BMW E87 E90 LCI N47 118d 318d Diesel ECU Kit DDE 8512499 CAS3 + Key Manual

BMW E87 E90 LCI N47 118d 318d Diesel ECU Kit DDE CAS3 + Key Manual is a factory electronic control module designed for the N47 diesel engine in the facelifted 3 Series model. This item from the Electronic control modules and ECUs category is responsible for the precise management of the diesel engine in combination with a manual transmission, ensuring stable operating parameters and correct communication with other vehicle systems. It is a solution for users who want to restore full functionality to the drivetrain using an original control unit.

Specifications and technical data

• SKU: 8512499-3
• Mark: BMW (Genuine OE)
• Condition: Used
• OEM Part Number: 8512499
• Substitutable numbers: 13618577664, 8577664, 13618506375, 8506375, 13618510592, 8510592, 13618506433, 8506433, 13617823423, 7823423, 13617823422, 7823422, 13618506434, 8506434, 13618512499, 8512499, 13617812540, 7812540, 13618518167, 8518167, 0281017551, 0 281 017 551, 61359278745, 9278745
• Fuel type: Diesel
• Gearbox type: Manual
• Category: ECUs & Computer Modules

Purpose and function of the ECU

The engine control unit in a BMW with an N47 engine plays a key role in controlling the combustion process, fuel delivery, boost control, and monitoring systems that work with the engine. In the version dedicated to a diesel engine paired with a manual transmission, it provides the correct operating maps for this specific drivetrain configuration, which translates into predictable throttle response, correct idle speed, and stable operation across the full load range.

By using an original ECU module, compatibility with the factory BMW electronic architecture is maintained, including safety and diagnostic systems. This is particularly important when replacing a damaged control unit after a failure or communication issues within the vehicle's bus.

Benefits of using an original BMW control unit

Choosing an original engine control unit for the BMW E87 E90 LCI N47 118d 318d Diesel ECU Kit DDE CAS3 + Key Manual allows you to avoid problems typical of aftermarket replacements and incorrectly matched modules. The most important advantages include:

• Full integration with the electrical system – the control unit is designed to work with the factory wiring harness, sensors, and other electronic modules.
• Correct maps for the diesel engine – software adapted to the characteristics of the N47 unit and the manual transmission.
• Stable operation of onboard systems – correct communication with comfort modules, safety systems, and OBD diagnostics.
• Possibility of further configuration and adaptation at a specialized service center – the control unit is suitable for programming according to the requirements of a specific vehicle.

Application in a diesel drivetrain with a manual transmission

The presented control unit is designed to work with a diesel engine and a manual transmission, which is important when selecting the appropriate ECU for a specific vehicle configuration. Properly matching the module to the fuel type and transmission type affects:

• correct torque control across the entire RPM range,
• appropriate response to gear changes and loads,
• consistent operation of driver assistance systems that depend on engine operating parameters.

Thanks to this, the BMW E87 E90 LCI N47 118d 318d Diesel ECU Kit DDE CAS3 + Key Manual provides the right foundation for restoring the proper operation of the drivetrain after the previous module has been damaged or has software issues.

Characteristics of the used product

The offered control unit comes from dismantling, which allows you to combine a favorable purchase cost with maintaining the original BMW specification. A used ECU module is a good solution in situations where repairing the existing control unit is unprofitable or impossible. In practice, this means the possibility of a quick replacement while maintaining factory build quality and compatibility with the vehicle's electronics.

Before installation, it is recommended to carry out appropriate programming and adaptation procedures at a specialized service center so that the control unit is correctly assigned to the specific vehicle and works with the immobilizer and other modules.

Technical support and knowledge about BMW modules

If you want to better understand how to take care of the electronic systems in your BMW 3 or 5 Series, including the engine control unit, FRM modules, or the iDrive system, it is worth checking out proven technical materials. Practical tips on diagnostics, selecting parts from dismantling, and safe replacement principles can be found in the article Joy of driving for years – how to take care of iDrive systems and electronic modules in BMW 3 and 5 Series models using parts from dismantling?.

If you are planning a comprehensive repair or upgrade of the engine area in your BMW and need other items from the same group, such as controllers, engine management modules, or electronic control systems, check out the available parts in the BMW electronic control modules and ECUs category.