TWO fuel pumps.. Really?

[Kristophe]

Xoutpost has been incredibly helpful with my 2001 X5 3.0 when tackling annoying issues such as the infamous Final Stage Relay dead battery in the morning syndrome and the driver's door Carriers Gone Kaput. But granted when the fuel pump went out at 140,000 I couldn't really hold that against her. I took it to an indy BMW shop my cousin takes his wife's X3 to but it died in the road a week later when my daughter was driving and had it towed back. Here's the kicker; he said there's actually another pump in the tank that pumps low fuel volume to the main fuel pump and it now must be out and wanted $300 to replace in addition to the $500 plus I already paid for the main fuel pump replacement. I passed on the offer and I'm not finding any such "auxillary" fuel pump as a replacement part so is he pulling my leg? The truck does run great until it gets past the yellow light.

Thanks much in advance