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Fuel Delivery: Notes

Fig 1: Identifying Fuel Delivery Components
G03388692Courtesy of BMW OF NORTH AMERICA, INC.

Fuel Flow  : Right tank half => swirl pot => fuel pump => fuel filter => fuel rail.

The fuel is pumped into the right tank half. The swirl pot contains the electric fuel pump. Fuel passes through the valve incorporated in the base of the swirl pot into the swirl pot. When the fuel level is higher, fuel also enters the swirl pot from the top.

The electric fuel pump draws in the fuel from the swirl pot (fuel pump relay located in glovebox)  . It pumps the fuel into the fuel filter in the left tank half. The fuel flows from the fuel filter through the feed line to the fuel rail.