NOX Sensor Volkswagen Tiguan 5N Audi Q2 GA Diesel Lambda Probe 04L907805DF

NOX Sensor Volkswagen Tiguan 5N Audi Q2 GA Diesel Lambda Probe is a specialized component from the Lambda Sensors and O2 Sensors group, designed for diesel engine exhaust systems. It is responsible for precise measurement of nitrogen oxides in exhaust gases, allowing the engine control unit to effectively manage the combustion process and the exhaust gas aftertreatment system. Thanks to this component, it is possible to maintain stable engine operating parameters and compliance with emission standards.

Specifications and technical data

• SKU: 04L907805DF
• Mark: Audi
• Condition: Used
• OEM Part Number: 04L907805DF
• Substitutable numbers: 04L907805DF, 04L 907 805 DF
• Fuel type: Diesel
• Category: Oxygen Sensors

Function and Role of the NOx Sensor in a Diesel Engine

The NOx sensor in a Diesel engine is a key element of the emission control system, working in conjunction with lambda sensors and other exhaust gas sensors. Based on its signal, the engine control unit corrects the fuel injection quantity, the operation of the injection system, and the regeneration strategy for exhaust gas aftertreatment components. A properly functioning NOx sensor helps reduce fuel consumption, stabilizes engine operation, and lowers the risk of the engine entering limp-home mode.

In vehicles such as the Volkswagen Tiguan 5N or Audi Q2 GA, the use of a dedicated NOx sensor allows for maintaining correct mixture parameters and ensures proper cooperation with the factory control unit software. This is particularly important in modern designs where the exhaust system is tightly integrated with the vehicle's electronics.

Compatibility and Selection by Part Numbers

The presented sensor belongs to the OEM category for Audi, meaning it has been designed for full compatibility with the factory electrical system and operating parameters of the concern's engines. It has a dedicated part number and interchangeable numbers, which facilitates unambiguous identification and selection for a specific vehicle model.

To ensure correct compatibility, it is advisable to:

• compare the part number with the component currently installed in the car,
• verify compatibility using the OEM number in the manufacturer's catalog or parts selection system,
• check if the sensor is intended for an engine with the same fuel type.

This minimizes the risk of communication problems with the engine control unit and diagnostic system errors.

Performance Characteristics and Benefits of Use

As a component from the Lambda Sensors and O2 Sensors category, this NOx sensor is designed to operate in the demanding thermal and chemical conditions of the exhaust system. The manufacturer's design ensures adequate resistance to temperature, vibrations, and contaminants present in diesel engine exhaust gases.

Using the correct NOx sensor offers a range of operational benefits:

• stable engine operation across the full load range,
• proper functioning of emission control and onboard diagnostic systems,
• reduced risk of exhaust system-related errors,
• maintenance of factory performance parameters and engine operating refinement.

A used element allows for economical repair of the emission system while maintaining the original technical specifications and proper fit for the vehicle's installation.

Professional Installation and Service Tips

Due to the nature of the NOx sensor's operation and its importance for engine control, installation by an experienced service center with access to appropriate diagnostics is recommended. During replacement, attention should be paid to:

• correct routing of the electrical harness,
• observing the correct tightening torque in the exhaust system socket,
• checking for any error codes in the control unit's memory after installation.

After installation, it is advisable to perform an adaptation or reset of parameters in the control unit, if the service procedure for the specific model provides for it. This allows the system to quickly adapt to the new sensor and reduces the risk of error messages reappearing.

More Components from This Group and Technical Knowledge

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

If you want to better understand how to safely choose used modules and sensors, how to verify compatibility by OEM numbers, and what to look for during installation, consult the guide: Used Automotive Electronics Onboard – Why Choose Used ECUs and Sensors?.