Mercedes W204 C200CDI BlueEFFICIENCY OM651.913 Engine ECU Kit A6519007500 Key

Mercedes W204 C200CDI BlueEFFICIENCY OM651.913 Engine ECU Kit is a precisely selected set of engine electronics designed for a diesel unit paired with an automatic transmission. By maintaining the consistency of the components included in the set, the product ensures stable operation of the powertrain and facilitates professional repair or replacement of the factory module.

Specifications and technical data

• SKU: A6519007500-10
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6519007500
• Substitutable numbers: A6519007500, A 651 900 75 00, A0064461540, A 006 446 15 40, A2079052600
• Fuel type: Diesel
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Application and function of the ECU kit

The presented engine control unit kit is dedicated to the Mercedes C-Class W204 generation, C200CDI BlueEFFICIENCY version with the OM651.913 engine. In combination with an automatic transmission, it is responsible for coordinating the operation of the diesel unit, including fuel injection control, combustion parameter monitoring, and communication with other vehicle systems.

The kit with the key allows for maintaining electronic consistency within the vehicle, which in practice facilitates the adaptation process and reduces the risk of immobilizer issues. This is particularly important in modern systems where the engine control unit is closely linked to other comfort and safety modules.

Benefits of using a pre-owned control module

Choosing a pre-owned ECU kit for a Mercedes W204 is a solution that allows you to combine reasonable costs with maintaining the vehicle's original electronic architecture. This type of kit:

• enables the restoration of proper diesel engine operation without the need for costly replacement of the entire control system,
• ensures the preservation of the factory logic of the powertrain,
• is an attractive alternative to new components for post-accident repairs or after electronic failure.

Thanks to this, the product will prove useful both in workshops specializing in the Mercedes brand and for informed users looking for a technically matched solution for their C200CDI BlueEFFICIENCY unit.

Compatibility, replacement numbers, and OEM selection

The offered kit belongs to the Electronic control modules and controllers group, which means that compliance with the specific vehicle configuration is of key importance. The controller has an assigned OEM part number and a set of interchangeable numbers that facilitate compatibility verification with a given Mercedes W204.

Before purchasing, it is recommended to compare the markings with the damaged module and verify via the OEM number or the vehicle's VIN. This approach minimizes the risk of hardware or software mismatch and allows for efficient installation and potential adaptation in the vehicle.

If you want to deepen your knowledge about the selection and installation of such components, practical tips can be found in the Global Parts guide: Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?.

Characteristics of operation with a diesel engine and automatic transmission

The diesel engine in the BlueEFFICIENCY version requires precise control, especially in terms of fuel dosage, boost pressure, and cooperation with fuel-saving systems. The applied controller is designed to support the diesel unit, which translates into:

• correct control of operating parameters across the full load range,
• coordination with the automatic transmission for smooth gear shifting,
• maintenance of stable idle speed and appropriate throttle response.

As a result, the ECU kit with the key provides a coherent solution for the diesel engine + automatic transmission configuration, which is crucial for maintaining driving comfort and predictable vehicle behavior.

Product condition and service application

The offered kit belongs to the group of used Electronic control modules and controllers, making it particularly useful in service repairs, replacements after electrical damage, or when reconstructing vehicles after collisions. This type of solution allows for the economical restoration of powertrain efficiency while maintaining the manufacturer's original specifications.

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