Genuine OEM Audi Exhaust Gas Temperature Sender, part number 03L906088AQ. This sensor measures the temperature of the exhaust gases. It is typically located in the exhaust system before or after a catalytic converter or DPF. Accurate temperature readings are crucial for the proper functioning of the engine management system, emissions control, and turbocharger operation. Genuine OEM parts are manufactured to exact specifications for optimal performance and longevity.