Mercedes W245 B200 CDI OM640.941 140HP Engine ECU Kit A6401508334 Key

Mercedes W245 B200 CDI OM640.941 140HP Engine ECU Kit A6401508334 Key is a complete, used electronic package designed for the powertrain of the Mercedes B-Class model with the OM640.941 diesel engine. The kit includes the engine control unit with a matched key, facilitating compliance with the factory immobilizer system and ensuring consistent electronic operation. This is a practical solution for workshops and users seeking a tested, original control module for professional repair or replacement.

Specifications and technical data

• SKU: A6401508334
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6401508334
• Substitutable numbers: A6401508334, A 640 150 83 34, 0281015126, 0 281 015 126, A1695452308, A 169 545 23 08, A1695452932, A 169 545 29 32
• Category: ECUs & Computer Modules

Purpose and Function of the Engine ECU Kit

The presented kit belongs to the Electronic Control Units and Controllers group and is dedicated to the powertrain of the Mercedes B-Class W245 generation with the B200 CDI unit. The engine control unit works with the diesel engine's ancillary systems, monitoring fuel injection, the injection system's operation, boost parameters, and key engine protections. The inclusion of a matched key allows for maintaining the integrity of the vehicle's security system without the need for deep intervention in the immobilizer software.

Benefits of Using an Original Control Module

Using an original salvaged control unit in the Mercedes W245 B200 CDI offers a number of practical advantages:

• maintaining the engine's factory operating logic and compatibility with other vehicle modules,
• reducing the risk of CAN network communication problems compared to low-quality aftermarket replacements,
• the ability to restore proper starting and stable operation of the power unit after the previous ECU failure,
• easier adaptation in the vehicle due to the presence of the paired key.

For workshops specializing in the Mercedes brand, such a kit provides a functional basis for professional engine electronics repair, especially in cases of damage from flooding, power surges, or software errors of the previous control unit.

Practical Application in Service

Replacing the engine control unit in modern vehicles requires not only correct physical installation but also proper electronic configuration. The ECU kit with a key for the Mercedes W245 B200 CDI simplifies the service process because:

• it reduces the time needed for immobilizer programming,
• it lowers the risk of conflicts between comfort modules, the instrument cluster, and the engine control unit,
• it facilitates diagnostics – operating parameters can be quickly verified using factory testers.

Thanks to this solution, it is possible to efficiently restore the full functionality of the powertrain, which is important for both post-accident repairs and typical electronic failures.

Condition, Origin, and Vehicle Compatibility

The offered engine ECU kit is an original Mercedes part from dismantling, meaning it was previously used in a vehicle. Such components are often chosen by service centers because they retain factory operating parameters and are structurally matched to the specific engine version. Before installation, a standard diagnostic procedure and verification of compatibility with the specific vehicle configuration are recommended to ensure proper cooperation with other electronic modules.

Expanding Knowledge of Electronic Modules

If you want to better understand how modern engine control units and other modules in premium cars work, it is worth familiarizing yourself with materials on onboard electronics. For example, an article describing the iDrive systems and control units in BMW 3 and 5 Series vehicles provides practical tips on how to effectively use salvaged parts in advanced electronic systems – you can find more information in the text Driving Pleasure for Years – How to Care for iDrive Systems and Electronic Modules in BMW 3 and 5 Series Models.

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 engine control units, power unit management modules, or related electronic systems, check the available parts in the Mercedes Electronic Control Units and Controllers category.