Audi Q3 Exhaust Lambda NOx Oxygen Sensor 2.0 TFSI CULB Petrol 06K906262

Audi Q3 Exhaust Lambda NOx Oxygen Sensor 2.0 TFSI CULB is an original exhaust system component from the Lambda sensors and O2 sensors group, designed for Audi petrol engines. It enables precise measurement of exhaust gas composition, supporting the proper operation of the 2.0 TFSI engine and maintaining stable emission parameters.

Specifications and technical data

• SKU: 06K906262
• Mark: Audi
• Condition: Used
• OEM Part Number: 06K906262
• Substitutable numbers: 06K906262, 06K 906 262
• Fuel type: Petrol
• Category: Oxygen Sensors

Purpose and function in the exhaust system

The presented Lambda NOx sensor is designed to work with the 2.0 TFSI petrol engine with the CULB designation in the Audi Q3. It is responsible for monitoring the air-fuel mixture composition and the nitrogen oxide content in the exhaust gases, which allows the engine control unit to continuously adjust the fuel dose and ignition timing. As a result, the power unit maintains stable operating culture, and the three-way catalytic converter can effectively reduce the emission of harmful compounds.

A properly functioning oxygen sensor in a petrol engine is crucial for:

• maintaining the optimal mixture composition across the full load range,
• reducing fuel consumption while maintaining appropriate dynamics,
• meeting the exhaust emission standards provided for a given model,
• protecting exhaust system components from overheating and excessive load.

Benefits of using an original Audi lambda sensor

Using an original sensor from the Lambda sensors and O2 sensors group in an Audi Q3 with a petrol engine ensures full compatibility with the factory engine control unit characteristics. The component has been designed for specific injection and ignition maps, ensuring that the response to changes in exhaust gas composition is fast and repeatable. In practice, this translates into:

• stable idle speed without unwanted fluctuations,
• smooth acceleration without jerking resulting from incorrect mixture correction,
• reduced risk of diagnostic errors related to the combustion system,
• better cooperation with the exhaust gas treatment system, including the catalytic converter.

Choosing an original component is particularly important in modern direct-injection petrol engines, where the tolerance margin for deviations in exhaust gas composition measurement is small. Precise reading of lambda and NOx values helps keep the engine within the parameters specified by the manufacturer.

Characteristics of the used component

The offered oxygen sensor is a used part, sourced from dismantling. This type of part, provided the donor vehicle was operated correctly, retains its measurement properties and can be successfully used as a replacement for a damaged sensor in another Audi Q3 with a petrol engine. For many users, this is a reasonable compromise between cost and functionality, especially in the case of advanced exhaust gas sensors.

When choosing a used Lambda NOx sensor, it is worth paying attention to:

• fuel type compatibility – in this case, it is dedicated to petrol units,
• intended use for a specific engine family,
• lack of mechanical damage to the housing and connectors.

Selection by numbers and compatibility

Due to the specificity of control systems in modern petrol engines, the selection of a Lambda NOx sensor should be based on catalog data, the OEM part number, or identification via the vehicle's VIN. This avoids electrical and software compatibility issues and ensures proper cooperation with the wiring harness and the engine control unit.

To better understand how to safely choose used sensors and electronic modules, it is worth reading the guide describing selection by VIN/OEM, compatibility issues, and practical installation examples: Used automotive electronics – a guide to selecting ECU modules and sensors.

Expanding the exhaust measurement system in Audi

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

Selecting components from a single product group allows for maintaining consistency of measurement parameters throughout the system, which facilitates diagnostics, calibration, and subsequent vehicle operation. In the case of the Audi Q3 with a petrol engine, this is of particular importance due to advanced mixture and emission control strategies.