Genuine OEM Audi Brake Line, part number 8E0611721B. This rigid metal line is a critical component of the hydraulic braking system, responsible for transmitting brake fluid pressure from the master cylinder to the front left brake caliper. It ensures consistent and reliable braking performance. The line is pre-bent to factory specifications for precise installation. Using a genuine OEM brake line guarantees the correct material strength, corrosion resistance, and exact routing, which is paramount for brake system safety and integrity.