Mercedes W204 C350 CDI OM642.834 265HP BE Engine ECU Kit A6421508900 Automatic

Mercedes W204 C350 CDI OM642.834 265HP BE Engine ECU Kit is an advanced electronic set designed for the OM642.834 unit with 265 HP and an automatic transmission. This product from the Electronic control modules and controllers category ensures precise management of the diesel engine's operation, stable communication with the vehicle's electrical system, and the possibility of professional powertrain repair without the need for a costly engine replacement.

Specifications and technical data

• SKU: A6421508900-9
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A6421508900
• Substitutable numbers: A6421508900, A 642 150 89 00, 0281016656, 0 281 016 656, A2079052600, A 207 905 26 00
• Fuel type: Diesel
• Gearbox type: Automatic
• ECU type: Engine Control Unit
• Category: ECUs & Computer Modules

Application and compatibility

The presented ECU kit is intended for the Mercedes C-Class W204 C350 CDI model with the OM642.834 engine and an automatic transmission. It is responsible for controlling diesel engine operating parameters, such as fuel dosage, boost pressure, and strategy for various driving modes. By matching the specific powertrain configuration, it ensures operational consistency with other vehicle modules and correct integration with the electrical system.

The engine control unit kit is particularly useful in the event of an original module failure, communication issues within the vehicle network, or damage caused by power surges. Proper selection based on the OEM number and interchangeable part numbers allows for maintaining hardware and software compatibility with the factory vehicle configuration.

Technical characteristics of the ECU kit

This is an Engine Control Unit dedicated to a diesel-powered engine, compatible with an automatic transmission. The controller manages, among other things, the injection process, combustion control, and communication with other modules responsible for safety and driving comfort. The applied electronic architecture enables precise control of the powertrain unit across the full range of loads.

As an item from the Electronic control modules and controllers group, the ECU kit is designed to operate in the demanding thermal and electrical conditions of the engine bay. The appropriate design of the motherboard and protection circuits minimizes the risk of interference and supports the stability of the entire powertrain system.

Condition, installation, and benefits of use

The product is offered as used, which allows for a significant reduction in repair costs compared to purchasing a new controller while maintaining the functionality required for daily operation. In practice, this means the ability to restore vehicle performance within a reasonable service budget.

Before installation, it is recommended to:

• verify compatibility using the OEM number and reference numbers,
• select based on the specific OM642.834 engine version and automatic transmission configuration,
• entrust the coding and adaptation of the controller to a specialized service center.

This approach increases the chances of seamless integration with the vehicle's system, correct operation of onboard systems, and the absence of diagnostic errors.

Technical support and selection of used electronics

In the case of ECU modules, correct matching based on part numbers, software versions, and engine accessory configuration is crucial. To better understand the principles of selecting used controllers, HW/SW compatibility issues, and typical installation procedures, it is worth reading the guide: Used automotive electronics – second-hand ECU modules and sensors. The article discusses practical examples, frequently asked questions, and tips for safely purchasing electronics from the secondary market.

Related products from the same group

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, powertrain management modules, or systems working with the ECU, check the available parts in the Mercedes electronic control modules and controllers category.