BMW E87 LCI E90 118d 318d Diesel N47 Diesel ECU KIT DDE 7811701 + CAS3 + Key

BMW E87 LCI E90 118d 318d Diesel N47 Diesel ECU KIT DDE + CAS3 + Key is an original electronic control module designed for N47 diesel units in 1 and 3 series models with a manual transmission. The set includes the engine computer along with the key, which facilitates matching to the existing installation and allows for efficient controller replacement in Diesel engine vehicles. This is a solution for users looking for factory control electronics in a preserved, functional condition.

Specifications and technical data

• SKU: 7811701-4
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7811701
• Substitutable numbers: 13617809001, 7809001, 0281015042, 13618506281, 8506281, 13617812501136178100011361781170113617807143, 7812501781000178117017807143, 13617807204136178120011361780782813617807529, 7807204781200178078287807529, 1361850871213617808403136
• Fuel type: Diesel
• Category: ECUs & Computer Modules

Purpose and function of the controller

The presented engine computer is responsible for precise control of the N47 power unit in BMW E87 LCI and E90 models in 118d and 318d versions. The module manages key diesel engine operating parameters, such as fuel dosage, boost pressure, starting strategy, and emission control, ensuring stable and predictable operation of the drivetrain.

The presence of the key in the set facilitates the adaptation process in the vehicle, as the controller and transponder are already synchronized. In practice, this means less interference with security systems and faster configuration in a car equipped with a manual transmission.

Benefits of using an original BMW module

As an item from the Electronic control modules and controllers group, this engine computer was designed specifically for the electrical architecture of the BMW E87 LCI and E90. This means:

• factory fitment to electrical harnesses and connectors in the engine bay,
• compatibility with BMW diagnostic software,
• preservation of original Diesel engine control strategies,
• consistency with other modules in the vehicle (e.g., the immobilizer system).

Thanks to this, replacing a damaged controller with an original used module allows for restoring the proper operation of the power unit without the need for costly installation modifications or the use of universal solutions.

Characteristics of working with the N47 Diesel engine

N47 diesel engines require precise control regarding fuel injection, common rail pressure monitoring, and management of auxiliary systems. The applied engine computer works with equipment dedicated to the 118d and 318d versions, ensuring:

• stable starting in various temperature conditions,
• correct response to load during city and highway driving,
• coordination with the manual transmission,
• support for engine protection functions in case of detected irregularities.

For the user, this means predictable car behavior and the possibility of further diagnostics and servicing in accordance with the manufacturer's standards.

Condition, verification, and practical application

The module comes from the secondary market and has a Used status, which in practice means it was previously operated in a vehicle but is suitable for re-installation after proper adaptation. This type of controller is often chosen for repairs when the factory electronics are damaged, and the owner wants to maintain the original system architecture without investing in a new component.

To maximize the potential of the used controller, it is recommended to have it installed at a specialized service center that has experience with BMW electronics and the appropriate diagnostic tools. This allows for correctly performing coding, synchronization with the immobilizer, and functional tests after installation.

More about used electronics and BMW parts

If you want to better understand when choosing a used engine computer is cost-effective and how to safely select such a component for your car, it is worth checking out specialized materials. Practical tips on selecting engine controllers, comfort modules, and parking sensors can be found in the article The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?.

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 controllers, power unit management modules, or operating parameter control systems, check out the available parts in the BMW electronic control modules and controllers category.