Audi A3 8P 1.4 TFSI CAXC 125HP Engine Control Unit ECU 03C906016S Manual

Audi A3 8P 1.4 TFSI CAXC 125HP Engine Control Unit ECU is a factory electronic control module designed for the petrol engine paired with a manual transmission. This used Engine Control Unit ensures precise engine management, allowing for the restoration of proper powertrain functionality following the failure of the original unit.

Specifications and technical data

• SKU: 03C906016S
• Mark: Audi
• Condition: Used
• OEM Part Number: 03C906016S
• Substitutable numbers: 03C906016S, 03C 906 016 S, 0261S04859, 0 261 S04 859
• Fuel type: Petrol
• Gearbox type: Manual
• ECU type: Engine Control Unit
• Category: ECUs & Computer Modules

Purpose and function of the engine control unit

The presented control unit is an item from the Electronic control modules and ECUs category, responsible for comprehensive management of the petrol engine in the Audi A3 8P with the 1.4 TFSI CAXC unit. The module oversees, among other things, fuel injection, ignition, and interaction with engine peripherals, adjusting operating parameters to current load conditions and the driver's driving style.

The version designed for a vehicle with a manual transmission is optimized for the drivetrain's characteristics, which allows for stable operation of the power unit across the full RPM range. Using an original ECU helps maintain software consistency with the vehicle's other systems.

Benefits of using an original ECU

Using a factory engine control unit in the Audi A3 8P 1.4 TFSI CAXC allows for maintaining compliance with the vehicle's factory electronic architecture. A properly selected ECU facilitates the adaptation and programming process, and minimizes the risk of communication errors with other modules in the vehicle's network.

The main advantages of using this type of control unit include:

• maintaining stable petrol engine operating parameters under various operating conditions,
• proper cooperation with the manual transmission,
• possibility of diagnostics and software updates using standard service tools,
• preservation of factory safety and power unit protection strategies.

Condition, selection, and compatibility

The offered engine control unit is a used item, which in practice allows for an economical repair of the control system while maintaining the manufacturer's original specifications. When selecting an ECU for the Audi A3 8P 1.4 TFSI CAXC, it is recommended to verify compatibility by OEM number and interchangeable numbers, as well as to check the hardware and software version in the context of the specific vehicle configuration.

To better understand the principles of selecting and installing used electronic modules, it is worth using a guide dedicated to this topic. Detailed information on verifying compatibility, selection by VIN and part numbers, and practical aspects of installation can be found in the article Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?.

Application in the Audi powertrain

The engine control unit dedicated to the Audi A3 8P 1.4 TFSI CAXC works with the petrol supply system and manual transmission, coordinating the operation of components to achieve appropriate dynamics and engine refinement. A properly selected ECU supports the maintenance of stable idle speed, smooth acceleration, and correct response to load changes.

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, engine management modules, or related electronic systems, check the available parts in the Audi electronic control modules and ECUs category.

Summary

Audi A3 8P 1.4 TFSI CAXC 125HP Engine Control Unit ECU is a practical solution for users looking for an original ECU module for a petrol engine paired with a manual transmission. A used, functional module from the electronic control units category allows for restoring the proper operation of the powertrain, while maintaining factory control logic and compatibility with the vehicle's other systems.