Mercedes C205 W205 Exhaust NOX Lambda Oxygen Sensor Probe Front A0009058511

Mercedes C205 W205 Exhaust NOX Lambda Oxygen Sensor Probe Front is a precision exhaust system component responsible for accurate measurement of exhaust gas composition upstream of the catalytic converter. Thanks to the factory Mercedes design and the preservation of original measurement characteristics, this sensor ensures stable engine operation and proper emission control. This is a solution for users who expect consistency with the factory engine control unit software and predictable powertrain behavior.

Specifications and technical data

• SKU: RHD-A0009058511
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0009058511
• Substitutable numbers: A0009058511, A 000 905 85 11, A 000 905 85 11 64, A000905851164
• Location on the vehicle: Front
• Category: Oxygen Sensors

Purpose and function in the exhaust system

The front NOX / lambda sensor in the Mercedes C-Class C205 / W205 generation operates at a critical point in the exhaust system – before the exhaust gas purification elements. It is responsible for:

• continuous measurement of oxygen and nitrogen oxide content in exhaust gases,
• transmitting data to the engine control unit in real time,
• correcting fuel dosage and mixture composition,
• maintaining engine operation compliance with emission standards.

As a result, the control unit can precisely manage the combustion process, which translates into stable engine performance, reduced smoke, and protection of exhaust system components, such as the catalytic converter or particulate filter.

Vehicle placement and diagnostic significance

The component is designed for installation in the front section of the exhaust system, where operating conditions are particularly demanding (high temperature, variable loads). Proper placement on the vehicle allows the sensor to:

• react quickly to changes in mixture composition,
• provide reliable data for control unit adaptation,
• facilitate the diagnosis of faults related to exhaust emissions and engine operation.

A properly functioning NOX / lambda sensor at the front of the exhaust system is crucial when clearing OBD errors, performing adaptations after repairs, and during emission inspections.

Benefits of using an original Mercedes sensor

Choosing an original sensor from the Lambda sensors and O2 sensors category dedicated to the Mercedes C205 / W205 allows for maintaining the operating parameters specified by the vehicle manufacturer. In practice, this means:

• preserving factory fuel maps and engine control strategies,
• lower risk of errors related to incorrect exhaust gas composition readings,
• better cooperation with the exhaust gas purification system over the long term.

This solution is particularly beneficial for users who want to keep their car in a configuration close to factory specifications, without experimenting with aftermarket replacements of uncertain parameters.

Product characteristics and practical application

The offered NOX / lambda sensor is a component originating from a Mercedes vehicle, which ensures full structural compatibility with the exhaust system of C205 / W205 models. The product is intended for service applications, such as:

• replacing a damaged sensor causing emission errors,
• restoring proper engine operation after exhaust system modifications,
• comparative diagnostics in the case of hard-to-locate faults.

For workshops and individual users, this means the possibility of using a proven component with factory characteristics, without the need for adjusting the installation or software.

Why consider used electronics and sensors?

For components such as the NOX / lambda sensor, matching by OEM number and hardware-software compatibility with the specific engine control unit is key. This is why many users opt for used OEM components instead of new aftermarket replacements. If you want to better understand how to safely select modules and sensors, how to verify compatibility, and what to pay attention to during installation, check the Global Parts guide: used automotive electronics and second-hand sensors.

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 NOX sensors, check the available parts in the Mercedes Lambda sensors and O2 sensors category.