Genuine OEM Volkswagen Exhaust Gas Temperature Sender, part number 03L906088CQ. This sensor measures the temperature of exhaust gases exiting the engine. This data is crucial for the engine control unit to adjust fuel injection and ignition timing, ensuring optimal performance, fuel efficiency, and emissions control. It is typically located in the exhaust system before or after the turbocharger or catalytic converter. Genuine OEM parts ensure precise calibration and reliable operation, critical for emissions and engine longevity.