Audi Q3 8U 2.0 TDI CUVC 150HP Quattro Engine Control ECU 04L907309K Automatic

Audi Q3 8U 2.0 TDI CUVC 150HP Quattro Engine Control ECU Automatic is a factory-original electronic engine control module designed for diesel units paired with an automatic transmission. This component from the Electronic control modules and controllers group is responsible for precise engine management, ensuring stable performance, correct communication with the quattro drive system, and proper integration with the automatic transmission.

Specifications and technical data

• SKU: 04L907309K
• Mark: Audi
• Condition: Used
• OEM Part Number: 04L907309K
• Substitutable numbers: 04L907309K, 04L 907 309 K, 0281030170, 0 281 030 170
• Fuel type: Diesel
• Gearbox type: Automatic
• Category: ECUs & Computer Modules

Purpose and function of the ECU

The engine control unit in the Audi Q3 8U with the 2.0 TDI CUVC unit and quattro drive is a key module responsible for processing signals from sensors and controlling the actuators of the drivetrain. In versions with an automatic transmission, it coordinates engine operating parameters with gear-shifting logic, which translates into smooth acceleration, predictable throttle response, and stable operation in various driving modes.

Using a dedicated ECU allows for maintaining compliance with the vehicle's factory configuration, including safety and comfort systems that communicate with the engine module via data buses. As a result, after proper adaptation, it is possible to restore full functionality of the drivetrain without interfering with the original electronics architecture.

Compatibility with Diesel unit and automatic transmission

The presented controller has been designed to work with a Diesel engine, which means it is matched to the injection characteristics, boost pressure, and exhaust treatment strategies typical for this unit. The module's software and configuration are prepared for the specifics of the 2.0 TDI diesel engine, which facilitates diagnostics and subsequent tuning of service parameters within factory procedures.

At the same time, the module is adapted for vehicles with an automatic transmission, allowing it to correctly interface with the transmission mechatronics and systems responsible for torque management. In practice, this means consistent operation of functions such as downshifts under load, economic and dynamic modes, and integration with the quattro all-wheel-drive system.

Benefits of using an original Audi module

Choosing an ECU from the Audi family allows for maintaining consistency with the vehicle's factory specification, which is particularly important for advanced electronic systems. A properly selected module:

• maintains correct communication with other controllers in the vehicle,
• facilitates diagnostic work using standard service tools,
• reduces the risk of errors resulting from software or configuration mismatches,
• allows for maintaining predictable engine and transmission operating parameters.

For workshops specializing in the Audi brand and users who care about technical repair accuracy, using the correct module from the Electronic control modules and controllers group is an essential element of professional vehicle maintenance.

Condition, origin, and use in service practice

The offered controller comes from dismantling and is marked as used, making it an attractive cost-effective solution while maintaining factory specifications. Such modules are frequently used in professional service centers for:

• post-accident repairs, when the original controller has suffered mechanical damage or water ingress,
• resolving communication problems within the vehicle network,
• restoring drivetrain efficiency after an engine electronics failure.

Before installation, it is recommended to perform full diagnostics and carry out adaptation procedures in accordance with the vehicle manufacturer's guidelines to ensure the module is correctly assigned to the specific Audi Q3 8U unit.

Expanding knowledge about electronic modules

If you are planning a comprehensive repair or upgrade of the engine area in your Audi and need other components from the same group, such as engine controllers, comfort modules, or drive management units, check the available parts in the Audi electronic control modules and controllers category.

For a better understanding of how modern control modules work and how to use salvaged parts in advanced electronic systems, it is worth checking out our guide material. Practical tips on diagnostics, programming, and safe selection of used controllers can be found in the article Driving pleasure for years – how to take care of iDrive systems and electronic modules in BMW 3 and 5 series models using salvaged parts?, which discusses universal principles of working with automotive electronics.

If you are interested in a broader context of using used components in premium vehicles, including Audi, you may also find the guide on restoring efficiency to older models using salvaged modules helpful, available at the link The second life of a youngtimer – how used car parts rejuvenate cars from the 1998–2012 model years.