Genuine OEM Volkswagen Lambda Probe, part number 04E906262CB. This oxygen sensor monitors exhaust gas content to optimize fuel injection and emissions. It is typically located in the exhaust manifold or downpipe before the catalytic converter. The lambda probe measures the oxygen level in the exhaust gases, providing crucial data to the engine control unit (ECU) for adjusting the air-fuel mixture. Genuine OEM lambda probes are manufactured to exact specifications, ensuring precise calibration for optimal engine performance and emissions control.