Audi A4 B8 2.0 TDI Diesel CAHA 170HP Engine ECU Kit Ignition + Key 03L906022MK

Audi A4 B8 2.0 TDI Diesel CAHA 170HP Engine ECU Kit Ignition + Key is a complete, used set from the Electronic control modules and controllers group, designed for diesel units paired with a manual transmission. This is a solution for users who need a proven, factory-spec engine control system that maintains the original performance characteristics of the powertrain.

Specifications and technical data

• SKU: 03L906022NP-1
• Mark: Audi
• Condition: Used
• OEM Part Number: 03L906022NP
• Substitutable numbers: 03L906022NP, 03L 906 022 NP
• Fuel type: Diesel
• Gearbox type: Manual
• Category: ECUs & Computer Modules

Purpose and function of the ECU kit

The presented engine control unit kit is dedicated to Audi vehicles with a 2.0 TDI diesel engine, engine code CAHA, 170 HP, equipped with a manual transmission. As an item from the Electronic control modules and controllers category, it is responsible for precise management of the powertrain – from fuel dosing and boost control to monitoring operating parameters under various load conditions.

Using a complete kit allows for maintaining electronic consistency in the vehicle, which is particularly important when replacing the controller in modern diesel systems. This minimizes the risk of communication issues between modules and facilitates the adaptation process in the vehicle.

Benefits of using an original diesel kit

Diesel engines, such as the 2.0 TDI CAHA, require precise control of injection and boost pressure, which is why using a factory ECU kit is crucial for maintaining proper engine refinement. A correctly selected control module:

• ensures stable cold and warm starts,
• maintains proper combustion parameters across the entire rev range,
• works with the manual transmission in accordance with factory load maps,
• enables proper operation of the vehicle's diagnostic systems.

For the user, this means predictable vehicle behavior, easier diagnostics, and the possibility of further service maintenance in accordance with the manufacturer's procedures.

Practical application in service

This type of kit is particularly useful in situations where the existing engine computer has been damaged, communication issues occur on the bus, or persistent errors related to the powertrain electronics appear. Replacing it with a complete, original module often allows for reducing the time spent troubleshooting and restores proper engine operation without the need for deep interference with the wiring harness or other components.

Combined with proper diagnostics and matching based on OEM numbers and vehicle data, such a kit provides an effective solution both for workshops specializing in the Audi brand and for informed users overseeing repairs themselves.

Selection, compatibility, and technical support

When selecting an engine computer for the Audi A4 B8 2.0 TDI CAHA, it is crucial to pay attention to compatibility with the fuel type, transmission type, and vehicle electronics parameters. A properly selected ECU kit limits the need for additional modifications and allows for efficient adaptation in the vehicle.

If you want to deepen your knowledge on how to safely select used control modules and other electronic components, it is worth checking out the Global Parts guide: Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?. There, you will find practical tips regarding selection by OEM numbers, hardware and software compatibility, and the most frequently asked questions related to installation.

Expanding the control system in Audi

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 additional controllers, auxiliary modules, or powertrain management systems, check out the available parts in the Audi electronic control modules and controllers category.