BMW 5 Series E60 E61 LCI 520d N47 ECU KIT DDE CAS3 + 2 Keys 7811700 Manual

BMW 5 Series E60 E61 LCI 520d N47 ECU KIT DDE CAS3 + 2 Keys Manual is a complete engine control and immobilizer kit designed for facelifted BMW 5 Series models with the N47 engine and manual transmission. The set includes the DDE controller, CAS3 module, and two keys, allowing for a seamless match of the powertrain electronics and vehicle security systems. This is a practical solution for workshops and users performing engine control system replacements or adaptations.

Specifications and technical data

• SKU: 7811700-6
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7811700
• Substitutable numbers: 13618506199028101504361359147216, 85061999147216, 136178071421361780840113617807200, 1361780900013617812000, 1361781170013617810000, 1361780782713617807530, 1361781250013618508711, 13617806699, 780714278084017807200, 780900078120007811700, 13618506199, 8506199, 13617812500, 7812500, 13617812000, 7812000, 13617811700, 7811700, 13617810000, 7810000, 13617809000, 7809000, 13617808401, 7808401, 13617807827, 7807827, 13617807530, 7807530, 13617807200, 7807200, 13617807142, 7807142, 7806699
• Gearbox type: Manual
• Category: Control Modules

Purpose and compatibility

The ECU DDE kit with the CAS3 module and keys has been developed for the BMW 5 Series E60/E61 LCI 520d with the N47 engine, equipped with a manual transmission. The consistency of the components in a single set facilitates matching to a specific vehicle configuration, reducing the risk of communication issues between the engine controller, comfort module, and immobilizer system.

The set is particularly useful for tasks such as replacing a damaged controller, powertrain swaps, or advanced engine electronics repairs, where maintaining compatibility between the DDE, CAS3, and keys is crucial.

Structure of the ECU KIT DDE CAS3 + 2 Keys

The offered set consists of three main functional components:

• DDE engine controller responsible for managing the N47 unit,
• CAS3 module handling start authorization and communication with the keys,
• two keys integrated with the vehicle's security system.

This combination ensures a cohesive control system, which in practice facilitates the adaptation process in the vehicle and helps reduce diagnostic time. The complete powertrain electronics set is highly valued in professional workshops specializing in BMW electronics.

Application in vehicles with manual transmission

The presented ECU KIT is intended for cars with a manual transmission, which is significant when selecting the appropriate DDE controller. Proper matching to the transmission type affects correct interaction with vehicle systems, such as torque management, driver assistance functions, or starting logic.

For workshops specializing in the BMW brand, such a set is a convenient solution that allows for shorter repair times and reduces the number of potential software incompatibilities between individual modules.

Benefits of choosing a used BMW ECU kit

The offered set belongs to the Computers and Controllers category, meaning it is a key element of the electronic system responsible for engine operation and start authorization. Choosing a complete, used DDE + CAS3 + keys set allows for a significant reduction in repair costs compared to purchasing new modules, while maintaining the original BMW architecture.

A used, original controller with a matched CAS3 module and keys also carries a lower risk of coding issues compared to randomly selected individual components. Electronic consistency in one set facilitates the work of electricians and diagnosticians, and also accelerates the restoration of full vehicle functionality.

More information and related products

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, engine management modules, or security systems, check out the available parts in the BMW Computers and Controllers category.

Before deciding to install a used controller set, it is worth learning about good practices for selecting and verifying automotive electronics – you can find practical tips in the article A second life for electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?.