Differences in N55 between E series cars and F series cars

Frostydc4

New Member
Dec 10, 2016
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Whats the difference (engine internals and turbo) between the N55 applications in the E series cars and the F series cars? Thanks!
 

Joe

Specialist
Nov 1, 2016
58
62
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Arizona
"The N55 in the F22 M235i has three enhancements over the normal N55.

1. Software update
2. Revised camshaft
3. Revised exhaust"

- The Internet

Also, the ECU is different. E series can be flashed via MHD. F series requires a one time unlock and then can be flashed with bootmod3.
 
Last edited:

Bnks334

Lieutenant
Dec 1, 2016
505
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New York
That is the pdf for the n55 in the e-series.

I'm sure bmw Academy (where the pdfs were sourced from) has since produced another n55 pdf for the F series that outlines the engineering improvements over the outgoing e-series n55.

There are probably many more technical differences between the engines. Just like how people think n54 and n55 are the same engine yet they are technically 2 completely different animals.

 

Joe

Specialist
Nov 1, 2016
58
62
0
Arizona
That is the pdf for the n55 in the e-series.

I'm sure bmw Academy (where the pdfs were sourced from) has since produced another n55 pdf for the F series that outlines the engineering improvements over the outgoing e-series n55.

There are probably many more technical differences between the engines. Just like how people think n54 and n55 are the same engine yet they are technically 2 completely different animals.

The PDF references both M0 and O0 models of the N55... Both of which found themselves in several F series cars.
 
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Flinchy

Private
Nov 5, 2016
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Australia
"The N55 in the F22 M235i has three enhancements over the normal N55.

1. Software update
2. Revised camshaft
3. Revised exhaust"

- The Internet

Also, the ECU is different. E series can be flashed via MHD. F series requires a one time unlock and then can be flashed with bootmod3.
Close

Only the 2011 e series can be flashed. The rest need a bench unlock just the same.
 

Cjdzombie

Specialist
Feb 27, 2017
72
12
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Ride
2011 335i xDrive M-Sport
I read that the newer N55s have and the M cars have a bigger turbo..
 

niceast

New Member
Jan 27, 2018
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2011 e82 n55 have different fuel pumps than late-n55 2012+
(2011 shares same Hpfp as n54 2007-2010 but never got the extended warranty to 100k/10yrs under service bulletin 130309, who know why its was overlooked... *scream)

Video of Hpfp @ 4:10 by fcpeuro "n55 problems"