The Genuine Audi Master Cylinder Return Line is a high-quality replacement part for Audi vehicles. It is designed to be compatible with the 6Q1721453C model and is made from durable materials to ensure long-lasting performance. This return line is an essential component of the vehicle's braking system, responsible for returning brake fluid from the master cylinder back to the reservoir. It is a genuine OEM part, ensuring a perfect fit and reliable operation. This product does not contain any newline characters and can be used as input in other API calls without any modifications.