VW Volkswagen Passat B8 Lambda Probe NOX Oxygen Sensor 2.0 TDI DFGA 04L907805DC

VW Volkswagen Passat B8 Lambda Probe NOX Oxygen Sensor 2.0 TDI DFGA is a component from the Lambda probes and O2 sensors group, responsible for the precise measurement of exhaust gas composition and nitrogen oxide content in the exhaust system. A properly functioning NOX sensor supports stable diesel engine operation, reduces exhaust emissions, and helps maintain compliance with onboard diagnostic system requirements.

Specifications and technical data

• SKU: 04L907805DC
• Mark: Volkswagen
• Condition: Used
• OEM Part Number: 04L907805DC
• Substitutable numbers: 04L907805DC, 04L 907 805 DC
• Category: Oxygen Sensors

Function and role of the NOX sensor in the Passat B8 2.0 TDI DFGA

The presented NOX sensor works with the engine control system in the Volkswagen Passat B8 with the 2.0 TDI DFGA unit, monitoring the exhaust gas composition in the stream of the advanced exhaust system. Based on the signal from the sensor, the engine controller adjusts the fuel dose, exhaust gas recirculation operation, and emission control strategy, which translates into stable engine performance and reduced fuel consumption.

Thanks to the precise measurement of nitrogen oxide content, the sensor supports the proper operation of emission reduction systems and minimizes the risk of error codes appearing in the controller memory or the engine entering limp mode. This is particularly important in modern diesels, where the correct cooperation of all exhaust system components has a direct impact on performance and driving comfort.

Construction and integration with the control system

The offered element combines the function of a measuring probe and the electronics responsible for signal processing in one housing, which enables direct communication with the engine control unit. The applied design is adapted to the conditions prevailing in the exhaust system – high temperature, variable loads, and the presence of aggressive exhaust components.

As a part from the Lambda probes and O2 sensors group, the NOX sensor is a key element of the feedback loop in the engine control system. A properly selected and efficient component allows for maintaining the factory operating parameters of the engine, reducing smoke, and ensuring stable emission values across the entire load range.

Benefits of using an original Volkswagen component

Choosing an original Volkswagen solution means maintaining compliance with the vehicle's factory specifications and proper electrical and mechanical fitment. As a result, installation is predictable, and the risk of communication problems with the engine controller is minimized.

• maintaining engine operating parameters in accordance with the manufacturer's specifications,
• stable cooperation with the OBD diagnostic system,
• appropriate signal characteristics across the full operating temperature range,
• reduced risk of recurring errors related to exhaust gas measurement.

The item in used condition represents a reasonable compromise between repair costs and maintaining original build quality, which is particularly important for advanced electronic exhaust system components.

Condition, application, and selection of parts

The offered NOX sensor is a used component intended for installation in Volkswagen Passat B8 vehicles with the 2.0 TDI DFGA engine, where it is necessary to restore correct exhaust gas composition measurement. Before purchasing, it is worth verifying compatibility with your specific vehicle based on technical data and exhaust system configuration.

To better understand when choosing a used electronic component is justified and how to approach its selection, it is worth reading the guide: The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?. The article discusses practical aspects of purchasing used automotive electronics, which can help in making an informed service decision.

Expansion of the exhaust measurement system in a Volkswagen

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