Mercedes W204 C200 CDI OM651.913 Engine ECU Kit Ignition Key Lock A6511500126

The Engine Control Unit (ECU) with key set for Mercedes W204 C200 CDI BlueEFFICIENCY with OM651.913 unit is a precisely selected kit from the Electronic Control Modules and Controllers group, designed for vehicles with diesel engines and automatic transmissions. The use of an original control module with a matched key allows for efficient restoration of proper powertrain and security electronics operation in a Mercedes vehicle.

Specifications and technical data

• SKU: A6511500126-2
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6511500126
• Substitutable numbers: A6511500126, A 651 150 01 26, A0054469240, A 005 446 92 40, A2075450108, A 207 545 01 08, A2045458132, A 204 545 81 32
• Fuel type: Diesel
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Purpose and Function of the ECU Set

The presented engine control unit set is dedicated to the Mercedes C-Class W204 generation, specifically the C200 CDI BlueEFFICIENCY version with the OM651.913 engine. The ECU module is responsible for advanced control of the diesel engine's operation, including fuel injection, combustion parameter control, and cooperation with the automatic transmission, which translates to stable powertrain performance. The inclusion of a matched key in the set facilitates integration with the factory immobilizer system, which is particularly important when replacing the control unit in modern vehicles where security electronics are closely linked to the engine module.

Benefits of Using an Original Control Module

Using an original electronic control module in a Mercedes W204 ensures:

• preservation of factory engine control maps for the diesel engine,
• proper cooperation with the automatic transmission and other vehicle systems,
• consistency with the existing electrical architecture and in-vehicle network communication. This helps to minimize compatibility issues that often arise when using incorrectly selected control units. The correct selection of an item from the Electronic Control Modules and Controllers category is crucial for stable powertrain operation and service diagnostics.

Integration with Diesel System and Automatic Transmission

The BlueEFFICIENCY diesel engine requires precise control to maintain proper combustion parameters, dynamics, and fuel consumption. The presented ECU set is configured to work with the diesel unit and automatic transmission, allowing for:

• smooth gear changes while maintaining appropriate torque,
• coordination of engine and transmission operation in various driving modes,
• proper handling of functions related to powertrain efficiency. Such matching is particularly important for vehicles where the engine control unit acts as the central element managing communication between powertrain components.

Performance Characteristics and Item Condition

The offered ECU set with key comes from a used vehicle, allowing for an economical restoration of engine control system functionality while maintaining the original manufacturer's specifications. A used module with preserved functionality is often chosen by professional automotive electronics workshops, especially for modern diesel engines. Choosing such a set is beneficial both for repairs after a control unit failure and when electronics need to be matched after an engine unit replacement in a Mercedes W204 C200 CDI BlueEFFICIENCY.

Expanding the Control System in a Mercedes

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other parts from the same group, such as additional controllers, comfort modules, or powertrain management units, check the available parts in the Mercedes Electronic Control Modules and Controllers category.

More About the Role of Original Modules in Modern Cars

In modern premium cars, such as Mercedes or Audi, maintaining electronic consistency directly impacts the driving experience and vehicle functionality. If you are interested in how original modules and electronic components help preserve the factory characteristics of premium brands, it is worth reading the article Audi and Pure Emotion. How Used Parts Help Maintain Brand DNA?, which illustrates the importance of appropriately selected used parts.