Here a picture of a low pressure fuel pump,,,this is a recall fuel pump,,,there was a problem internally with the original fuel pump.
Here is the picture under the rear car seat,,,,there is just the one fuel line,,,,and one electrical plug connector,,,,notice the big metal locking ring,,,that locks in the fuel pump.
The fuel pump comes complete,,,,even with the fuel level sender.
Ok I know how you guys like BMW tools,,,,here the special fuel pump removal tool,,,,,this big spanner tool lock onto that big locking ring,,,,and you will need a breaker bar to loosen and tighten the fuel pump locking ring.
Here you can see the four locking pins on the tool,,,that locks onto the locking ring,,,,,,ok you didn’t here it from me OK,,,,,lol,,,,but you don’t need this tool,,,,you can use a hammer and big screw driver and hit the locking ring.,,,,when doing this you have to be very very careful not to puncture the plastic fuel tank,,,,it has been done,,,I have seen a tech do it,,,,,just made for a really long day.