Genuine OEM Audi Brake Hose, part number 4E0611721K. This brake hose is designed to connect the rigid brake line to the brake caliper housing, allowing hydraulic pressure to actuate the brakes. It is positioned at the wheel end of the braking system. The hose is constructed from reinforced rubber and metal fittings to ensure durability and safety under high pressure and varying temperatures. Genuine OEM brake hoses are essential for maintaining the correct fluid flow, preventing leaks, and ensuring consistent braking performance.