Audi A7 4G C7 3.0 TDI CDUD 245HP Quattro Engine Module ECU 4G0907401S Automatic

Audi A7 4G C7 3.0 TDI CDUD 245HP Quattro Engine Module ECU is a factory-original engine control unit designed for all-wheel drive versions with an automatic transmission. As a component from the Electronic control modules and controllers group, it is responsible for the precise management of the diesel engine, ensuring proper injection parameters, boost pressure, and engine protection. This is a solution for users who want to maintain the characteristic dynamics of an Audi while ensuring compatibility with the factory electronic architecture.

Specifications and technical data

• SKU: 4G0907401S-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 4G0907401S
• Substitutable numbers: 4G0907401S, 4G0 907 401 S, 4G0907401, 4G0 907 401, 0281019322, 0 281 019 322
• Fuel type: Diesel
• Gearbox type: Automatic
• ECU type: Engine Control Unit
• Category: ECUs & Computer Modules

Purpose and function of the engine controller

The presented controller is dedicated to the 3.0 TDI unit in the Audi A7 4G C7 generation with Quattro drive and an automatic transmission. As an Engine Control Unit, it integrates signals from engine sensors, the fuel injection system, and the drivetrain, subsequently controlling component operation in real-time. This enables the maintenance of stable power, smooth acceleration, and proper interaction with safety and comfort systems.

A properly selected engine controller is crucial for:

• correct starting of the diesel unit under various operating conditions,
• maintaining appropriate torque across the entire rev range,
• coordination of operation with the automatic transmission and Quattro drive,
• exhaust emission control in accordance with factory manufacturer settings.

Compatibility and selection by part numbers

The controller belongs to the group of original Audi components, which facilitates matching it to a specific vehicle configuration. Selection is based on the OEM part number and available interchangeable numbers, allowing for precise verification of compatibility with a given engine version, model year, and vehicle equipment. This identification method minimizes the risk of CAN network communication issues, equipment operation errors, or malfunctions of comfort functions.

Before purchasing, it is recommended to compare the controller markings with the vehicle data or use VIN-based selection to ensure that the module will work with the existing electrical installation and software in the car.

Operating characteristics in a diesel engine with an automatic transmission

The 3.0 TDI unit in the Audi A7 requires a controller optimized for the specifics of a diesel engine and cooperation with an automatic transmission. The engine ECU module used here manages, among other things, fuel dosing, boost pressure, exhaust gas recirculation operation, and communication with the transmission module. This enables:

• smooth gear shifting without jerking,
• maintaining appropriate engine refinement at both low and high RPMs,
• preservation of factory performance parameters and fuel consumption,
• consistent cooperation with driver assistance systems.

A controller configured in this way allows for maintaining the combination of driving comfort and dynamic throttle response characteristic of Audi, which is particularly important in the A7 class model.

Condition, origin, and advantages of using a used part

The offered module belongs to the group of used parts, which allows for reducing repair costs while maintaining the original manufacturer's specifications. In practice, this means the ability to restore full functionality of the drivetrain without the need to resort to replacements of uncertain quality. A used factory controller is often better matched to the specific software generation and electrical architecture than new universal equivalents.

More about how original second-hand components help maintain the brand's character can be found in the article Audi and emotions in their purest form – how used parts help maintain the brand's DNA, where practical examples of using controllers and other equipment elements are described.

Expansion of the control system in an Audi

If you are planning a comprehensive repair or upgrade of the engine area in your Audi and need other elements from the same group, such as additional controllers, drivetrain management modules, or units responsible for communication with the engine, check the available parts in the Audi electronic control modules and controllers category.

Using original modules within a single vehicle allows for maintaining software consistency, reducing the number of diagnostic errors, and facilitates future servicing in specialized workshops.