Quote:
Originally Posted by nextelbuddy
my new to me 4.8is had the fuel pump replaced 2 years ago for $650ish dollars...it died on me a few days after taking ownership. I removed it and found that they did not use an OEM fuel pump, it was a generic 3rd party pump that had no markings on the pump itself. literally a no name brand pump and sending unit for $600+ dollars what? lol
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LOL yeah! Amazing, isn't it. I found similar stuff all through my 3.0i, where the PO got ripped off time and time again by dealers and indy's alike. Un-necessary work done. Work that should be done skipped. Lots of jobs billed and not done. For my car though, when they actually did stuff, they almost always did use genuine BMW parts.
My pump wore out at 174k miles about a year after I got the car. It is made by Pierburg, which was later bought out by TI Automotive. So my replacement pump said Pierburg on the box, sealed with a hologram sticker, and then TI Automotive (and no Pierburg) was stamped in the aluminum body of the pump.
I cut open the failed pump and confirmed it looked perfect except that one of the brushes had worn all the way down. So it simply wore out. Predictable. I also saved the old one, and pulled it out earlier to look for the check valve.
The valve is in the top plastic portion where the fuel exits. When I tried to blow back into that tube, it's absolutely blocked solid. Very simple, but I can imagine if you got a non-Pierburg pump it's the sort of simple easy thing that someone might try to save a few pennies using cheaper materials that maybe melt in the presence of ethanol? Kidding, but not completely.
I changed my filter when I put in the new pump. Maybe un-needed, but I did it anyway. Good chance for you to inspect the brake lines, etc. down there.
Good luck. No real advice from me here, just some info that might help.