BMW E60 E87 E90 120d 320d 520d M47N2 ECU Engine Control Kit DDE 7801711 CAS2 Key

BMW E60 E87 E90 120d 320d 520d M47N2 ECU Engine Control Kit DDE CAS2 Key is a factory-original electronic engine control unit, designed for precise management of the diesel engine in the 3 Series E90. This original module from the Electronic control modules and ECUs group ensures compatibility with the factory installation, stable communication with the CAN network, and predictable drivetrain performance. It is a practical solution for replacing a damaged ECU or for professional engine control system repairs.

Specifications and technical data

• SKU: 7801711-6
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 7801711
• Substitutable numbers: 13617808125, 7808125, 13617797497, 13617798187, 13617803373, 13617805349, 13617799317, 13617801711, 13617797356, 13617795845, 13617797217, 13617799855, 13617798180, 13617801216, 0281013251, 0 281 013 251, 61359226238, 9226238
• Category: ECUs & Computer Modules

Purpose and function of the engine control unit

The engine control unit in the BMW E60 E87 E90 120d 320d 520d M47N2 ECU Engine Control Kit DDE CAS2 Key is responsible for comprehensive control of the engine's operation, including fuel injection, boost pressure regulation, idle speed control, and integration with safety and comfort systems. As an OEM component from BMW, the module is designed to operate within the vehicle's electronic architecture, which ensures proper communication with other control units in the vehicle.

Replacing it with an original engine control unit from the same family allows for the preservation of factory operating parameters, reduces the risk of communication errors, and facilitates diagnostics using dedicated service tools.

Compatibility and interchangeable part numbers

The presented control unit belongs to the group of ECUs used in BMW 3 Series vehicles with the M47N2 engine, for which the manufacturer has provided a range of reference and interchangeable numbers. Thanks to this, when selecting parts, one can use a wide list of compatible designations, which makes it easier to find the appropriate module in case of upgrades or repairs.

The presence of multiple replacement numbers in the technical specification means that the control unit belongs to a family of compatible units that can be used interchangeably in specific equipment configurations, provided that the appropriate programming and matching procedure for the specific vehicle is followed.

Benefits of using an original BMW module

Using an original BMW engine control unit instead of a damaged or unstable ECU brings a number of practical benefits:

• preservation of factory engine control logic and cooperation with other modules,
• easier integration with the vehicle's existing electrical installation,
• greater predictability of drivetrain behavior after adaptation and coding,
• the ability to utilize the full diagnostic potential of factory service software.

For workshops specializing in the BMW brand and for informed users, this means a more controlled repair process, a lower risk of compatibility issues, and stable drivetrain operation after the service is completed.

Condition, origin, and use in service practice

The offered engine control unit comes from dismantling and is a used component, which makes it an attractive cost-effective solution while maintaining the manufacturer's original specifications. Such modules are frequently used in professional service centers dealing with BMW electronics, especially for repairs following control unit failures, wiring damage, or communication problems within the vehicle network.

Before installation, it is recommended to perform full vehicle diagnostics, verify number compatibility based on technical specifications, and plan the programming and potential immobilizer matching procedure to ensure proper engine start and operation.

Technical support and further reading

If you want to better understand how the repair of a BMW engine control unit and other electronic modules using parts from dismantling works in practice, it is worth reading the article on our blog: Driving pleasure for years – how to take care of iDrive systems and electronic modules in BMW 3 and 5 series models. You will find practical tips on diagnostics, selecting used control units, and safe installation.

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 control units, engine management modules, or electronic parameter control systems, check the available parts in the BMW electronic control modules and ECUs category.