The movement of liquids within a vehicle's various systems. This encompasses the components and processes involved in circulating essential fluids like fuel, oil, coolant, and brake fluid. It involves pumps, hoses, lines, and reservoirs, all designed to ensure the efficient and reliable delivery of fluids to their designated locations. Proper fluid transfer is crucial for maintaining engine performance, cooling, lubrication, and braking functionality, contributing to the overall health and safety of the vehicle.