Genuine OEM Volkswagen Secondary Air Pump Stop Buffer, part number 06A133567F. This component is designed to dampen vibrations and securely mount the secondary air pump within the engine bay. It helps to reduce noise and prevent damage to the pump from excessive movement. Made from a durable rubber-like material with a threaded metal stud, it measures approximately 45mm in length. Using a genuine OEM buffer ensures the correct vibration absorption characteristics and precise fitment, contributing to the longevity and quiet operation of the secondary air pump.