Genuine OEM Volkswagen Brake Fluid Reservoir, part number 7E0611301F. This essential component stores the hydraulic brake fluid, ensuring a consistent supply to the master cylinder for reliable braking performance. It typically includes a cap and a fluid level sensor for monitoring. Made from durable translucent plastic, it weighs 0.214 kg and measures approximately 0.21m x 0.115m x 0.085m. Using a genuine OEM brake fluid reservoir guarantees proper material compatibility with brake fluid, accurate fluid level sensing, and a leak-free seal, which are critical for brake system safety and longevity.