Genuine OEM Audi Lambda Probe, part number 03L906262. This sensor, also known as an oxygen sensor, measures the amount of oxygen in the exhaust gases. It is typically installed in the exhaust system. The probe features a robust construction designed for the harsh exhaust environment, including a sensing element and a connected wiring harness. Genuine OEM lambda probes provide accurate and reliable data to the engine control unit, crucial for optimizing fuel combustion and emissions control.