The Vemo Volkswagen Secondary Air Injection Pump Check Valve (part number V10660011) is a component designed for use in Volkswagen vehicles. This check valve helps to regulate the flow of air in the secondary air injection system, which is responsible for reducing emissions from the vehicle's exhaust. It is an essential part of the vehicle's emissions control system and is specifically designed to fit and function properly in Volkswagen models. This product is manufactured by Vemo, a trusted brand in the automotive industry known for producing high-quality replacement parts.