Genuine OEM Volkswagen Brake Fluid Reservoir, part number 1N3611301B. This reservoir holds the brake fluid for the vehicle's hydraulic braking system. It is located in the engine bay, typically near the master cylinder. The reservoir is made of durable plastic to withstand brake fluid and temperature variations. Genuine OEM brake fluid reservoirs ensure precise fitment and material integrity, crucial for the safety and reliability of your braking system.