Genuine OEM Volkswagen Lambda Oxygen Sensor, part number 04E906262CR. This sensor is crucial for measuring the oxygen content in the exhaust gases, providing data to the engine control unit for precise air-fuel mixture adjustments. It is typically located in the exhaust system, either before or after the catalytic converter. Weighs approximately 0.16 kg. Using a genuine OEM oxygen sensor ensures accurate signal characteristics and proper calibration, which is vital for maintaining optimal engine efficiency and meeting emissions standards.