Audi A3 8P CAXC 1.4 TFSI 125HP Petrol Engine Control Unit ECU 03C906022AN Manual

Audi A3 8P CAXC 1.4 TFSI 125HP Petrol Engine Control Unit ECU is an original electronic control module designed for the 125HP CAXC unit with a manual transmission. This used, fully functional ECU ensures precise engine management, supporting stable power output, smooth acceleration, and proper cooperation with vehicle components. By maintaining the factory electronics architecture, this is a particularly beneficial solution for drivers who want to preserve the characteristic driving properties of their Audi.

Specifications and technical data

• SKU: 03C906022AN
• Mark: Audi
• Condition: Used
• OEM Part Number: 03C906022AN
• Substitutable numbers: 03C906022AN, 03C 906 022 AN, 03C906022, 03C 906 022, 0261S04394, 0 261 S04 394
• Fuel type: Petrol
• Gearbox type: Manual
• Category: ECUs & Computer Modules

Purpose and function of the ECU

The presented electronic engine control module has been designed to work with the TFSI petrol unit in the Audi A3 8P, in a configuration with a manual transmission. The ECU is responsible for controlling key engine operating parameters, such as fuel dosage, ignition timing, and response to sensor signals, which translates into stable operation and predictable vehicle behavior in various road conditions.

The module belongs to the Electronic control modules and ECUs category, meaning it integrates with the existing vehicle installation and works with other onboard systems. Using an original controller allows for maintaining software and hardware consistency, reducing the risk of communication errors within the vehicle network.

Benefits of using an original Audi controller

Using a factory ECU in an Audi A3 8P with a CAXC 1.4 TFSI engine brings a number of practical benefits:

• maintaining engine performance characteristics in accordance with the manufacturer's specifications,
• proper cooperation with the manual transmission and safety systems,
• reduced risk of compatibility issues compared to aftermarket replacements,
• easier diagnostics using factory service tools,
• the ability to restore stable engine operation after the failure of a previous controller.

For users who want to maintain the consistency of handling and throttle response, the original ECU module is a technically safe and predictable solution in operation.

Integration with the petrol system and manual transmission

The controller has been configured to work with the TFSI petrol engine, which means adjusting ignition and injection maps to the specifics of this unit. This allows for effective use of turbocharging while maintaining proper operating culture and fuel consumption control. The ECU works with sensors and actuators typical for this powertrain configuration.

Adaptation to the manual transmission guarantees correct handling of signals related to gear changes, idle speed, and clutch engagement response. This is important for both driving comfort and the durability of mechanical components, as the controller coordinates engine load depending on the current gear.

Condition, origin, and practical application

The offered controller belongs to the group of used Electronic control modules and ECUs, which allows for significantly reducing repair costs compared to purchasing a new part, while maintaining the original specification. This solution is particularly beneficial when replacing a damaged ECU after failure, water damage, or incorrect software interference.

In practice, the module will work well both as a repair component and as a base for further configuration in a specialized service center that deals with programming Audi controllers. Thanks to the factory design, it is possible to adjust parameters to a specific vehicle according to user requirements and manufacturer guidelines.

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 engine controllers, comfort modules, or auxiliary system management units, check the available parts in the Audi electronic control modules and ECUs category.

Maintaining the Audi character and additional information

For many drivers, it is crucial to maintain the brand's typical power delivery, throttle response, and overall "feeling" of the car. That is why it is so important to use original electronic modules that work with other systems according to factory assumptions. You can find more about how used components help maintain the consistency of the driving experience in the article Audi and emotions in their purest form. How do used parts help maintain the brand's DNA?.