Genuine OEM Volkswagen Tandem Brake Master Cylinder, part number 1N3614019. This component converts the mechanical force from the brake pedal into hydraulic pressure to operate the brakes. It is a critical part of the hydraulic braking system. Weighing 0.546 kg, this master cylinder is essential for proper brake function. Genuine OEM master cylinders are manufactured to precise tolerances for consistent hydraulic pressure and reliable braking performance.