Mercedes W245 B200 OM640.941 140HP Engine Control ECU Kit A6401504034 Automatic

Mercedes W245 B200 OM640.941 140HP Engine Control ECU Kit is a professional solution designed for vehicles equipped with an automatic transmission. The kit belongs to the Electronic control modules and ECUs group, which ensures consistent operation with the factory electrical installation and proper communication with other vehicle systems.

Specifications and technical data

• SKU: A6401504034-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6401504034
• Substitutable numbers: A6401504034, A 640 150 40 34, 0281015126, 0 281 015 126, A1695452932, A 169 545 29 32, A1695452108, A 169 545 21 08
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Application and function of the engine control unit

The presented ECU kit is intended for Mercedes W245 B200 models with the OM640.941 engine, where it is responsible for precise control of the power unit's operation. The module manages, among other things, fuel injection, engine auxiliary equipment, and communication with other controllers in the vehicle, which translates into stable performance, predictable throttle response, and correct cooperation with the automatic transmission.

By using an original module from dismantling, compatibility with the factory electronic architecture of the Mercedes is maintained, which reduces the risk of CAN network communication errors and adaptation problems compared to low-quality replacements.

Benefits of using the original ECU kit

In the case of modern Mercedes B-Class vehicles, the consistency of all electronic components is crucial. Using a complete engine control unit kit prepared for cooperation with an automatic transmission allows you to:

• maintain proper synchronization between the engine and the transmission,
• minimize the risk of dashboard errors appearing after replacing the controller,
• preserve the factory performance characteristics of the power unit,
• facilitate the programming and adaptation process at the service center.

This solution is particularly recommended when replacing a damaged controller after an electrical failure or ECU communication problems in vehicles with an automatic transmission.

Integration with the vehicle installation and assembly

The ECU kit has been designed to work with the factory wiring harness of the Mercedes W245 B200, which facilitates installation and limits the need for modifications to the installation. The workshop is responsible for performing appropriate diagnostic procedures, potential coding, and matching to the specific vehicle according to the manufacturer's guidelines.

Before installation, it is recommended to verify the compatibility of the vehicle configuration (engine type, transmission type, additional equipment) and perform a full computer diagnostic to confirm that the engine controller is indeed the cause of the problems, rather than other system components.

Product condition and quality of origin

The offered engine control unit kit comes from a dismantled Mercedes vehicle and is a used item, which provides a favorable compromise between repair costs and maintaining original OEM quality. This type of solution is often chosen by professional workshops specializing in automotive electronics, which value compatibility with factory systems and predictable module behavior after installation.

Expansion of 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 components from the same group, such as additional controllers, engine management modules, or electronic units working with the ECU, check out the available parts in the Electronic control modules and ECUs Mercedes category.

For a comparison of solutions used in other premium brands and a better understanding of how modern control modules work, it is worth reading the guide on iDrive systems and controllers in BMW – you can find it in the article Driving pleasure for years – how to take care of iDrive systems and electronic modules in BMW 3 and 5 series models, where practical aspects of using proven parts from dismantling are discussed.