The fuel system consists of fuel pump, fuel filter, fuel tank, fuel injectors and so on. Each component is necessary and plays a crucial role in running your BMW car. The fuel tank, as the name implies, acts a container for fuel. When you fill up your car at gas station, the gas goes down the filler tube and into the tank. There is a sending unit inside the fuel tanking reading how much gas is in the tank and send it to gauge panel for you. The fuel tank has become more complicated since the technology improves. It now often holds the fuel pump and has more emissions controls to stop vapors leaking into the air. There is a possibility that the sending unit cannot read the volume precisely or it fails to send information. Or there is a leakage in your fuel tank. You will drive your car with little gas which causes damage to your engine. Please check your fuel system, including fuel tank, regularly. Once you need to change, welcome here to shop BMW genuine OEM fuel tank with a discounted price.