Volkswagen Tiguan Mk2 Exhaust Oxygen Lambda NOx Sensor 2.0 Diesel 04L907805AH

Volkswagen Tiguan Mk2 Exhaust Oxygen Lambda NOx Sensor is a specialized exhaust system component designed for diesel engines, responsible for precise measurement of exhaust gas composition and nitrogen oxide content. Thanks to its factory-engineered design for the Volkswagen brand, it ensures proper integration with the engine control electronics and the exhaust gas treatment system. This used component allows for an economical yet technically sound repair of the emission system in your second-generation Tiguan.

Specifications and technical data

• SKU: 04L907805AH
• Mark: Volkswagen
• Condition: Used
• OEM Part Number: 04L907805AH
• Substitutable numbers: 04L907805AH, 04L 907 805 AH
• Fuel type: Diesel
• Category: Oxygen Sensors

Function of the lambda probe and NOx sensor in a 2.0 Diesel engine

The described sensor combines the function of a lambda probe and nitrogen oxide measurement in the exhaust, which is crucial for the operation of a modern 2.0 Diesel engine. Based on signals from this component, the engine control unit (ECU) adjusts the fuel dosage, injection system operation, and exhaust treatment strategy to maintain stable engine performance and meet emission standards.

In practice, a properly functioning NOx sensor helps reduce fuel consumption, minimize smoke, and maintain the efficiency of components such as the catalytic converter or diesel particulate filter (DPF). For the user, this means smoother engine operation, better throttle response, and a lower risk of emission-related error codes.

Benefits of using an original Volkswagen component

Choosing an original solution designed for the Volkswagen Tiguan Mk2 ensures perfect compatibility with the vehicle's electrical installation and exhaust system. The sensor has been engineered to work with the engine management software used in this model generation, minimizing the risk of compatibility issues and the need for additional modifications.

The most important advantages of this solution include:

• a stable measurement signal adapted to the characteristics of the diesel engine,
• proper integration with the exhaust emission control system,
• preservation of the engine's factory operating parameters,
• reduction of the risk of error codes appearing in the ECU memory.

As a result, a used, original sensor can be an effective alternative to new aftermarket replacements, especially for repairs focused on cost-efficiency while maintaining correct operating parameters.

Professional selection and installation in the exhaust system

To fully utilize the potential of this component, proper selection based on the engine version and exhaust system configuration is essential. In practice, this means ensuring compatibility with the 2.0 Diesel unit and following correct installation procedures, including proper cable routing, connector protection, and maintaining the correct tightening torque.

After installation, it is recommended to perform computer diagnostics, clear stored error codes, and verify the real-time operating parameters of the lambda probe and NOx sensor. This approach allows for quick confirmation that the emission system is functioning within the expected range and that the ECU is correctly interpreting signals from the newly installed component.

Why consider used electronics and sensors?

For advanced components such as NOx sensors, used parts sourced from vehicle dismantling can offer a reasonable compromise between cost and functionality. Provided they are correctly verified and sourced from a reliable provider, they allow for a significant reduction in repair costs without sacrificing original technical specifications. If you want to better understand how to safely select such components, when it is worth choosing a used module, and how to check compatibility, check out our guide Used automotive electronics – ECU modules and second-hand sensors.

Related Volkswagen exhaust emission components

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