What is that white gupe in the hole? Take an easy out and thread it into the hole and spin out the female part of the connector. This portion is tricky installing a new one. Too tightly threaded into the fitting on the tank will split it. This split is common and a silent recall by bmw. They will either put an outside clamp on the boss or give you a new fuel pump. Beemerboneyard will sell you the parts you need. The retention clip one has to push in to release the male portion has sharp edges. So Be sure to push the retention clip in while installing the mail portion that has an O-ring on it. If not the O-ring gets clipped and nicked, leaks can happen. You have to be oh so careful with the plastic ones. The O-ring in question is a #11. I have a bag of them if someone needs a fresh one.
Mount Vernon, WA.
tire guy, I'll mount your tires.