Genuine OEM Audi brake hose, part number 5QB614739D. This hose serves as a critical connection between the master cylinder and the hydraulic system, facilitating the transfer of brake fluid under pressure. It is positioned in the brake system assembly. Constructed from durable materials to withstand high pressures and environmental factors, ensuring a long service life. Genuine OEM brake hoses are essential for maintaining the precise feel and responsiveness of the braking system, with exact internal diameters and material composition to prevent swelling or premature failure.