Mercedes W118 W177 W206 W247 Air Quality NOX Sensor A0009054807

Mercedes W118 W177 W206 W247 Air Quality NOX Sensor is a component from the Electronic control modules and controllers group, responsible for the precise measurement of exhaust gas parameters and air quality in the exhaust system. It enables the proper operation of emission control systems, stable fuel injection strategy, and the correct functioning of exhaust gas treatment systems in modern Mercedes models. This allows the engine control unit to operate within an optimized range, which promotes efficient vehicle operation.

Specifications and technical data

• SKU: A0009054807-1
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0009054807
• Substitutable numbers: A0009054807, A 000 905 48 07
• Category: ECUs & Computer Modules

Function and role of the NOX sensor in Mercedes

The Air Quality NOX Sensor in Mercedes W118, W177, and W247 series vehicles is responsible for monitoring nitrogen oxide content and mixture parameters in the exhaust stream. Based on the signal from this component, the engine control unit adjusts the fuel dose, exhaust gas recirculation operation, and the regeneration strategy for exhaust treatment components. A properly functioning sensor helps maintain stable performance, smooth engine operation, and compliance with emission standards.

In the event of sensor malfunction, errors may appear in the control unit memory, leading to power loss, increased fuel consumption, or problems passing emission tests. Replacing it with a functional component from the same group allows for restoring proper communication with the control module and ensuring predictable vehicle behavior under various load conditions.

Benefits of using an original electronic module

The Air Quality NOX Sensor from the Electronic control modules and controllers group is designed to work with the specific electrical architecture and control unit software of a given Mercedes model. Using an original solution ensures:

• proper communication with the vehicle bus and the engine control unit,
• stable measurement parameters across the full operating temperature range,
• consistency with factory emission control strategies,
• reduced risk of errors related to incompatible software.

As a result, the vehicle maintains predictable operating characteristics, and computer diagnostics remain clear and consistent with factory schematics.

Condition, selection, and installation of the sensor

The offered item is in used condition, which allows for an economical replacement while maintaining the manufacturer's original specifications. Before installation, it is recommended to verify compatibility with the specific engine version and model year of the vehicle, using the vehicle identification data and manufacturer markings. Proper selection reduces the risk of communication problems after installation.

During installation, it is important to ensure correct cable routing, proper tightening torque, and a tight seal at the mounting point in the exhaust system. After replacement, in many cases, it is necessary to perform an adaptation or clear errors in the control unit using an appropriate diagnostic tester so that the new sensor is correctly recognized by the system.

Technical support and additional information

If you want to better understand how to safely select and install used electronic modules and sensors in your car, check out our guide: Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?. You will find practical tips on selection based on manufacturer markings, hardware and software compatibility, and installation procedures.

If you are planning a comprehensive repair or upgrade of the engine control area in your Mercedes and need other components from the same group, such as controllers, auxiliary modules, or additional sensors, check out the available parts in the Mercedes electronic control modules and controllers category.