Mercedes C207 Exhaust Lambda Nox Oxygen Sensor A0009055106

Mercedes C207 Exhaust Lambda Nox Oxygen Sensor is a specialized exhaust system component designed for precise monitoring of exhaust gas composition and nitrogen oxide levels in Mercedes vehicles. Thanks to its factory design and fitment for the specific C-Class platform, it ensures stable engine operation, proper functioning of exhaust emission control systems, and compliance with emission standards. This is the solution for users seeking a proven, original lambda/NOx sensor instead of random aftermarket replacements.

Specifications and technical data

• SKU: A0009055106
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0009055106
• Substitutable numbers: A0009055106, A 000 905 51 06
• Category: Oxygen Sensors

Function and application of the lambda NOx sensor in Mercedes C207

The sensor from the Lambda sensors and O2 sensors category is responsible for measuring oxygen content in exhaust gases and – depending on the system configuration – also nitrogen oxides. Based on this data, the engine control unit adjusts the fuel dosage, fuel injection operation, and regeneration strategy for exhaust emission control components. A properly functioning sensor translates into:

• stable engine operation across the full load range,
• maintenance of the optimal air-fuel mixture,
• efficient operation of the catalytic converter and/or NOx reduction system,
• reduced fuel consumption and emissions of harmful compounds.

In the case of Mercedes vehicles, incorrect readings from the NOx lambda sensor often result in the check engine light turning on, the vehicle entering limp mode, and the logging of exhaust-related errors. Replacing it with a properly selected component allows for the restoration of full system functionality.

Benefits of choosing an original Mercedes sensor

The original lambda NOx sensor dedicated to the C207 platform ensures full electrical and communication compatibility with the factory engine control unit. This means correct signal interpretation, no diagnostic issues, and stable operating parameters over a long period of use. Compared to random replacements, you gain:

• certainty of fitment with the electrical harness and connectors in your Mercedes,
• compliance of measurement characteristics with the maps in the control unit,
• lower risk of needing further intervention in the exhaust system in the near future.

A component from this group is particularly important in modern engines, where the emission control system is closely linked to engine operation, and incorrect sensor readings can affect performance and engine refinement.

Characteristics and condition of the offered component

The presented sensor belongs to the Lambda sensors and O2 sensors Mercedes category and comes from a vehicle dismantling process, which allows for combining an attractive price with the preservation of the manufacturer's original specifications. Such used electronics and exhaust system components are frequently chosen by conscious users who expect factory-grade quality at reasonable service costs.

Before installation, a standard workshop procedure is recommended: verification of the electrical installation, inspection of the wiring harness for mechanical damage, and computer diagnostics after replacement. This ensures that the newly installed sensor can work under optimal conditions immediately, and the engine control system will quickly adjust its corrections.

Selection by OEM number and technical support

This model of lambda NOx sensor was designed specifically for Mercedes vehicles, which is why using the OEM number and vehicle data is crucial during selection. In practice, this means the ability to precisely match the part to a specific engine version and model year, which minimizes the risk of incompatibility. In case of doubt, it is worth using diagnostics or consulting a mechanic who will confirm the correctness of the selection based on service documentation.

If you want to better understand when choosing a used sensor makes sense, how to check compatibility, and what to pay attention to during installation, check out the Global Parts guide: Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?

Expanding Mercedes exhaust system service

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

For drivers who are planning broader vehicle service and want to take a conscious approach to replacing consumable components, a practical overview of the most frequently serviced car parts may also be helpful: TOP 10 most frequently replaced parts in your car.