Genuine OEM Volkswagen Lambda Probe, part number 03H906262AR. This sensor measures oxygen content in exhaust gases, providing crucial data to the engine control unit for optimizing fuel injection and ignition timing. Proper functioning of the lambda probe is essential for maintaining fuel efficiency and reducing harmful emissions. It is typically installed in the exhaust manifold or pipe. Genuine OEM lambda probes are manufactured to exact specifications, ensuring accurate readings and long-term durability.