Genuine OEM Audi Brake Vacuum Pipe, part number 4K0611931AH. This pipe is a vital component of the braking system, responsible for transmitting vacuum pressure from the engine to the brake booster. This vacuum assistance significantly reduces the effort required to apply the brakes. It is a rigid pipe with integrated flexible sections and fittings. Weighing 0.116 kg and measuring 0.495 m in length, this pipe is manufactured from durable plastic and rubber. Using a genuine OEM brake vacuum pipe ensures precise fitment, proper sealing, and resistance to vacuum collapse, which is critical for consistent and safe braking performance.