BMW E90 LCI N47N 320d 184HP ECU KIT DDE CAS 3 Key 8512291 Automatic

Visual condition of the part 

The product shows signs of use visible in the photos. 

BMW E90 LCI N47N 320d 184HP ECU KIT DDE CAS 3 Key is a complete control kit designed for versions with the N47N engine and an automatic transmission. The set includes the DDE engine control module, the CAS 3 module, and a key, which facilitates a consistent replacement of the powertrain electronics. Such a set is particularly useful for professional repair of the control system in BMW 3 Series E90 LCI models.

Specifications and technical data

• SKU: 8512291-3
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8512291
• Substitutable numbers: 13618519671, 8519671, 0281017446, 0 281 017 446, 13618518272, 8518272, 13618515081, 8515081, 13618512291, 8512291, 13618506566, 8506566, 13618510829, 8510829, 61359226238, 9226238
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Application of the ECU DDE CAS 3 kit with key

The presented set is intended for BMW vehicles with the N47N 184 HP engine unit, equipped with an automatic transmission. Combining the DDE controller with the CAS 3 module and a matched key allows for maintaining the consistency of the immobilizer system and starting logic. Thanks to this, the set can be used when replacing a damaged engine controller, in case of key authorization issues, or a failure of the CAS module.

Benefits of using a complete controller set

Choosing a complete ECU set with a CAS 3 module and key reduces the risk of problems with coding and synchronization of individual components. In practice, this means:

• a consistent engine control and immobilizer system,
• easier configuration during installation in the vehicle,
• reduced risk of software conflicts between modules,
• the possibility of effective diagnostics after installation.

For workshops specializing in the BMW brand, such a set is a convenient service solution, allowing for shorter repair times and limiting the number of additional programming tasks.

Technical characteristics and integration with the automatic transmission

The discussed set is prepared to work with an automatic transmission, which is important for torque control logic, kick-down functions, and gear shifting strategies. The DDE controller communicates with modules responsible for the transmission, safety, and comfort systems, which is why it is essential to maintain hardware and software compatibility with the specific vehicle configuration.

Before installation, it is recommended to verify compatibility by OEM number and interchangeable numbers, as well as to consult with a diagnostician who has the appropriate software for adapting BMW controllers. This helps avoid incompatibility and ensures stable operation of the powertrain after replacement.

Product condition and installation aspects

The set comes from the Electronic control modules and controllers category and is intended for re-installation in a vehicle after prior inspection by a qualified service center. During installation, pay attention to the correct connection of wiring harnesses, proper securing of connectors, and performing adaptation procedures in accordance with BMW service documentation.

It is recommended to perform full computer diagnostics after installation, including reading error codes, checking communication between modules, and testing the start-up and operation of the engine under various load conditions.

Expert support and selection of used electronics

If you want to better understand how to safely select used control modules and sensors, how to check hardware and software compatibility, and what to pay attention to during installation, use the Global Parts guide: Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?

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