Mercedes W118 W177 W206 W247 NOX Sensor A0009054807

Visual condition of the part 

The product shows signs of use visible in the photos. 

Mercedes W118 W177 W206 W247 NOX Sensor is a component from the Electronic control modules and controllers group, designed for precise monitoring of nitrogen oxide levels in the exhaust system of selected Mercedes models. Using an OEM component allows for a technically correct repair of the exhaust treatment system, maintaining the factory logic of the engine and emission system control. This is a solution for users who expect proven electronics while maintaining reasonable service costs.

Specifications and technical data

• SKU: A0009054807
• Mark: Mercedes (Genuine OE)
• Condition: Used
• OEM Part Number: A0009054807
• Substitutable numbers: A0009054807, A 000 905 48 07, KD
• Category: ECUs & Computer Modules

Function and application of the NOX sensor in Mercedes

The NOX sensor in Mercedes W118, W177, W206, and W247 series models is responsible for continuous measurement of nitrogen oxide concentration in the exhaust gases and transmitting this data to the engine control unit. Based on this information, the control system adjusts engine operation and the exhaust treatment system, which helps maintain compliance with emission standards and stable performance characteristics of the powertrain.

A functional NOX sensor is crucial for, among other things:

• proper operation of the emission reduction system (e.g., SCR, DPF),
• maintaining appropriate injection and boost maps,
• limiting emergency modes and error messages on the dashboard,
• stable engine operation across the full load range.

Benefits of using an original electronic module

As an element from the Electronic control modules and controllers group, the NOX sensor works directly with the factory engine control software. Using an original component allows for maintaining:

• compatibility of communication protocols with the vehicle bus,
• proper scaling of measurement signals,
• stability of the OBD diagnostic system,
• predictable system reactions to changes in load and exhaust temperature.

Thanks to this, installing a used, functional sensor is often a cost-effective alternative to purchasing a new part, while maintaining high-quality system performance.

Selection, installation, and diagnostics based on VIN/OEM

To correctly select a NOX sensor for a specific Mercedes vehicle, it is worth using OEM markings and vehicle data (VIN). This allows for verifying hardware and software compatibility with a given engine version and model year. In many cases, it is also important to match the hardware and software version of the module to avoid communication errors or incorrect signal interpretation.

During installation, pay attention to:

• proper seating of the probe in the exhaust system,
• condition of the electrical harness and connectors,
• potential need for adaptation or clearing errors in the controller after replacement.

Practical tips on selecting and installing used electronic modules can be found in the Global Parts guide: Used automotive electronics on board – why is it worth choosing second-hand ECU modules and sensors?

Condition, verification, and service application

The offered NOX sensor is a used item, which in practice means it comes from dismantling and has been verified for suitability for further use. This type of component is particularly useful in:

• exhaust emission system repairs after NOX errors appear,
• service centers specializing in Mercedes electronics,
• optimizing maintenance costs for fleet vehicles.

Choosing a verified, used sensor allows for reducing repair costs while maintaining proper cooperation with the factory engine controller, which is important both for the durability of the powertrain and for passing technical inspections later on.

Expansion of the control system in Mercedes – related components

If you are planning a comprehensive repair or upgrade of the engine area in your Mercedes and need other elements from the same group, such as controllers, auxiliary modules, or sensors, check the available parts in the Mercedes Electronic control modules and controllers category.