2004 BMW R1150RT Fuel Filter.

You must remove the fuel tank to replace the fuel pump. This is no fun without a car lift and much heavy equipment is needed and a good amount of car repair knowledge and a full set of hand tools. If you have none or very little of the listed things then leave it to and expert.. DONOT USE ANY TOOLS THAT CAN SPARK.

The fuel filter is serviced only as part of the left fuel level sensor assembly in the fuel tank

1. Remove rear seat bench

2. Fold carpet forwards

3. Fold back rubber mat

4. Remove the nuts and fold back metal cover

5. Disconnect electrical connector

6. Release and disconnect fuel feed and return lines

CAUTION: The fuel gauge must roughly indicate zero before the left tank opening is opened. Large quantities of fuel may emerge upon opening. If necessary, keep the left tank opening closed and feed an extraction hose through the right service opening to the left tank half and drain the fuel out of the left tank area before proceeding.

7. Release the screw cap

8. Carefully raise fuel level sensor until sensor flange emerges.

CAUTION: Risk of breakage! When raising sensor unit, do not pull excessively on connecting piece of fuel return line.

9. Disconnect line to fuel filter

10. Disconnect suction jet pump from fuel filter (Press catch downwards to detatch suction jet pump)

11. Remove left sensor unit from the tank.

12. Reverse order to install

Carburator clean up could help solve the problem, it seems some dirt may have entered the float chamber!
Blow the jets with compressed air.
Hope this helps!

I need also,told by main agent filter is adjacent to passenger ns
sill,there is a cover there,looks like the big one over the underside?
will post after I do the job KJ

absolutely you can take off the splash sheids in fender and you can take off the oil filter please rate my response thank you very much

There are six fuse panels for an E39 BMW
Fuses F1 - F45, fuse panel 1, glove compartment. Twist white plastic retainers 90 degrees and pull down from top of glove compartment.
Fuse 31 (10 amp) protects fuel pump relay(K96)

Fuses F46 - F6, fuse panel 2, trunk located behind right side luggage compartment interior panel.
Fuse 54 (15 amp) protects fuel pump relay(K96)

Before I would do any of the following, I would check the above fuses and put a bottle of HEET into the fuel tank. Fuel filter changing is not hard, but it will take you about an hour.
The fuel pump is another story (BMW has a special spanner wrench(16 1 020) to remove and install the threaded collar.

E39 BMW use a two-lobed fuel tank(think saddle bag like). Each with its own fuel level sending unit that has a float connected to a variable resistance wiper contact. To equalize fuel level between the two tank lobes, a siphon pump is installed in the left lobe. The resistances need to be approximately the same. The fuel pump is on the right lobe under the tank sending unit beneath the threaded collar at the top of the fuel tank which is accessed by removing the rear seat cushion. WARNING When removing the fuel level sender or the fuel pump, the fuel tank should be drained to 1/4 capacity or below. The fuel in the fuel line is under pressure (45-75 psi). Always unscrew the fuel tank cap to release pressure in the tank before working on the tank or lines. Disconnect battery negative cable.

The fuel filter is located beneath the center of the car near the driver's seat usually under a protective metal cover held on by small screws. Not hard to replace but car will need to be on jack stands and 1/4 tank or less of fuel in the tank. Definitely wear safety goggles or face shield as the fuel will come out on face. Have a fuel catch pan under the filter. Clamp the fuel line before and after the fuel filter(long metal cylinder) before loosening hose clamps. Loosen center clamping bracket and hose clamps on either end of filter. [Some have an inline fuel pressure regulator.(Remove vacuum hose, pull out locking clip, remove fuel pressure regulator).]
Drain fuel from inlet side of filter and check fuel for rust moisture or other contaminats.
Installation is reverse. When installing fuel filter, ensure fuel flow direction arrow points to front. Should have at least 5 liters of fuel in tank before restarting. The fuel pump will be damaged if run without fuel.
PT Stanley