Genuine OEM Audi Coolant Pipe, part number 4E0121399G. This rigid pipe is an essential component within the engine cooling system, designed to transport coolant efficiently throughout the engine. It connects various hoses and components, ensuring proper circulation for temperature regulation. With a length of approximately 0.24 meters, it is engineered for a specific routing path. Opting for a genuine OEM coolant pipe guarantees it is manufactured from materials capable of withstanding high temperatures and pressures, preventing leaks and ensuring long-term cooling system reliability.