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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > Less fuel pump failures



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      07-03-2007, 07:03 PM   #1
BzzzBom
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Thumbs up Less fuel pump failures

Over the last month the number of posts regarding fuel pump failures has dramatically decreased. I have noticed this on at least three BMW forums. With few exceptions it seems that the fuel pump failures were mostly on the 2006 build dates. Let's keep our fingers crossed.
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      07-03-2007, 07:17 PM   #2
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who is the supplier...Bosch or Siemens? Also, what is the problem?
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      07-03-2007, 07:22 PM   #3
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Quote:
Also, what is the problem?
They don't work correctly causing cars to become immobilize.

They only take 1-2 hrs to install, but takes 30+ days to get the part in.
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      07-03-2007, 07:45 PM   #4
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work correctly as far as...start or while driving?

while driving is bad... i.e., loss of pressure which results in low flow during heavy engine demand.
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      07-03-2007, 07:47 PM   #5
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Originally Posted by drexplode View Post
work correctly as far as...start or while driving?

while driving is bad... i.e., loss of pressure which results in low flow during heavy engine demand.
its the new high pressure pump for the direct injection... it goes out and the car goes into limp mode and shudders and stalls. My car was in the shop for 7 weeks with a dead pump...

got 2 months payments, a 335i loaner, and a free aerokit front lip painted and installed as compensation...
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      07-03-2007, 07:56 PM   #6
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nice compensation!!

does anyone know the supplier of the high pressure pump? Bosch, Siemens, Hitatchi?

Basically when the high pressure pump fails, you are relying on low-side fuel pump pressure which is probably 4-7bar which is certainly not enough considering during normal operation its 4-12Mbar. Obviously the injectors are designed to open with 4-12Mbar, not .4-.7Mbar. Limp-home mode = bad, potential walk home.
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      07-04-2007, 04:17 PM   #7
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I was told by my dealer that the problem has been fixed and newer production cars wont have any issues
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      07-04-2007, 05:02 PM   #8
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I wish I had my car back. It has been three weeks. No BMW Loaner either. I have Chrysler 300 which is not bad, but I want a BMW Loaner. I get the same song and dance about them changing fleets, etc.
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      07-04-2007, 05:24 PM   #9
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I wish I had my car back. It has been three weeks. No BMW Loaner either. I have Chrysler 300 which is not bad, but I want a BMW Loaner. I get the same song and dance about them changing fleets, etc.
what was you build date?
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      07-04-2007, 05:41 PM   #10
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OK so what's the new part number for this new pump?
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      07-04-2007, 05:42 PM   #11
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btw, i havent seen the decrease that you speak of and neither has my dealer.
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      07-05-2007, 02:00 AM   #12
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FWIW, BMWNA claims the HPFP is fixed in "newer" cars. They wouldn't give me an exact build date as a cutoff but I know that 2007 build dates have the problem also.
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      07-05-2007, 02:10 AM   #13
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I thought it was March 07'?

I would certainly hope that BMW has this problem fixed by now. I'm still waiting for an 08' model just to be safe, plus the new 16 speaker stereo doesn't hurt either..
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      07-05-2007, 09:07 AM   #14
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Quote:
Originally Posted by BzzzBom View Post
Over the last month the number of posts regarding fuel pump failures has dramatically decreased.
Maybe people finally learned how to you use the feature!
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      07-05-2007, 09:09 AM   #15
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Quote:
Originally Posted by drexplode View Post
nice compensation!!

does anyone know the supplier of the high pressure pump? Bosch, Siemens, Hitatchi?

Basically when the high pressure pump fails, you are relying on low-side fuel pump pressure which is probably 4-7bar which is certainly not enough considering during normal operation its 4-12Mbar. Obviously the injectors are designed to open with 4-12Mbar, not .4-.7Mbar. Limp-home mode = bad, potential walk home.
Siemens VDO was the maker of the pumps with the problem. If you guys want to do a "Search" you will find a bazillion threads on this with info that is still current.
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