Mercedes W205 W213 NOX Sensor Lambda Oxygen Probe A0009056204

Mercedes W205 W213 NOX Sensor Lambda Oxygen Probe is an original component from the Lambda probes and O2 sensors group, designed for precise monitoring of exhaust gas composition in modern Mercedes engines. This used OEM component ensures proper compatibility with the vehicle's factory electronics, which translates into stable engine and exhaust system operation. It is a solution for users looking for a technically matched sensor without the need to invest in a new part.

Specifications and technical data

• SKU: A0009056204
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0009056204
• Substitutable numbers: A0009056204, A 000 905 62 04
• Category: Oxygen Sensors

Function and role of the NOX sensor in a Mercedes

The NOX sensor in Mercedes W205 and W213 models is responsible for measuring nitrogen oxide content in exhaust gases and controlling the air-fuel mixture composition. A properly functioning sensor allows the engine control unit to dynamically adjust the fuel dose, which helps maintain compliance with emission standards and reduces the risk of warning lights appearing on the dashboard.

In practice, a functional element from the Lambda probes and O2 sensors category affects:

• stable engine operation across the full load range,
• proper operation of the exhaust gas treatment system,
• reduced risk of the unit entering limp mode,
• maintenance of optimal combustion parameters.

Why choose an original Mercedes sensor

The original NOX sensor designed for Mercedes is factory-matched to the engine control unit software and the electrical system architecture. Thanks to this:

• communication with the ECU occurs without interference,
• measurement parameters are consistent with the manufacturer's specifications,
• you minimize the risk of adaptation issues and diagnostic errors.

Compared to aftermarket replacements, a used OEM component often provides more predictable behavior in the long term, especially in vehicles equipped with extensive emission control systems.

Condition, verification, and practical application

The offered Mercedes W205 W213 NOX Sensor Lambda Oxygen Probe comes from disassembly and is classified as a used item. Such components are frequently chosen for repairs where maintaining compliance with factory specifications is key, while simultaneously optimizing service costs. A used NOX sensor is a reasonable solution, among others, for:

• clearing errors related to incorrect exhaust gas composition,
• restoring full exhaust system efficiency after a failure,
• comparative diagnostics (swapping the component to confirm a fault).

Selection and integration with vehicle electronics

When selecting a NOX sensor for a Mercedes, it is crucial to match it to the specific vehicle generation and exhaust system configuration. An original element from the appropriate model group facilitates mechanical and electrical installation, as well as subsequent computer diagnostics. The product has an assigned OEM part number and interchangeable numbers, which allows for unambiguous verification of compatibility with a given car based on manufacturer catalogs or service tools.

If you want to better understand when choosing a used sensor or other electronic component makes sense, it is worth reading the guide: The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?.

Expansion of the exhaust measurement system in a Mercedes

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

More on why choosing original, used components for this brand is cost-effective can be found in the article: Mercedes – comfort, prestige, and durability. Why is it worth choosing original used parts?.