Genuine OEM Volkswagen Tandem Main Brake Cylinder, part number 1K1614019L. This essential component is responsible for converting the mechanical force from the brake pedal into hydraulic pressure, which is then distributed to the wheel brakes. It features a robust metallic construction and is designed to provide reliable and consistent braking performance. Weighing 0.656 kg, it is a substantial part of the brake system. Using a genuine OEM main brake cylinder ensures precise internal tolerances, correct fluid displacement, and optimal pressure distribution for consistent and safe braking performance.