BMW E60 E87 E90 120d 320d 520d M47N2 Engine Control Unit ECU Kit DDE 7799855

BMW E60 E87 E90 120d 320d 520d M47N2 Engine Control Unit ECU Kit is an original electronic engine control module designed for selected BMW 1 and 3 series models equipped with the M47N2 unit. Thanks to its factory design, the ECU ensures precise engine management, stable communication with the vehicle's electrical system, and the possibility of professional diagnostics and programming. This is the ideal solution for users who want to restore the full efficiency of the powertrain while maintaining compliance with BMW factory standards.

Specifications and technical data

• SKU: 7799855-3
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7799855
• Substitutable numbers: 7799855, 13617799855, 7808125, 13617808125, 7797497, 13617797497, 7798187, 13617798187, 7803373, 13617803373, 7805349, 13617805349, 7799317, 13617799317, 7801711, 13617801711, 0281012754, 0 281 012 754
• Category: ECUs & Computer Modules

Purpose and function of the BMW engine control unit

The presented engine computer belongs to the Electronic control modules and controllers category and is responsible for key processes of the M47N2 diesel unit in BMW E87 120d and E90 320d models. The module monitors, among other things, fuel dosing, boost control, injection system operation, and interaction with other electronic vehicle systems, which translates into proper dynamics, smooth operation, and operational safety.

By using an original controller, full compatibility with the car's electrical architecture is maintained, which facilitates adaptation, coding, and subsequent service maintenance using factory BMW diagnostic tools.

Benefits of using an original BMW ECU

Using a factory engine computer to replace a damaged or unstable module allows you to:

• restore proper engine starting and stable operation across all load ranges,
• ensure software consistency with other controllers in the vehicle,
• maintain compliance with factory injection maps and the operating strategy of the M47N2 unit,
• facilitate error diagnostics and potential software updates in the future.

For workshops specializing in the BMW brand and users who care about the technical correctness of repairs, choosing an original control module is a safe and predictable solution in terms of the final result.

Condition, origin, and installation aspects

The offered controller comes from disassembly and is sold as a used electronic module. Such components are frequently chosen by professional services and conscious users as an economical alternative to new parts, while maintaining original build quality. Before installation, standard procedures for BMW ECUs must be considered, such as matching to a specific vehicle, potential programming, synchronization with the immobilizer, and checking the electrical system for previous faults.

Installation in a specialized workshop that has the appropriate diagnostic software and experience in working with BMW electronic controllers is recommended, as this minimizes the risk of communication problems in the vehicle network and speeds up the entire startup process.

Technical support and knowledge about BMW modules

If you want to better understand how to take care of your BMW engine controller and other electronic modules in the 3 and 5 series, as well as how to safely use parts from disassembly, read the article: Driving pleasure for years – how to take care of iDrive systems and electronic modules in BMW 3 and 5 series models. This is a practical source of knowledge for those planning conscious repairs and electronics upgrades in their cars.

Related BMW Electronic control modules and controllers

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