Volkswagen Passat CC Engine Control Unit ECU 140HP CFFB 2.0 TDI 03L907309N SET

Volkswagen Passat CC Engine Control Unit ECU 140HP CFFB 2.0 TDI SET is a set from the Electronic control modules and ECUs category, designed for Volkswagen vehicles with a 2.0 TDI diesel engine, 140 HP output, and CFFB engine code, paired with a manual transmission. It is a practical solution for users who need a coherent control set to restore the proper operation of the drivetrain.

Specifications and technical data

• SKU: 03L907309N-3
• Mark: Volkswagen
• Condition: Used
• OEM Part Number: 03L907309N
• Substitutable numbers: 03L907309N, 03L 907 309 N, 0 281 016 374, 0281016374, 3AA937087E, 3AA 937 087 E, 5WK50449, 3C0905843AA, 3C0 905 843 AA
• Gearbox type: Manual
• Part type: Engine Control Unit (ECU)
• Category: ECUs & Computer Modules

Purpose and function of the control set

The presented set is designed as a component of the 2.0 TDI CFFB engine management system in the Volkswagen Passat CC model. It is responsible for coordinating key engine operating parameters, such as fuel dosing, boost control, and communication with other electronic systems of the vehicle. This allows for maintaining stable engine operation, correct throttle response, and proper communication with other modules in the car.

Compatibility and interchangeable part numbers

The control set belongs to the group of original Volkswagen solutions, which facilitates selection based on the specific vehicle configuration. The presence of a dedicated OEM part number and associated interchangeable numbers allows for precise identification in service catalogs and parts selection software, as well as verification of compatibility with your specific Passat CC. This is particularly important when replacing electronic components, where differences in software or hardware versions can affect the proper operation of the entire system.

Manual transmission compatibility

The set is intended for vehicles equipped with a manual transmission, which is significant for how the ECU communicates with other modules and for the logic of driver assistance systems. Proper matching to the transmission type reduces the risk of communication errors, incorrect readings, or adaptation issues after installation. For workshops and users, this means a more predictable replacement process and a higher chance of trouble-free vehicle startup after installation.

Product characteristics and practical application

As an item from the Electronic control modules and ECUs category, this set is primarily intended for service applications – when replacing a damaged ECU, troubleshooting starting issues, unstable engine operation, or communication errors in the vehicle network. The used nature of the product allows for an economical restoration of the car's performance while maintaining compliance with the factory electrical architecture of Volkswagen. In practice, the set will prove useful both in professional workshops specializing in the Volkswagen brand and for informed users who are looking for a complete solution rather than individual, randomly selected modules. A properly selected ECU can significantly facilitate diagnostics, adaptation, and subsequent vehicle operation.

Volkswagen electronic control modules – expansion and selection

If you are planning a comprehensive repair or upgrade of the engine electronics in your Volkswagen and need other components from the same group, such as control modules, engine ECUs, or powertrain management units, check out the available parts in the Volkswagen electronic control modules and ECUs category.

Used ECUs – what to look for

When choosing a used control set for a Passat CC, it is worth paying attention to the compatibility of markings, engine type, transmission type, and vehicle equipment configuration. It is also crucial to carry out the installation and any necessary adaptation in the vehicle correctly, using appropriate diagnostic tools. It is also good practice to familiarize yourself with the principles of electronics selection and typical service procedures beforehand. If you want to better understand when choosing a used engine ECU is justified and how to safely select such an element for your car, check out our guide: The second life of electronics – when is it worth choosing used engine ECUs, comfort modules, and parking sensors?

Summary

Volkswagen Passat CC Engine Control Unit ECU 140HP CFFB 2.0 TDI SET is a practical solution for users and workshops that need a compatible, factory-matched control set for the 2.0 TDI engine with a manual transmission. A properly selected and correctly installed set allows for restoring the proper operation of the drivetrain while maintaining consistency with the original electronic architecture of the vehicle.