VW Golf Mk6 Audi A3 8P 1.4 TSI NOx Sensor Lambda Oxygen Probe 03C906262AK

VW Golf Mk6 Audi A3 8P 1.4 TSI NOx Sensor Lambda Oxygen Probe is a component from the Lambda sensors and O2 sensors group, responsible for precise exhaust gas composition measurement and nitrogen oxide emission control in TSI petrol engines. The offered sensor comes from the Volkswagen line and is intended for service applications in the group's vehicles, ensuring stable engine control system operation and proper functioning of exhaust gas purification systems.

Specifications and technical data

• SKU: 03C906262AK
• Mark: Volkswagen
• Condition: Used
• OEM Part Number: 03C906262AK
• Substitutable numbers: 03C906262AK, 03C 906 262 AK, 0 258 010 104, 0258010104
• Category: Oxygen Sensors

Purpose and function in the exhaust system

The NOx sensor in the 1.4 TSI engine operates in the exhaust stream, where it continuously monitors nitrogen oxide content and signals their levels to the engine control unit. This enables:

• real-time fuel-air mixture correction,
• maintaining the efficiency of the catalytic converter and exhaust purification components,
• emission reduction in urban and highway driving conditions,
• stabilization of the power unit's operation across a wide range of loads.

In vehicles such as the VW Golf Mk6 or Audi A3 8P with a 1.4 TSI engine, a properly functioning NOx sensor is crucial for maintaining compliance with emission standards and for the correct operation of injection and ignition maps.

Benefits of using an original NOx sensor

Using a component from the Volkswagen group ensures compatibility with the factory controller and reliable exhaust parameter readings. In practice, this translates into:

• more predictable engine responses to load and gear changes,
• reduced risk of errors related to the mixture and emissions,
• proper cooperation with the existing electrical harness and ECU software,
• maintenance of factory exhaust system operating strategies.

For the user, this means more peaceful operation, no random limp modes, and more predictable fuel consumption in daily driving.

Characteristics of the used component

The offered sensor belongs to the group of used parts, which allows for an economical repair of the exhaust system while retaining a component from the original production line. This type of solution is particularly attractive when servicing older VW Golf Mk6 and Audi A3 8P models, where a reasonable balance between cost and functionality is important.

Before installation, a standard service procedure is recommended: checking the electrical installation, verifying the condition of connectors, and checking for any errors stored in the engine controller. A properly selected and installed NOx sensor allows for restoring the correct operation of the emission control system without the need for software interference.

Selection by part numbers and technical support

The component has a dedicated OEM part number and associated interchangeable numbers, which facilitates precise identification and selection for a specific engine version. When matching, it is worth using the manufacturer's markings, catalog data, and information from the vehicle's identification plate to avoid compatibility issues.

If you want to better understand how to safely choose used sensors and electronic modules, how to interpret OEM markings, and what to pay attention to during installation, check out our guide: Used automotive electronics – ECU modules and second-hand sensors.

Expanding service within the exhaust emission system

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