Genuine OEM Audi Brake Line, part number 4E0611741R. This rigid brake line is designed to transport hydraulic fluid under high pressure from the master cylinder or distribution block to the brake calipers or wheel cylinders. It is located within the brake hydraulic system. Genuine OEM brake lines are manufactured with the correct routing geometry and corrosion-resistant materials to ensure consistent hydraulic pressure and long-term safety under extreme braking conditions.