Mounted on top and inside the fuel tank.
The fuel pump in located in the fuel tank on a 1991 BMW 525i. This model of BMW uses an electric fuel pump.
It is inside the gas tank you can access it from a panel in the trunk
passenger side under hood behind strut in waterproof box
You will get the answer at this forum: http://bimmer.roadfly.com/bmw/forums/e32/
The fuel pump on my 1988 535i is right next to the back right tire. It is harnessed next to the fuel filter. I'm not sure if it would be there on your 7 series, but you could get under there with a flashlight and give it a look.
Yes, I actually used a 1991 535i seat and put it in my 1990.
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The electric fuel pump is located above the axel on the right side of the car looking at the vehicle from the rear. Remove that wheel and the fuel pump is next to the fuel filter; held in place by two (2) steel bands; use a screw driver to release them and the fuel pump. Then the two clamps - one at either end of the pump. When replacing the pump, the electrical connections are different sizes, so impossible to get wrong....
I beleave it's in the trunk next to the battery. it say "Fuel cut off" and it's a cable you pull.
where is located the fuel pump for the 1994 BMW 7 series