Exhaust Lambda Audi A4 B6 B7 A8 D3 Diesel Engine Oxygen Sensor 070906252B

Exhaust Lambda Audi A4 B6 B7 A8 D3 Diesel Engine Oxygen Sensor is an exhaust system component responsible for precise measurement of oxygen content in exhaust gases, which is crucial for the proper operation of the engine control unit. This oxygen sensor, designed for selected Audi models with diesel engines, helps maintain stable combustion parameters, reduce fuel consumption, and supports the proper functioning of emission control systems. By using an original Audi solution, you gain consistency with factory ECU calibration and predictable engine performance.

Specifications and technical data

• SKU: 070906252B
• Mark: Audi
• Condition: Used
• OEM Part Number: 070906252B
• Substitutable numbers: 070906252B, 070 906 252 B, 928404689, 928 404 689, 070906262, 070 906 262
• Fuel type: Diesel
• Category: Oxygen Sensors

Purpose and function in the exhaust system

The offered lambda sensor belongs to the Lambda sensors and O2 sensors group and works with a diesel engine, monitoring exhaust gas composition in real time. Based on the signal from the sensor, the engine controller adjusts the fuel dose, which affects:

• stable engine operation across the full load range,
• maintaining the correct air-fuel ratio,
• efficient operation of the exhaust gas treatment system,
• reduction of smoke and improvement of diesel engine refinement.

A properly functioning lambda sensor also helps reduce the risk of premature wear of exhaust system components, such as the diesel particulate filter or catalytic converter, as the controller receives reliable data on the actual exhaust gas composition.

Compatibility and OEM identification

The presented oxygen sensor is an original Audi component, which facilitates matching to a specific engine configuration and controller software. This allows for maintaining factory operating characteristics of the diesel engine without the need for modifications to the electrical installation or software. Selection by OEM number and interchangeable numbers allows for verifying compatibility with a specific Audi A4 B6, A4 B7, or A8 D3 vehicle, minimizing the risk of purchasing an unsuitable part.

In case of doubts regarding matching to a specific diesel engine, it is worth using the VIN number and service documentation to confirm full compatibility with the existing exhaust system and engine controller.

Operating characteristics in a diesel engine

The lambda sensor designed for diesel engines operates under specific conditions – at higher pressures and different exhaust temperatures than in gasoline engines. The sensor design is adapted to:

• continuous operation in an environment with increased soot content,
• stable signal generation over a wide load range,
• cooperation with injection maps typical for Audi diesel engines.

Thanks to this, the controller can precisely control the combustion process, which translates into more predictable throttle response, better performance repeatability, and maintaining emission parameters within the limits specified by the manufacturer.

Condition, origin, and advantages of using a used part

The offered lambda sensor is a used component, sourced from dismantling, which represents a reasonable compromise between cost and functionality. Choosing an original Audi sensor from the secondary market allows you to:

• maintain compatibility with the factory installation and electrical harness,
• avoid signal quality issues typical of cheap replacements,
• reduce repair costs compared to a new part from an authorized service center.

Before installation, standard exhaust system diagnostics and inspection of the electrical installation are recommended to rule out other causes of errors related to the mixture or exhaust emissions.

Technical support and additional materials

If you want to better understand how to safely and consciously use used sensors and other engine electronics components, check out the Global Parts guide: Used automotive electronics – ECU modules and second-hand sensors, where you will find practical tips on selection by OEM numbers, hardware and software compatibility, and installation.

If you are planning a comprehensive repair or upgrade of the engine area in your Audi and need other components from the same group, such as additional oxygen sensors, pre-catalyst sensors, or post-catalyst sensors, check the available parts in the Audi Lambda sensors and O2 sensors category.