Audi A4 B9 2.0 TFSI DEMA Petrol NOX Lambda Sensor is a component from the Lambda Sensors and O2 Sensors category, designed for the exhaust system in petrol engines. It is responsible for precise measurement of oxygen content in exhaust gases, allowing the engine control unit to maintain stable operation, proper fuel dosing, and compliance with emission standards. This is a solution for users who want to restore the correct operation of the powertrain without unnecessary compromises.
Specifications and technical data
- SKU: 8R0906262E
- Mark: Audi
- Condition: Used
- OEM Part Number: 8R0906262E
- Substitutable numbers: 8R0906262E, 8R0 906 262 E
- Fuel type: Petrol
- Category: Oxygen Sensors
Purpose and Role in Engine Control System
The NOX / Lambda sensor in the Audi A4 B9 2.0 TFSI DEMA petrol engine works with the fuel-air mixture control system. Based on the signal from the sensor, the control unit adjusts the fuel dose, which translates to:
- stable engine operation across the full load range,
- more predictable throttle response,
- maintaining the efficiency of the catalytic converter and exhaust gas purification components,
- limiting excessive fuel consumption while preserving adequate dynamics.
For petrol engines, the repeatability of the sensor signal is particularly important, as even small deviations can result in uneven running, control unit errors, and a decrease in driving comfort.
Technical Characteristics and Compatibility
The presented component belongs to the group of Lambda Sensors and O2 Sensors dedicated to petrol engines. The sensor's construction is adapted to the working conditions in the exhaust system – high temperatures, variable loads, and contact with exhaust gases. Thanks to this, it can transmit a stable signal to the ECU over a long period of operation.
The product comes from the Audi brand offering, which means maintaining factory operating characteristics and proper cooperation with the control unit software. For the user, this means:
- no need to adapt operating parameters in the control unit,
- preservation of original fuel maps,
- lower risk of errors related to incorrect sensor signals.
Condition, Origin, and Practical Application
The offered Audi Lambda / NOX Sensor is a used component, which in practice allows for an economical repair of the exhaust system while maintaining the original manufacturer's specifications. This is a particularly beneficial solution for modern petrol engines, where new components can be expensive, and a well-chosen used part still ensures an adequate level of functionality.
Replacing the sensor is recommended in situations where there are mixture-related errors, increased fuel consumption, power loss, or problems passing emission tests. Using the correct sensor helps restore:
- correct long-term and short-term fuel trims in the control unit,
- stable idle speed,
- efficient operation of the catalytic converter and exhaust gas purification system.
Why Choose a Used Audi Lambda Sensor
When it comes to engine electronics and sensors, choosing a used component makes sense if it comes from a reliable source and matches the manufacturer's markings. Such a component allows for reduced service costs while maintaining factory operating characteristics. More practical tips on selection and installation can be found in the Global Parts guide: used automotive electronics – second-hand ECU modules and sensors.
If you are looking for other Audi Lambda Sensors and O2 Sensors compatible with different models and engine versions, check out our dedicated offer: Audi Lambda Sensors and O2 Sensors. This will make it easier to select a component compatible with your car's specific configuration.
Summary
Audi A4 B9 2.0 TFSI DEMA Petrol NOX Lambda Sensor is a solution for drivers who want to restore the correct operation of the fuel-exhaust system in their petrol engine, maintaining parameters close to factory settings. A used component from the Audi offering allows for a technically correct repair, cost reduction, and sustained stable engine operation without interfering with the control unit software.
