NOX Sensor Mercedes C118 W447 W177 W247 Lambda Oxygen Probe A0009056814

Mercedes C118 W447 W177 W247 Lambda Sensor NOx Sensor is an original part from the Lambda Sensors and O2 Sensors group, designed for precise control of exhaust gas composition and exhaust system operation in Mercedes vehicles. A used OEM component allows for a technically correct replacement of the factory sensor, maintaining operating parameters in line with the manufacturer's requirements.

Specifications and technical data

• SKU: A0009056814
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0009056814
• Substitutable numbers: A0009056814, A 000 905 68 14
• Category: Oxygen Sensors

Function and Application of the NOx Sensor / Lambda Sensor

The presented sensor is responsible for measuring the oxygen and nitrogen oxide content in exhaust gases, which enables the engine control unit to precisely adjust fuel injection and the exhaust gas purification system. A properly functioning NOx sensor supports:

• stable engine operation under various load conditions,
• compliance with emission standards,
• reduced fuel consumption through proper mixture correction,
• protection of exhaust system components, including the catalytic converter and particulate filter.

For modern Mercedes models with advanced emission control, a functional NOx sensor is a key element for the correct operation of the entire powertrain.

Compatibility and Selection by OEM Number

The offered part belongs to the group of original Mercedes components and is assigned to specific versions of the C118, W447, W177, and W247 models. Selection is based on the OEM number and interchangeable numbers, which allows verification of compatibility with a given engine and vehicle year. This ensures that the sensor's geometry, connector type, and measurement characteristics match the factory requirements.

When planning a replacement, it is advisable to compare the markings of the removed part with the data in the specification and, if necessary, verify the fitment by VIN number in the manufacturer's catalog or with a specialist in Mercedes electronics.

Condition, Verification, and Preparation for Installation

The product is used, which in practice means it comes from disassembly and has been verified for its suitability for further operation. Such components are often chosen as an economical alternative to new parts, especially for advanced emission sensors where the cost of a brand-new component is high.

Before installation, it is recommended to:

• check the wiring harness and connector for mechanical damage in the vehicle,
• perform computer diagnostics after installation to confirm correct system operation,
• clear saved error codes and perform adaptation if required by the service procedure for the specific model.

Benefits of Choosing an Original Used Sensor

By choosing an original Mercedes NOx sensor / lambda sensor from the aftermarket, the user gains a combination of correct compatibility and real cost savings. An original component retains its factory measurement characteristics, which is particularly important in vehicles with complex emission control systems, where aftermarket alternatives with uncertain parameters can cause errors and unstable engine operation.

Additionally, using an OEM part facilitates future diagnostics – the engine control unit "sees" the sensor according to factory specifications, and the data from readings are consistent with service documentation.

More About Used Electronics and Sensors

If you want to approach the purchase of a used NOx sensor consciously and better understand issues related to selection by OEM number, hardware and software compatibility, and installation principles, read the guide: Used Automotive Electronics – ECU Modules and Second-Hand Sensors. This is a practical source of knowledge that helps reduce the risk of a wrong purchase and facilitates communication with a diagnostician or car electrician.

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