Genuine OEM Volkswagen Throttle Body, part number 03L128063S. This critical component is responsible for regulating the precise amount of air that enters the engine's intake manifold, directly impacting engine power and fuel efficiency. It typically features a butterfly valve controlled by an electronic actuator. Weighing 0.751 kg, this throttle body is constructed from durable metal alloys and contains sensitive electronic components. Using a genuine OEM throttle body ensures accurate air metering, proper engine response, and seamless integration with the engine management system, vital for optimal performance and emissions control.