...running your car constantly on low or on Reserve.The fuel pump is a common issue not only with bimmers. What are the main reasons for making this to happen?
notice that the pump is made up of a small motor that drives the pump; and the motor runs on (composite) plastic bearings. the bearings somehow rely on gasoline(fluid) for lubrication.
Deprive them of lubrication(the gasoline in your tank) and it's just a matter of time before the pump goes bad .