Mercedes W212 E250CDI 204HP OM651.924 Engine ECU Kit Key A6519005301 Automatic

Mercedes W212 E250CDI 204HP OM651.924 Engine ECU Kit Key is a specialized set designed for the OM651.924 unit paired with an automatic transmission. This product from the Electronic control modules and ECUs category allows for the professional replacement of damaged powertrain electronics while maintaining proper communication with other vehicle systems.

Specifications and technical data

• SKU: A6519005301-11
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6519005301
• Substitutable numbers: A6519005301, A 651 900 53 01, A6519013301, A 651 901 33 01
• Fuel type: Diesel
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Application and compatibility

The presented ECU kit with key is intended for the Mercedes E-Class W212 generation in the E250 CDI version with 204 HP, equipped with the OM651.924 diesel engine and an automatic transmission. This type of set is particularly useful when replacing a damaged engine control unit in vehicles where maintaining consistency between the powertrain electronics, immobilizer, and other comfort and safety modules is crucial.

By maintaining compatibility with the specific powertrain configuration (diesel + automatic transmission), the set helps reduce the risk of engine starting issues, CAN bus communication errors, or malfunctions related to powertrain functions.

Technical characteristics of the ECU kit

The engine control unit kit with key has been designed as a component that works with the factory electronic architecture of the Mercedes W212. It is responsible for:

• managing the operation of the diesel unit, including fuel dosing and engine accessory control,
• cooperating with the automatic transmission regarding load and torque information transfer,
• communicating with safety and comfort systems via the data bus,
• integrating with the immobilizer system thanks to the included key.

The presence of a matched key facilitates the adaptation process in the vehicle, which in many cases shortens the time required for diagnostics and configuration compared to installing a single ECU that requires full programming from scratch.

Benefits of using a pre-owned ECU kit

Choosing a pre-owned engine control unit kit with key for the Mercedes W212 E250 CDI is often a cost-effective solution while maintaining high functionality. This type of set allows you to:

• restore powertrain efficiency after an engine electronics failure,
• minimize costs compared to purchasing a new ECU from an authorized service center,
• reduce vehicle downtime thanks to the ready-to-use ECU + key set,
• maintain configuration consistency for the OM651.924 unit with an automatic transmission.

Due to the nature of the product in the Electronic control modules and ECUs category, it is recommended to verify vehicle configuration compatibility and perform professional computer diagnostics before installation.

Professional installation and electronics selection

To fully utilize the potential of the offered set, it is worth entrusting the installation to a specialized service center that has experience working with Mercedes electronics and immobilizer systems. Proper selection and configuration of the ECU have a direct impact on engine stability, smooth gear shifting in the automatic transmission, and the correct operation of onboard functions.

If you want to better understand when choosing a pre-owned engine control unit is a reasonable solution and what to look for when purchasing, check out our guide: Second life for electronics – when is it worth choosing pre-owned engine ECUs, comfort modules, and parking sensors?

Other electronic control modules for Mercedes

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