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      10-20-2016, 10:22 AM   #1
Hegge
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N55 HPFP Issue?

Since this is the N55 in the M2, what are the chances that the engine will develop an HPFP problem down the road? Should we be worried?
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      10-20-2016, 10:25 AM   #2
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HPFPs haven't been any kind of major issue in 5+ years.
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      10-20-2016, 10:40 AM   #3
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Thought the HPFP was a N54 issue.
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      10-20-2016, 10:58 AM   #4
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Quote:
Originally Posted by Bluenose-2er View Post
Thought the HPFP was a N54 issue.
This.
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      10-20-2016, 11:10 AM   #5
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Quote:
Originally Posted by Bluenose-2er View Post
Thought the HPFP was a N54 issue.
Quote:
Originally Posted by DivideBYZero View Post
This.
No it was certainly both. They use the same pump, afterall.

Not engine-dependent...but pump-version dependent.

That being said, they started figuring out the pump issues (switched manufacturers, etc.) soon after the intro of the N55. So by the time the N55 really got rolling, they had the pumps sorted, and less N55 pump failures occurred comparatively. But at the same time, cars still getting the N54 had less failures too...as they too received the updated pumps.

The injectors, yeah, that is an N54 issue with it's more sophisticated piezo setup.
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Last edited by PrematureApex; 10-20-2016 at 11:29 AM..
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      10-20-2016, 04:42 PM   #6
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Quote:
Originally Posted by PrematureApex View Post
So by the time the N55 really got rolling, they had the pumps sorted
So what's the point of this thread?
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      10-20-2016, 06:06 PM   #7
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Quote:
Originally Posted by DivideBYZero View Post
So what's the point of this thread?
that Hegge is a worry wart... I would bet he is still afraid to buy Audi ?


Seriously.. the N54 HPFP issues were pretty much sorted by the time the 1M came out.. in 2011..
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      10-20-2016, 07:50 PM   #8
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This thread gave me a 2008 flashback

I have 197,000 km on my N55 and have never had the HPFP issue.
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      10-21-2016, 03:50 PM   #9
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Quote:
Originally Posted by Bluenose-2er View Post
Thought the HPFP was a N54 issue.
Indeed, my 135i Coupe had it.
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