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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 > 1M HPFP Different than 335i



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      01-03-2012, 10:00 PM   #1
sdstatestud88
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1M HPFP Different than 335i

I have heard a couple of rumors that the 1M hpfp is better than the current one in our 135/335 regardless if you have the original or most current one.

Can anyone confirm this?
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      01-03-2012, 11:04 PM   #2
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Yes it is better apparently, should flow more as well.
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      01-03-2012, 11:18 PM   #3
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obvious next question would be is it interchangeable?
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      01-03-2012, 11:44 PM   #4
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Quote:
Originally Posted by rudebwoi View Post
obvious next question would be is it interchangeable?
yes , i think actually all new pumps have the same code as the 1M, check on realoem.com
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      01-04-2012, 12:09 AM   #5
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Problem is, not all N54s are running the same HPFP without problems...

Same engine not even same pump lol
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      01-04-2012, 01:42 AM   #6
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The new pump I believe is called hpep or marketing purposes or high pressure exchange pump but it's the same crap and if you get your pump changed enough you will end up with this one the problem is that the hpfp is not the only issue in the fuel system but most other component benefit when it's replaced with a new one
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      01-07-2012, 12:22 AM   #7
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The newest n54 pump is from the 1m. The part number ends in 170. I had the 933 pump for 10k miles before the long cranks started. I was not throwing any codes, but the dealer changed the pump with the 1m part without question.
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      01-07-2012, 12:39 AM   #8
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While we're on the subject, were there any 1M's with failed or failing pumps yet?
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      01-07-2012, 12:45 AM   #9
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How long have then been using the 1M pump?

I went from having pump issues every 2 months to not having an issue the past 4-6 months
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      01-08-2012, 01:05 AM   #10
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Quote:
Originally Posted by onebadmofo View Post
While we're on the subject, were there any 1M's with failed or failing pumps yet?
+1

Also whoever does this upgrade first needs to figure out how to use the 1M's fuel lines as well, since they actually incorporate a fuel filter...
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