BMW E90 E91 LCI 316d N47N 116HP ECU Engine Kit DDE 8507202 CAS3 Key Manual

BMW E90 E91 LCI 316d N47N 116HP ECU Engine Kit DDE CAS3 Key Manual is a complete engine control unit kit designed for facelifted 3 Series models equipped with the N47N engine and a manual transmission. The kit includes the DDE engine control unit, the CAS3 module, and a matched key, allowing for a seamless transfer of the entire control system. This solution is particularly useful for engine replacements, electronics repairs, or the adaptation of used equipment.

Specifications and technical data

• SKU: 8507202-3
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8507202
• Substitutable numbers: 13618519672, 8519672, 13618507202, 8507202, 13618515082, 8515082, 13618512292, 8512292, 13618518273, 8518273, 13618510832, 8510832, 0281016496, 0 281 016 496, 61359226238, 9226238
• Gearbox type: Manual
• Category: ECUs & Computer Modules

Purpose and function of the ECU DDE CAS3 kit

The presented kit is dedicated to the BMW 3 Series E90/E91 LCI 316d with the N47N engine, where maintaining compatibility between the engine control unit, the CAS3 immobilizer module, and the key is crucial. Integrating these components into a single set reduces the risk of vehicle starting issues, CAN network communication errors, and the need for time-consuming adaptation of individual modules.

In practice, such a set is effective for:

• replacing a damaged DDE unit with a fully matched kit,
• swapping an N47N engine between vehicles with similar configurations,
• resolving issues with start authorization and communication with the CAS3.

Electronic control modules and ECUs – advantages of a complete solution

The set from the Electronic control modules and ECUs category ensures consistency in software and engine operating parameters, which directly impacts the engine's refinement, throttle response, and idle stability. Combining the DDE with a matched CAS3 and key minimizes the need for additional programming, which is important for both workshops and individual users.

Key benefits include:

• internal compatibility – the modules are already synchronized with each other,
• reduced coding and adaptation costs,
• greater predictability of the repair outcome compared to sourcing individual components.

Manual transmission compatibility

The presented kit is configured for a manual transmission, which is significant for torque control logic, interaction with driver assistance systems, and communication with other vehicle modules. Proper matching to the transmission type reduces the risk of configuration mismatch errors and ensures the correct operation of diagnostic functions.

For a workshop, this means a simpler installation and configuration process, and for the user – stable, predictable powertrain operation after replacing the kit.

Condition, verification, and service application

The kit comes from a used vehicle, which in workshop practice is often an optimal compromise between cost and functionality. Components of this type are frequently used in accident repairs, engine replacements, and restoring the functionality of vehicles that have suffered damage to the control electronics. By maintaining completeness (DDE + CAS3 + key), the original engine control configuration can be effectively restored.

Before installation, a standard diagnostic procedure and verification of compatibility with the specific vehicle configuration are recommended, which allows for fully utilizing the kit's potential and reducing the time required for adaptation.

Expanding the BMW control system

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 controllers, auxiliary modules, or engine management systems, check out the available parts in the BMW electronic control modules and ECUs category.

For a comparison of how other premium manufacturers approach maintaining brand character in the context of electronics and original components, it is worth reading the blog article Audi and pure emotion – how used parts help maintain the brand's DNA, which highlights the importance of properly selected modules and components in modern cars.