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

Mercedes W169 W245 A200 B200 CDI OM640.941 140HP Engine ECU Kit Key A6401500734 is a complete engine control unit kit with a key, designed for A-Class and B-Class models with the OM640.941 diesel engine. The kit comes from the Electronic Control Modules and Controllers group, ensuring consistent powertrain operation and proper communication with other vehicle systems. This is a solution for users seeking proven, factory engine control for Mercedes vehicles.

Specifications and technical data

• SKU: A6401500734-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6401500734
• Substitutable numbers: A6401500734, A 640 150 07 34, 0281014670, 0 281 014 670, A1695451908, A 169 545 19 08, A1695452932, A 169 545 29 32, KZ
• Category: ECUs & Computer Modules

Purpose and Function of the ECU Kit with Key

The presented engine control unit kit with a key is dedicated to Mercedes A-Class W169 and B-Class W245 vehicles in A200 CDI and B200 CDI versions with the 140 HP OM640.941 engine. As an element from the Electronic Control Modules and Controllers group, it is responsible for managing the powertrain's operation, including fuel delivery, boost control, and cooperation with safety and comfort systems.

The combination of the control unit with a matched key ensures the integrity of the immobilizer system, simplifying the replacement process compared to a single module. This solution helps reduce diagnostic time and the risk of authorization issues for starting.

Benefits of Using an Original Mercedes Module

Using an original control module in Mercedes vehicles offers a range of practical benefits:

• maintaining factory engine control logic,
• consistent cooperation with the electrical system and other modules in the vehicle,
• reducing the need for wiring or software modifications,
• easier diagnostics using standard service tools.

For workshops and users, this means a more predictable installation process and a higher chance of quickly restoring full powertrain functionality. Factory engine control also promotes stable CDI unit operating parameters in the long term.

Application in Service Practice

The ECU kit with a key is particularly useful in situations where the existing control unit has suffered electronic damage, there are communication problems on the bus, or starting difficulties arise due to inconsistencies between the module and the immobilizer. The complete package facilitates repairs without the need for deep software intervention.

This solution is often chosen by workshops specializing in the Mercedes brand, which are looking for compatible electronic modules for quick test or final replacement. This effectively reduces vehicle downtime in the workshop.

Condition and Compatibility Verification

The product is offered as a used electronic module, allowing for economical repair while maintaining original manufacturer specifications. Before purchasing, it is recommended to verify compatibility with your specific vehicle version, particularly regarding the control unit generation and the OM640.941 engine configuration in your particular car.

If you have any doubts about the fit, it is advisable to consult a car electrician or diagnostician who can assess the possibility of using the kit in your car and plan any necessary coding or adaptation.

Expanding Mercedes Control Systems

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 units, comfort modules, or engine management units, check the available parts in the Mercedes Electronic Control Modules and Controllers category.

To compare solutions used in other premium brands and to better understand the specifics of modern electronic module operation, it is worth reading the article describing the operation of iDrive systems and control units in BMW – details can be found in the entry Years of Driving Pleasure – How to Care for iDrive Systems and Electronic Modules in BMW 3 and 5 Series Models Using Used Parts?.