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BMW 3-Series (E90 E92) Forum > BMW E90/E92/E93 3-series General Forums > General E90 Sedan / E91 Wagon / E92 Coupe / E93 Cabrio > Another N55 HPFP Failure



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      03-08-2013, 03:14 PM   #1
BMW6Speed
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Another N55 HPFP Failure

Guess it was stupid to think it wouldn't happen to me because I have the 2011 n55. My fuel pump failed, had to bring it to the dealer to get it fixed, took a few days and now it's back and running like new. A lot of you guys say that there are symptoms before it fails but I didn't get any. It was perfectly fine then one day I was at a stop sign ready to go, get off the clutch in first and all of a sudden the car starts chugging at around 4500 rpms and just stalls in the middle of the road. When I started it back up there was the infamous icon on the dash. It started up fine, but after that every time I got on it the car felt like it had lost 100 hp, limped all the way home. I did have a jb3 and bms intake, maybe the extra power sped up the process of it failing. Whatever, pay to play right? Car has about 30,000 miles on it. Just put everything back in my car and bought AR Dp's to boot, hopefully it doesn't fail again!
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      03-08-2013, 03:45 PM   #2
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I'm curious if the F30 has these same issues that e9x turbo engine has? Because in a year I'm planning on buying one.
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      03-08-2013, 10:17 PM   #3
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Quote:
Originally Posted by BMW6Speed View Post
Guess it was stupid to think it wouldn't happen to me because I have the 2011 n55. My fuel pump failed, had to bring it to the dealer to get it fixed, took a few days and now it's back and running like new. A lot of you guys say that there are symptoms before it fails but I didn't get any. It was perfectly fine then one day I was at a stop sign ready to go, get off the clutch in first and all of a sudden the car starts chugging at around 4500 rpms and just stalls in the middle of the road. When I started it back up there was the infamous icon on the dash. It started up fine, but after that every time I got on it the car felt like it had lost 100 hp, limped all the way home. I did have a jb3 and bms intake, maybe the extra power sped up the process of it failing. Whatever, pay to play right? Car has about 30,000 miles on it. Just put everything back in my car and bought AR Dp's to boot, hopefully it doesn't fail again!
That really sucks - based on all of these stories lately, I'm just waiting for mine to go soon! Sigh...
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      03-09-2013, 09:56 PM   #4
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Question-does running one of the various aftermarket tunes increase the fuel pump demands? I honestly don't know...new to the DI world but I would think it does indeed tax the fuel pump more.

Subscribing...good luck to you with your repair.
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      03-12-2013, 06:05 AM   #5
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18k on my clock and I have had a couple of small issues including 2 stalls and 3 very strange long cranks. No CEL, brought to dealer and of course they couldn't duplicate issue so they have to wait for CEL to move further. With my luck...I will need it replaced at 51k.
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      03-12-2013, 06:15 AM   #6
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My 2011 has 28K on the clock and I am getting the symptoms of it going out AGAIN. Already had it replaced at 12,000 miles. What kind of car needs fuel pumps replaced more often than oil changes?
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      03-12-2013, 09:50 AM   #7
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The reprogramming for the N54 engine seems to have corrected the HPFP issue. On N55 engines I would have expected the same thing was done.
What has killed the HPFP was the cavitation of the HPFP which ruined it. All caused by the signals to the LPFP not providing adequate fuel which runs the HPFP dry (cavitation) and kills it.
We are going to experience some pump failures as a course of reliability given the number of pumps out there.
Hope these are just a few rare cases...
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      03-12-2013, 11:55 AM   #8
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So if lack of fuel supply from the LPFP to the HPFP is the root cause of failure, has anyone at or near stock HP levels upgraded the LPFP as preventitive maintenance?
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      03-14-2013, 12:59 AM   #9
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I believe the HPFP thread states that tunes do not affect the life of the HPFP and I believe for the most part the HPFP is fixed now but it does have a 100k mile warranty or so.
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      03-14-2013, 07:43 AM   #10
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Sorry to hear that bro.

Bought my 2010 335i new and it never had a failure with the original HPFP. In late 2011, I brought it in for replacement via the mandatory recall and still no issues. I guess I am one of the fortunate ones.

Best of luck.
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      03-14-2013, 09:23 AM   #11
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Quote:
Originally Posted by BMW6Speed View Post
Guess it was stupid to think it wouldn't happen to me because I have the 2011 n55. My fuel pump failed, had to bring it to the dealer to get it fixed, took a few days and now it's back and running like new. A lot of you guys say that there are symptoms before it fails but I didn't get any. It was perfectly fine then one day I was at a stop sign ready to go, get off the clutch in first and all of a sudden the car starts chugging at around 4500 rpms and just stalls in the middle of the road. When I started it back up there was the infamous icon on the dash. It started up fine, but after that every time I got on it the car felt like it had lost 100 hp, limped all the way home. I did have a jb3 and bms intake, maybe the extra power sped up the process of it failing. Whatever, pay to play right? Car has about 30,000 miles on it. Just put everything back in my car and bought AR Dp's to boot, hopefully it doesn't fail again!
How has everything been since? Have you had any RPM surges at all? That's what I'm running into now which makes me believe I'm on my way there...

Curious - what is your build date? Mine is 05/2011.
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      05-04-2013, 01:49 PM   #12
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My 2011 335i HPFP failed too after 30K. Did not go into limp mode. Just long crank. I got a bit of surge taking off, but it was like that from day one, and sometimes the engine felt harsh. Dealer replaced my original 13-51-7-613-933 HPFP with 13-51-7-616-446. It is supposed to be the 4th revision. Not sure how it differs from the other 446's. Gas mileage and drivability are improved now.
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