMW 1 Series E81 E82 E87 LCI N47S 123d ECU Kit DDE CAS 3 Keys Manual is a complete engine control and immobilizer kit designed for BMW 1 Series models equipped with the N47S 123d engine and a manual transmission. The kit includes the DDE engine control unit, the CAS 3 module, and matched keys, which facilitates restoring the electronic system's functionality after a failure or engine replacement. This solution allows for a consistent, technically correct configuration of the vehicle's powertrain electronics.

Specifications and technical data

• SKU: 7810002-2
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7810002
• Substitutable numbers: 13617811702, 7811702, 13618512589, 8512589, 13617812002 13617810002 13617808402 13618506325, 7812002 7810002 7808402 8506325, 13617809002 13617812502 13618508713, 7809002 7812502 8508713, 123d, N47S, 0281013776, 0 281 013 776, 61359147196, 9147196
• Gearbox type: Manual
• Category: ECUs & Computer Modules

Application of the ECU DDE CAS 3 kit with keys

The presented kit is intended for BMW 1 Series vehicles of the E81, E82, and E87 generations after the facelift (LCI) with the N47S 123d engine and a manual transmission. The combination of the DDE controller, CAS 3 module, and keys enables consistent management of engine operation, start authorization, and anti-theft protection, without the need for time-consuming programming of individual components from scratch.

Construction and function of the kit components

The kit includes an electronic DDE engine control unit responsible for precise control of the N47S 123d unit's operating parameters, a CAS 3 module performing immobilizer functions, and matched keys that work with this module. This combination ensures data consistency across the entire system, which is particularly important when replacing electronics after a controller failure, CAS communication issues, or during a powertrain swap. By maintaining the completeness of the kit, it is possible to reduce the risk of software conflicts, synchronization errors between the engine controller and the CAS module, and vehicle starting problems. This is a practical solution for workshops specializing in BMW electronics and for users who want to restore the full functionality of the powertrain in a way that is as close to factory standards as possible.

Benefits of using a used ECU kit

Choosing a used ECU DDE CAS 3 kit with keys for a BMW 1 Series allows for a significant reduction in repair costs compared to purchasing new modules, while maintaining high functionality. The kit comes from dismantling, which in practice means that the components have already been operated in a vehicle and are adapted to real-world working conditions. For many workshops, this is a beneficial base for further configuration, adaptation, and potential programming for a specific vehicle. The completeness of the kit facilitates the installation and configuration process – the workshop receives the engine controller, CAS 3 module, and keys, which reduces the number of potential points of non-compliance in the system. This is especially important for modern diesel units, where the correct cooperation of all electronic modules has a direct impact on engine stability, driving culture, and operational safety.

Designed for manual transmission

The kit is prepared for use with a manual transmission, which is important when selecting electronics for a specific powertrain configuration. The engine controller and its associated functions are adapted to the operating characteristics of a manual gearbox, which facilitates proper integration with the existing vehicle installation and minimizes the need for deep software modifications.

Technical support and knowledge about BMW modules

When working with advanced BMW electronics – such as engine controllers, CAS modules, or comfort systems – it is worth using reliable sources of knowledge. If you want to better understand the principles of operation of controllers, FRM modules, and the iDrive system in BMW models and learn how to safely use parts from dismantling, read the article Driving pleasure for years – how to take care of iDrive systems and electronic modules in BMW 3 and 5 series models using parts from dismantling?.

Other BMW electronic control modules

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