BMW E87 E90 E91 118d 318d M47N2 122HP Engine ECU KIT DDE 7803372 CAS3 + Key

BMW E87 E90 E91 118d 318d M47N2 122HP Engine ECU KIT DDE CAS3 + Key is a factory electronic control unit designed for the powertrain with the M47N2 engine in selected BMW 1 and 3 Series models. As a component from the Electronic control modules and controllers category, it is responsible for the precise management of the engine's operation, fuel injection, and key performance parameters. This is a solution for users looking for a proven, original ECU instead of unreliable aftermarket replacements.

Specifications and technical data

• SKU: 7803372-3
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7803372
• Substitutable numbers: 13617808124, 7808124, 13617803372, 7803372, 13617801710, 7801710, 13617799854, 7799854, 13617798179, 7798179, 13617797496, 7797496, 13617797216, 7797216, 13617795844, 7795844, Control Unit, 0281013502 61356943814, 0 281 013 502 6943814
• Category: ECUs & Computer Modules

Purpose and function of the engine controller

The engine computer in the version dedicated to the M47N2 unit is responsible for comprehensive control of combustion processes in the diesel engine. The module analyzes signals from sensors, monitors fuel dosage, injection timing, accessory operation, and cooperation with other vehicle systems. This enables the maintenance of stable engine operation, correct throttle response, and proper integration with safety and comfort systems.

Choosing an original ECU for a BMW with an M47N2 engine allows you to maintain the factory control logic, which translates into predictable vehicle behavior, easier diagnostics, and better compatibility with service software. This is particularly important when repairing vehicles that are used intensively or have undergone mechanical modifications.

Benefits of using an original BMW module

The offered engine computer comes from the BMW product line, which means it adheres to factory quality and compatibility standards. In practice, this translates into:

• a precise fit for the vehicle's electrical installation and network architecture,
• consistency with factory control maps and diagnostic software,
• the ability to perform correct coding and adaptation in the vehicle according to BMW service procedures,
• reduced risk of communication errors with other controllers in the car.

For workshops and private users, this means a more predictable installation process and a lower risk of issues after replacing the ECU. Electronic control modules and controllers in the OEM version are particularly valued in vehicles where operational stability and compliance with the factory configuration are crucial.

Condition, origin, and installation aspects

The presented engine computer is a second-hand component, which allows for a significant reduction in repair costs compared to a new part, while maintaining the original manufacturer's specifications. The module is intended for further configuration for a specific vehicle – in accordance with service practice, it may require software matching, coding, or potential data cloning at a specialized workshop.

Before purchasing, it is recommended to verify compatibility based on manufacturer markings and engine configuration to ensure proper cooperation with the vehicle's installation. Thanks to this, the engine computer can be used both as a repair component after an ECU failure and as a base for further service work on the powertrain.

Selection by numbers and technical support

This controller belongs to a group of parts where the consistency of manufacturer markings and hardware/software versions is of key importance. In practice, this means it is necessary to compare data with the existing module in the car or consult with a workshop specializing in BMW electronics. Proper selection translates into seamless communication with other controllers and minimizes the risk of errors after installation.

If you want to better understand how to safely choose used ECUs and other vehicle electronics, it is worth checking out the Global Parts guide – Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?. You will find practical tips there regarding selection by part numbers, compatibility, and installation.

Expansion and other BMW control modules

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 comfort controllers, body modules, or additional ECU units, check out the available parts in the BMW electronic control modules and controllers category.

For owners of older 1 and 3 Series models, already considered youngtimers, an interesting supplement to your knowledge might be the article on restoring vehicles from the turn of the 90s and 2000s – The second life of a youngtimer – how used car parts rejuvenate cars from 1998–2012. It is a good source of information on how to consciously use the second-hand parts market for the long-term maintenance of a BMW.