Genuine OEM Audi Catalyst Lambda Probe, part number 4L0906262K. This sensor is crucial for monitoring oxygen levels in the exhaust gases, enabling the engine control unit to adjust fuel mixture for efficient combustion and reduced emissions. It is positioned on the front right side of the exhaust system, typically before the catalytic converter. Weighing approximately 0.18 kg, this sensor is built to OEM specifications. Genuine OEM sensors ensure accurate signal characteristics and factory calibration, which is vital for maintaining proper engine function and meeting emission standards.