BMW E81 E87 E90 E91 LCI 118d 318d N47 Diesel ECU KIT DDE 8506375 CAS3 + Key

BMW E81 E87 E90 LCI 118d 318d N47 Diesel ECU Kit DDE 8506375 CAS3 Key is a complete kit from the Electronic Control Units and Controllers category, designed for N47 diesel engines in selected facelifted BMW 1 and 3 Series models. It includes the DDE controller, CAS3 module, and key, which significantly simplifies system adaptation and reduces the risk of immobilizer issues.

Specifications and technical data

• SKU: 8506375-3
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8506375
• Substitutable numbers: 13618577664, 8577664, 13618506375, 8506375, 13618510592, 8510592, 13618506433, 8506433, 13617823423, 7823423, 13617823422, 7823422, 13618506434, 8506434, 13618512499, 8512499, 13617812540, 7812540, 13618518167, 8518167, 0268016069, 0 268 016 069, 61359147226, 9147226
• Fuel type: Diesel
• Category: ECUs & Computer Modules

Purpose of the DDE CAS3 ECU Kit with Key

The presented kit is dedicated to BMW vehicles with the N47 Diesel engine, specifically for the 118d and 318d versions in E81, E87, and E90 LCI body styles. The combination of the DDE controller with the CAS3 module and a matched key allows for coherent management of the engine's operation, vehicle security, and start authorization.

A set configured in this way is particularly useful when replacing a damaged engine controller or during electrical system repairs, where maintaining compatibility between the engine electronics and the security system is crucial.

Benefits of Using a Complete DDE + CAS3 + Key Kit

Using a ready-made ECU kit with a CAS3 module and key offers a number of practical advantages in the workshop and during servicing:

• consistency of components responsible for vehicle start and security,
• reduced need for time-consuming programming from scratch,
• easier diagnosis of potential faults in the engine control system,
• better control over the operating parameters of the N47 diesel unit.

Thanks to this kit, the engine control system in BMW 1 and 3 Series diesel cars can be restored in an organized manner, maintaining high repeatability of the repair outcome.

Technical Characteristics and Vehicle Integration

As an element from the Electronic Control Units and Controllers group, the DDE with CAS3 kit works with the vehicle's electrical system, engine sensors, and safety systems. The DDE controller is responsible for precise fuel injection, injector control, diesel engine ancillary operation, and communication with other modules in the vehicle network.

The CAS3 module functions as the central element of the access and start system, and the included key is paired with it, facilitating integration with the vehicle after appropriate matching to a specific unit. In practice, this translates to stable cooperation between the engine control system and the immobilizer system.

Condition, Origin, and Application in Service Practice

The offered kit comes from a BMW vehicle and is a used part, providing an attractive cost alternative to new components. This type of solution is often chosen by workshops specializing in automotive electronics and by advanced users looking for a reasonable compromise between price and functionality.

Before installation, it is recommended to verify compatibility with the specific vehicle equipment version and engine configuration, as well as to perform standard diagnostic procedures after installation to confirm correct communication of all modules in the vehicle network.

Technical Support and BMW Electronics Selection

If you need more in-depth knowledge on selecting and installing used engine controllers and other electronic components, the Global Parts guide will be helpful: Used Automotive Electronics Onboard – Why Choose Second-Hand ECU Modules and Sensors?. There you will find practical tips on compatibility, installation procedures, and common service questions.

When searching for other BMW Electronic Control Units and Controllers for similar applications, check out our dedicated offer: BMW Electronic Control Units and Controllers. This will allow you to easily compare available solutions and select the component best suited for your specific repair project.