Audi A3 8V Volkswagen Golf 5G Oxygen Lambda Sensor Unit 1.2 Petrol 04E906262BF

Audi A3 8V Volkswagen Golf 5G Oxygen Lambda Sensor Unit 1.2 Petrol is a component from the Oxygen sensors and O2 sensors category, designed for petrol engine fuel systems. It enables precise measurement of exhaust gas composition, which supports stable engine operation, correct fuel mixture adjustment, and compliance with emission standards. This is a practical solution for users looking for a proven, used component for Volkswagen and Audi vehicles.

Specifications and technical data

• SKU: 04E906262BF
• Mark: Volkswagen
• Condition: Used
• OEM Part Number: 04E906262BF
• Substitutable numbers: 04E906262BF, 04E 906 262 BF
• Fuel type: Petrol
• Category: Oxygen Sensors

Function of the oxygen sensor in a petrol engine

The oxygen sensor in a petrol engine is responsible for monitoring the oxygen content in the exhaust gases and sending a signal to the engine control unit. This makes it possible to maintain the air-fuel mixture within the optimal range, which translates into:

• stable operation at idle and during acceleration,
• efficient operation of the catalytic converter,
• reduced fuel consumption,
• lower emissions of harmful exhaust components. In vehicles such as the Volkswagen Golf 5G and Audi A3 8V, a properly functioning oxygen sensor is crucial for the correct operation of the engine management system and maintaining full functionality of the OBD diagnostic system.

Purpose and compatibility

The presented component has been designed to work with 1.2-litre petrol engines used in popular compact segment models. Its application in Volkswagen and Audi vehicles ensures compatibility with factory electrical harnesses and connectors, which facilitates installation and reduces the risk of communication issues with the engine control unit. By maintaining the original signal characteristics, the sensor works with the factory ECU software, supporting:

• correct short-term and long-term fuel trim adjustment,
• successful completion of diagnostic tests,
• elimination of common errors related to rich or lean mixtures.

Characteristics of the used component

The offered oxygen sensor is a used part, sourced from vehicle dismantling. This type of component represents a reasonable compromise between repair costs and maintaining performance close to factory specifications. In practice, this allows for:

• lower service costs compared to new parts,
• preservation of the original operating characteristics of the engine control system,
• quick replacement in case of errors related to sensor operation. Before installation, it is recommended to perform a standard vehicle diagnostic procedure and verify the electrical installation to rule out other causes of improper engine operation.

Benefits of using an oxygen sensor in the Oxygen sensors and O2 sensors category

Replacing a component from the Oxygen sensors and O2 sensors category in a 1.2 petrol engine allows for restoring proper mixture regulation, which in daily use translates into:

• smoother engine operation across the entire rev range,
• reduced risk of the "check engine" light coming on due to mixture errors,
• better throttle response and predictable vehicle behavior,
• maintaining catalytic converter efficiency through proper operating conditions. For users who want to consciously use used electronic components and sensors, practical tips on selection and installation may be useful. It is worth checking out the guide The second life of electronics – when is it worth choosing used engine controllers, comfort modules, and parking sensors?, which discusses key aspects of choosing used automotive electronics.

Volkswagen oxygen sensors and O2 sensors – system expansion

If you are planning a comprehensive repair or upgrade of the engine area in your Volkswagen and need other elements from the same group, such as additional sensors before and after the catalytic converter, O2 sensors in other sections of the exhaust system, or components supporting exhaust diagnostics, check the available parts in the Volkswagen oxygen sensors and O2 sensors category. This allows you to select a coherent set of components in one place, which facilitates service planning, reduces vehicle downtime, and helps keep the exhaust system and engine management at a stable, predictable level.