Mercedes C204 C207 S212 NOX Sensor Lambda Probe Oxygen Sensor A0009050119

Mercedes C204 C207 S212 NOX Sensor Lambda Probe Oxygen Sensor is a component from the Lambda probes and O2 sensors group, designed for precise monitoring of exhaust gas composition in Mercedes vehicles. It enables the proper operation of the exhaust gas treatment system, supporting stable engine characteristics and compliance with emission standards.

Specifications and technical data

• SKU: A0009050119
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0009050119
• Substitutable numbers: A0009050119, A 000 905 01 19, A 007 542 00 18, A0075420018, A 000 905 51 00, A0009055100
• Category: Oxygen Sensors

Purpose and function in the exhaust system

The NOX sensor / lambda probe in Mercedes C-Class and E-Class models is responsible for the continuous measurement of nitrogen oxides and oxygen content in the exhaust gases. Based on this data, the engine control unit adjusts the fuel dosage, the operation of the injection system, and the regeneration strategy for exhaust treatment components. A properly functioning sensor translates into stable engine operation, reduced smoke, and the maintenance of correct emission parameters.

In practice, this means more efficient operation of emission reduction systems, better engine performance, and a reduced risk of the unit entering emergency mode. A functional NOX sensor / lambda probe is crucial for diagnosing faults related to the exhaust and injection systems.

Benefits of using an original Mercedes component

The offered sensor comes from a line of parts intended for the Mercedes brand, which ensures proper fitment with the electrical installation and exhaust system in C204, C207, and S212 bodies. Using an original solution reduces the risk of compatibility issues, bus communication errors, and incorrect exhaust parameter readings.

The main advantages of using this component include:

• Factory fitment to the electrical harness and engine control unit in Mercedes vehicles.
• Stable, repeatable exhaust parameter readings, facilitating diagnostics and adaptation.
• Reduction of the risk of errors related to the NOX system and lambda probes.
• Possibility of utilizing the manufacturer's existing service and diagnostic procedures.

Operational and installation characteristics

The component belongs to the Lambda probes and O2 sensors group, which means it operates in a demanding environment of high temperatures and variable chemical conditions of exhaust gases. When replacing, it is recommended to follow the manufacturer's procedures, including proper cable routing, correct thread tightening, and – if necessary – performing an adaptation or resetting values in the engine control unit.

Due to the used nature of the product, it is a particularly cost-effective solution for repairs where maintaining the original vehicle specification while limiting expenses is important. This type of component is often chosen when clearing errors related to incorrect exhaust composition, power loss, or the unit entering emergency mode.

Practical application of used electronics and sensors

When choosing a used NOX sensor / lambda probe, it is worth paying attention to compatibility with the specific engine version and control unit software. In many cases, a used component allows for effectively restoring correct engine operating parameters, provided that proper diagnostics and installation are performed. If you want to better understand when choosing used modules and sensors makes sense, check out the article Second life of electronics – when is it worth choosing used engine control units, comfort modules, and parking sensors?, where you will find practical tips on selecting and testing automotive electronics.

Expansion of the exhaust measurement system in a Mercedes

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