BMW E87 E90 E91 118d 318d M47N2 122HP Engine ECU KIT DDE 7798179 CAS2 + Key

BMW E87 E90 E91 118d 318d M47N2 122HP Engine ECU KIT DDE CAS2 + Key is an original engine control unit from the Electronic control modules and ECUs category, designed for selected BMW 1 and 3 Series models with the M47N2 engine. This is a solution for users who expect stable powertrain operation, the preservation of factory parameters, and full compatibility with the vehicle's electrical architecture. Thanks to the use of OEM parts, it is possible to restore the stock engine performance characteristics without compromising safety and reliability.

Specifications and technical data

• SKU: 7798179-1
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7798179
• Substitutable numbers: 13617808124, 7808124, 13617803372, 7803372, 13617801710, 7801710, 13617799854, 7799854, 13617798179, 7798179, 13617797496, 7797496, 13617797216, 7797216, 13617795844, 7795844, Control Unit, 0281012502, 0 281 012 502, 61356943771
• Category: ECUs & Computer Modules

Purpose and function of the ECU

The presented engine computer is responsible for the precise control of the M47N2 diesel unit in BMW 118d and 318d models. The module monitors key engine operating parameters, such as fuel dosage, boost pressure, or injection corrections, while communicating with sensors and other controllers in the vehicle. Using an original module allows for maintaining software consistency, diagnostic logic, and vehicle bus communication.

For workshops specializing in the BMW brand, such a controller is the foundation for a properly performed repair of the injection system and engine peripherals, and for the user – an opportunity to restore proper dynamics, smooth operation, and fuel economy.

Benefits of using an original BMW module

Using an original engine computer in BMW 1 and 3 Series with the M47N2 engine provides a number of practical benefits:

• Full integration with the electrical system – the module is designed to work with the factory wiring harness, sensors, and other controllers in the vehicle.
• Stable operation in various operating conditions – from city driving to long highway trips.
• Possibility of proper diagnostics using factory BMW service tools, which facilitates configuration and potential coding.
• Preservation of stock engine control maps, which translates into predictable performance and compliance with the manufacturer's factory specifications.

For users who value predictability and consistency of driving parameters, choosing such a controller is a reasonable solution, allowing to avoid problems typical of replacements of uncertain origin.

Product characteristics and practical application

As an element from the Electronic control modules and ECUs group, the engine computer in a BMW is responsible not only for the combustion process itself but also for communication with other vehicle systems, such as comfort systems, safety systems, or body modules. In practice, this means that a correctly selected controller influences:

• smoothness of acceleration and throttle response,
• ease of cold and warm starting,
• stability of idle speed,
• proper cooperation with OBD diagnostic systems.

Replacing the engine computer is particularly important in the case of damage due to power surges, water ingress, or failed software modification attempts. Using an original module allows for restoring the stock configuration and eliminating engine instability.

Product condition and installation aspects

The offered controller is a used item, which in practice means a favorable compromise between the cost of repair and maintaining original BMW quality. For workshops and individual users, this is an attractive alternative to purchasing a new module, especially when repairing older 1 and 3 Series vehicles.

Before installation, standard procedures related to adaptation and potential coding of the controller to a specific vehicle should be taken into account. A properly performed installation process, using appropriate service software, allows for seamless integration of the module with the rest of the car's systems.

Technical support and further reading

If you want to better understand how to take care of electronic systems in BMW 3 and 5 Series, including the engine ECU and comfort modules, it is worth checking out specialized materials. Practical tips regarding diagnostics, repair, and the use of salvaged parts can be found in the article Driving pleasure for years – how to take care of iDrive systems and electronic modules in BMW 3 and 5 Series models, which discusses, among other things, issues related to BMW engine controllers.

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