NOX Sensor Mercedes W164 W218 OM642 Lambda Oxygen Probe A0009053706

Mercedes W164 W218 OM642 Lambda Sensor NOX Sensor is a specialized exhaust system component designed for precise exhaust gas composition monitoring in Mercedes vehicles with the OM642 engine. A used NOX sensor from this OEM series ensures stable engine control unit operating parameters, supporting the correct functioning of the exhaust gas purification system and maintaining compliance with emission standards. This is a solution for users who expect a proven part with factory operating characteristics.

Specifications and technical data

• SKU: A0009053706
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0009053706
• Substitutable numbers: A0009053706, A 000 905 37 06
• Category: Oxygen Sensors

Purpose and Role in the Exhaust System

The lambda sensor and NOX sensor in the OM642 engine are responsible for real-time measurement of oxygen and nitrogen oxide content in the exhaust gases, allowing the engine control unit to adjust fuel injection and effectively manage the exhaust gas purification system. In Mercedes W164 and W218 models, a properly functioning NOX sensor is crucial for:

• maintaining stable engine operation across the full load range,
• reducing harmful compound emissions,
• preventing the powertrain from entering limp mode,
• ensuring correct operation of OBD diagnostic systems.

Benefits of Using an Original Mercedes Sensor

An original Mercedes part from the Lambda Sensors and O2 Sensors category ensures that the measurement characteristics comply with the requirements of the factory engine control unit software. This results in:

• maintained proper dynamic response to changes in exhaust gas composition,
• no need for ECU adaptation for a replacement part with different parameters,
• reduced risk of NOX system errors appearing in the fault memory.

A used OEM sensor also offers a reasonable compromise between repair cost and maintaining factory settings and control logic.

Selection by Numbers and Compatibility

The selection of a lambda sensor and NOX sensor for a Mercedes should be based on the OEM part number and interchangeable numbers, taking into account the specific OM642 engine version and vehicle generation (W164, W218). In practice, this means verifying compatibility:

• with the engine unit designation,
• with the engine control unit software version,
• with the exhaust system configuration (sensor position in the exhaust line).

To better understand the principles of selecting used modules and sensors, it is worth consulting the guide: Used Automotive Electronics Onboard – Why Choose Second-Hand ECUs and Sensors?, which discusses VIN/OEM selection, compatibility issues, and practical installation examples.

Condition, Verification, and Installation

The presented part is in Used condition, meaning it comes from an operated vehicle and has been selected for further use. Before installation, it is recommended to:

• inspect the wiring harness and connectors for mechanical damage,
• verify the absence of corrosion on the contacts,
• perform computer diagnostics after installation to confirm correct NOX and lambda sensor parameter readings.

A correctly installed NOX sensor in the OM642 exhaust system allows for the restoration of proper mixture correction values and minimizes the risk of recurring exhaust emission-related errors.

System Expansion – Other Mercedes Lambda Sensors and O2 Sensors

If you are planning a comprehensive service of your Mercedes' exhaust system and wish to simultaneously replace other measurement components, such as additional upstream and downstream oxygen sensors, to maintain consistent parameters for the entire system, check the available parts in the Mercedes Lambda Sensors and O2 Sensors category.