Audi A1 8X VW Polo 6R 1.4 TSI Petrol Lambda Oxygen Sensor 04E906262BA

Audi A1 8X VW Polo 6R 1.4 TSI Petrol Lambda Oxygen Sensor is a precision exhaust system component from the Lambda sensors and O2 sensors category, designed for petrol engines. It is responsible for the accurate measurement of exhaust gas composition, which allows the engine control unit to maintain a stable mixture and efficient operation of the powertrain. A used OEM part is a sensible choice when servicing VAG group vehicles if you are looking for factory fitment and controlled repair costs.

Specifications and technical data

• SKU: 04E906262BA
• Mark: Audi
• Condition: Used
• OEM Part Number: 04E906262BA
• Substitutable numbers: 04E906262BA, 04E 906 262 BA
• Fuel type: Petrol
• Category: Oxygen Sensors

Function of the lambda sensor in a 1.4 TSI petrol engine

The lambda sensor in a petrol engine plays a key role in the closed-loop control of the powertrain. The sensor monitors the oxygen content in the exhaust gases, and the control unit adjusts the fuel dose based on this data. As a result:

• an optimal fuel-air mixture is maintained for the 1.4 TSI engine,
• operation at idle and under load is stabilized,
• excessive fuel consumption is reduced,
• emissions of harmful exhaust components are decreased.

A functional lambda sensor also helps protect the catalytic converter from overheating and excessive load resulting from an incorrect mixture composition.

Compatibility with Audi A1 8X and VW Polo 6R

The presented sensor has been designed to work with 1.4 TSI petrol units used in the Audi A1 8X and VW Polo 6R. This ensures the maintenance of factory operating parameters, proper signal characteristics, and correct communication with the vehicle's electronics. Dedicated fitment for a specific engine family reduces the risk of control unit errors, adaptation problems, or incorrect mixture readings.

For the user, this means the ability to restore the proper operation of the fuel supply system without the need for universal replacements, which often require additional installation modifications.

Benefits of using an original lambda sensor

Choosing an original lambda sensor from the Lambda sensors and O2 sensors category for a petrol engine brings a number of practical advantages:

• preservation of factory signal characteristics for the engine control unit,
• stable operation of the powertrain across the full load range,
• reduction of the risk of diagnostic errors related to the mixture,
• better cooperation with the exhaust gas purification system.

A used OEM part is a compromise between quality and cost – you receive a component designed by the vehicle manufacturer while reducing expenses compared to a new component.

Condition, verification, and selection by part numbers

The item comes from dismantling and is offered as used, which in practice means the possibility of an economical repair while maintaining the original specification. Before installation, a standard diagnostic procedure is recommended, including checking the electrical installation, connectors, and potentially clearing adaptations in the engine control unit after replacement.

To make selecting the right lambda sensor as easy as possible, it is worth using the manufacturer's markings, the OEM number, and interchangeable numbers. In case of doubt, it will be helpful to compare the parameters with the currently installed sensor and verify compatibility with the specific version of the petrol engine.

If you want to better understand how to safely choose used sensors and electronic modules, check out our guide: Used automotive electronics – ECU modules and second-hand sensors, where you will find practical tips regarding selection by numbers, compatibility, and installation.

Expanding exhaust system service in Audi

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