Mercedes W203 220CDI OM646.963 150HP Engine Unit ECU Kit A6461509777 Key Lock

Engine Control Unit (ECU) Kit with Key and Lock for Mercedes W203 220 CDI OM646.963 150 HP is a practical solution for workshops and users who need a tested engine electronics set for a diesel unit. The kit comes from a vehicle with an automatic transmission, which facilitates adaptation to specific drive configurations. By maintaining the consistency of components within a single kit, you minimize the risk of startup and vehicle network communication problems.

Specifications and technical data

• SKU: A6461509777-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6461509777
• Substitutable numbers: A6461509777, A 646 150 97 77, 0 281 014 661, 0281014661, A2095453908, A 209 545 39 08
• Fuel type: Diesel
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Purpose and Function of the ECU Kit

The Mercedes W203 220 CDI OM646.963 150 HP – ECU Kit is designed to manage a diesel engine unit in an automatic transmission configuration. The kit is responsible for precise engine operation control, fuel delivery, cooperation with the injection system, and communication with other vehicle modules.

The kit includes the electronic engine control module along with immobilizer components (key and lock), which ensures coding consistency and simplifies adaptation in the vehicle. This solution is particularly beneficial when replacing a damaged control unit, as it minimizes the need for additional programming procedures.

Benefits of Using a Used ECU Kit

Choosing a used engine control unit set for a Mercedes C-Class W203 generation is a sensible compromise between cost and functionality. A kit from a single vehicle:

• ensures consistency between engine electronics and immobilizer,
• reduces the time required for configuration and adaptation,
• lowers the risk of software incompatibility between modules.

As a component from the Electronic Control Units and Controllers group, the kit is crucial for the proper operation of the powertrain, especially in cars with automatic transmissions and diesel engines. A used component allows for restoring vehicle functionality without the need to invest in a new, significantly more expensive control unit.

Selection, Compatibility, and Installation

To correctly select this ECU kit for a specific Mercedes W203 model, it is recommended to verify compatibility by part number and engine and transmission configuration. Comparing hardware and software designations with the original vehicle control unit is also helpful. Proper selection minimizes the need for additional programming and speeds up the installation process.

The installation of the kit itself requires standard workshop procedures: dismantling the old control unit, replacing the lock and adapting the key, and then performing basic diagnostic procedures. In many cases, if the configuration is compatible, a near plug-and-play solution can be achieved, reducing vehicle downtime.

For those who wish to deepen their knowledge on selecting and installing used control units, a helpful guide is available: check how to safely choose and install used ECU modules and sensors.

Application in Vehicles with Diesel Engines and Automatic Transmissions

The presented kit is designed for diesel units, meaning the control maps are adapted to the characteristics of a diesel engine – including fuel delivery, turbocharger operation, and interaction with the exhaust gas aftertreatment system. Integration with the automatic transmission allows for proper data exchange between the engine control unit and the transmission module, which translates to smooth gear changes and stable drive operation.

If you are also looking for other electronic components for your vehicle, you can browse the full offer in the Electronic Control Units and Controllers – Used Parts Offer{data-blogs=category} section to select additional modules that work with the powertrain.

Summary

The ECU Kit with Key and Lock for Mercedes W203 220 CDI OM646.963 150 HP is a practical service solution for vehicles with diesel engines and automatic transmissions. The kit allows for efficient replacement of a damaged control unit, maintaining electronic consistency and limiting the scope of necessary programming work. It is a functional offering for workshops and users who expect a technically matched, ready-to-install engine electronics kit.