Audi Q5 FY Nox Exhaust Gas Sensor Lambda Probe Diesel 4-6 Cylinders 80A906261D

Audi Q5 FY NOx Sensor Exhaust Lambda Sensor Diesel 4-6 Cylinders is a specialized exhaust system component designed for diesel engines, responsible for precise measurement of nitrogen oxides in exhaust gases. Thanks to this sensor, the engine control unit can effectively manage the powertrain and exhaust gas purification system, supporting stable engine operation and proper emission system functionality. This solution is dedicated to users who expect proven, factory-original measuring electronics in their Audi.

Specifications and technical data

• SKU: 80A906261D
• Mark: Audi
• Condition: Used
• OEM Part Number: 80A906261D
• Substitutable numbers: 80A906261D, 80A 906 261 D
• Fuel type: Diesel
• Category: Oxygen Sensors

Purpose and Function in the Exhaust System

The presented NOx sensor plays a crucial role in monitoring exhaust gas composition in Diesel engines with four to six cylinders. This component works with the engine control system, providing accurate information about nitrogen oxide content, which enables:

• proper operation of the exhaust emission reduction system (e.g., systems with catalytic converters and particulate filters),
• maintenance of stable combustion parameters under various load conditions,
• reduction of the risk of the powertrain entering limp mode due to emission errors.

Thanks to this sensor, the exhaust system maintains proper operating parameters, and the vehicle meets the emission standards set for the specific model.

Technical Category: Lambda Sensors and O2 Sensors

The product belongs to the group of Lambda Sensors and O2 Sensors, which are components responsible for measuring exhaust gas composition and transmitting data to the engine control unit. In practice, this means that the NOx sensor:

• operates in direct contact with hot exhaust gases,
• must have appropriate thermal and chemical resistance,
• is an important diagnostic component – its improper functioning often results in warning lights appearing on the dashboard.

Replacing a worn or damaged sensor with a functional element from the same group allows for the restoration of correct system readings and reduces unnecessary service interventions on other components.

Product Characteristics and Application in Audi

The sensor is designed to work with the onboard electronics of the Audi brand, which translates to proper matching of electrical and communication parameters to the factory control unit. As a used component, it comes from the original vehicle installation, ensuring structural compatibility with the factory exhaust system and wiring harness.

The selection of this type of component should be based on vehicle identification data and manufacturer markings to ensure full compatibility with the specific engine version and control unit software. A properly selected NOx sensor helps reduce excessive fuel consumption, prevents emission-related errors, and stabilizes powertrain operation across the entire RPM range.

Benefits of Choosing a Used NOx Sensor

Using a tested, used NOx sensor in place of a damaged component can significantly reduce repair costs while maintaining the original system operating characteristics. The main advantages of this solution include:

• maintaining original electrical and communication specifications relative to the engine control unit,
• the ability to restore proper exhaust gas purification system operation without software intervention,
• reduction of incompatibility risks typical of aftermarket replacements of inconsistent quality.

This is a practical choice for users who want to restore full exhaust system functionality while controlling their repair budget.

Selection, Installation, and Technical Support

Before installing the NOx sensor, it is recommended to verify compatibility with the specific engine version and current control unit software. In practice, comparing markings and consulting with a diagnostician equipped with appropriate service software is helpful. Properly performed adaptation and error clearing after sensor replacement allow for the quick restoration of full system functionality.

If you want to deepen your knowledge on the selection and operation of used modules and sensors in cars, it is worth consulting a guide describing the principles of selection by VIN/OEM, hardware and software compatibility issues, and practical application examples – you will find it in the article Used Automotive Electronics Onboard – Why Choose Used ECU Modules and Sensors?.

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