Audi Q3 F3 Oxygen NOX Sensor Module Control Unit 2.0 TDI 05L907807AF

Audi Q3 F3 Module Lambda NOX Sensor 2.0 TDI is a specialized exhaust system component designed for Audi diesel engines paired with an automatic transmission. It is responsible for precisely measuring exhaust gas composition and nitrogen oxide content, enabling the engine control unit to maintain stable, economical, and more environmentally friendly engine operation. By preserving the original signal characteristics, the module ensures proper integration with the exhaust gas purification system in the Audi Q3 F3 2.0 TDI.

Specifications and technical data

• SKU: 05L907807AF
• Mark: Audi
• Condition: Used
• OEM Part Number: 05L907807AF
• Substitutable numbers: 05L907807AF, 05L 907 807 AF, 05L907807CF, 05L 907 807 CF, 0281008253
• Fuel type: Diesel
• Gearbox type: Automatic
• Category: Oxygen Sensors

Function and Role of the NOX Sensor in Audi Q3 F3 2.0 TDI

The presented module, integrated with a NOX lambda sensor, operates within the exhaust gas stream, monitoring their composition in real-time. Based on signals from the sensor, the engine control unit adjusts fuel injection, injector operation, and exhaust gas purification strategy, resulting in:

• stable diesel engine operation across a wide range of loads,
• maintenance of appropriate emission parameters in the exhaust system,
• improved collaboration with the nitrogen oxide reduction system,
• reduced risk of the unit entering limp-home mode.

For modern 2.0 TDI units used in the Audi Q3 F3, a properly functioning NOX sensor is crucial for meeting emission requirements and for the correct operation of the automatic transmission, which utilizes engine load data.

Category: Lambda Sensors and O2 Sensors

This component belongs to the Lambda Sensors and O2 Sensors group, which are responsible for measuring exhaust gas parameters and transmitting them to the control electronics. For diesel engines, the NOX sensor performs an expanded function compared to a classic lambda sensor, providing more complex information about the composition of exhaust gases. This is particularly important in vehicles equipped with advanced exhaust gas purification systems, where measurement accuracy impacts the lifespan of other system components.

Intended for Diesel Engines and Automatic Transmissions

The module is designed to work with Diesel engines, meaning its measurement characteristics are adapted to the specifics of diesel fuel combustion and the higher nitrogen oxide content in exhaust gases. Its application in conjunction with an automatic transmission means that data from the sensor is also used in selecting gear shift strategies to maintain smooth driving and appropriate dynamics while controlling emissions.

Condition and Benefits of Choosing a Used Module

The offered module is a used part, allowing for economical repair of the exhaust system while maintaining the original manufacturer's specifications. Choosing this solution is particularly beneficial when you prioritize:

• maintaining factory compatibility with Audi electronics,
• reducing service costs while ensuring proper engine operating parameters,
• the ability to quickly replace a damaged sensor without software intervention in the control unit.

Prior to installation, computer diagnostics and electrical system verification are recommended to ensure proper integration of the module with the vehicle's existing system.

Selection by Part Numbers and Technical Support

Due to the specific nature of electronics in modern Audi vehicles, it is advisable to use OEM designations and interchangeable part numbers when selecting a NOX sensor to avoid hardware and software compatibility issues. A detailed discussion of the principles for selecting used modules and sensors, including HW/SW compatibility and practical installation examples, can be found in the Global Parts guide: Used Automotive Electronics – How to Safely Choose Used ECU Modules and Sensors.

If you are planning a comprehensive repair or upgrade of the exhaust system area in your Audi and require other parts from the same group, such as control sensors, diagnostic sensors, or additional oxygen sensors, check the available parts in the Audi Lambda Sensors and O2 Sensors category.