Mercedes W169 W245 A200 B200 CDI OM640.941 140HP Engine Module ECU A6401500734

Mercedes W169 W245 A200 B200 CDI OM640.941 140HP Engine Module ECU is a specialized electronic control unit designed for diesel engines in A-Class and B-Class models with automatic transmissions. This component from the Electronic control modules and controllers category is responsible for precise engine management, ensuring stable power characteristics and proper integration with vehicle systems. Thanks to its factory design, the ECU is perfectly matched to the specifications of the OM640.941 unit, which facilitates diagnostics and subsequent operation.

Specifications and technical data

• SKU: A6401500734
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6401500734
• Substitutable numbers: A6401500734, A 640 150 07 34, 0281014670, 0 281 014 670
• Fuel type: Diesel
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Purpose and function of the controller

The presented ECU is designed to work with the A200/B200 CDI diesel engine, where it is responsible for controlling combustion parameters, fuel dosage, and synchronization with engine accessories. The module monitors the fuel injection system, sensors, and actuators, which translates into predictable throttle response and proper operation of onboard systems.

In vehicles with an automatic transmission, the controller also plays a vital role in communicating with the transmission module, which affects gear shifting smoothness and the overall refinement of the powertrain. A properly selected ECU helps maintain correct engine operating parameters under various load conditions, while ensuring idle stability and proper cooperation with the vehicle's electronics.

Benefits of using an original ECU

Using a dedicated controller in a diesel engine provides a number of practical operational benefits:

• maintaining the factory performance characteristics of the powertrain,
• consistent cooperation with the automatic transmission system,
• correct operation of engine sensors and actuators,
• easier computer diagnostics based on standard service procedures,
• the ability to restore proper vehicle operation after the failure of the previous module.

For users of A-Class and B-Class models with the OM640.941 unit, choosing the right ECU is crucial for drive stability and predictable vehicle behavior in daily use. Selecting a controller compatible with the factory configuration reduces the risk of communication issues between modules and facilitates future servicing.

Product characteristics and application

The offered controller belongs to the Electronic control modules and controllers group, meaning it is an integral part of the vehicle's electrical architecture. It operates within the diesel fuel system environment, where it must correctly interpret signals from sensors and generate appropriate commands for injectors and other components. Proper matching of the module to the specific engine and transmission version has a direct impact on driving comfort and performance consistency.

Before installation, it is recommended to perform professional vehicle diagnostics and verify the module's compatibility with the car's configuration, including the software and equipment of the specific unit. In many cases, adaptation or programming of the controller using appropriate service tools is necessary, which allows for full integration of the ECU with other vehicle systems.

Selection, installation, and technical aspects

When selecting a controller for a specific vehicle, it is worth using the manufacturer's markings and information from diagnostics to avoid software incompatibilities. A properly selected module allows for maintaining configuration consistency, which is particularly important in cars with advanced onboard electronics.

The installation process itself should be carried out by a workshop experienced in working with automotive electronics. Proper connection, securing of wiring harnesses, and potential coding of the controller affect the reliability of the entire system. Professional installation and ECU configuration minimizes the risk of errors, fault messages, and engine starting problems.

Expansion of the control system in Mercedes vehicles

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 control modules, auxiliary system controllers, or electronic powertrain management units, check out the available parts in the Mercedes Electronic control modules and controllers category.

More about the role of original modules in modern cars

In premium vehicles, such as Mercedes or Audi, maintaining electronic consistency has a direct impact on driving characteristics and user comfort. If you are interested in how properly selected, original modules and electronic components help maintain a car's factory properties, it is worth reading an article describing the importance of precisely selected components for the Audi brand: Audi and pure emotion – how used parts help maintain the brand's DNA.