[smadasam]

I have a 2011 E90 335i that just spun a rod bearing. It sounds like it may have also dropped a valve. In other words, I need a new engine.

I haven't found any definitive answers for this question but how interchangeable are the N55s from different years and chassis? I know that at some point the turbo went from PWG to EWG, so if I just use the old turbo, can I use a N55 from say a 2014 335i? When I was looking for a motor, it seemed like there was a difference in the motor going from production dates in 2010 and 2011 for the 2011MY. I suspect that maybe the oil pans might be different especially if you get a motor from a different chassis.

As far as I can tell, I can only buy a N55 produced in 2010 since my car was manufactured in 2010 and be 100% sure it will work. However, if I can get a N55 for other years, it would greatly improve my options. Maybe I could go a little newer with a N55 from a 2015 M235i for instance.

Thanks for your input!

[smadasam]

according to wikipedia, these all have the same engine code as my car:
N55B30M0

Applications:
2009–2017 F10/F11/F07 535i
2010-2013 E90/E91/E92/E93 335i
2010-2013 E82/E88 135i
2010–2017 F25 X3 xDrive35i
2011-2013 E70 X5 xDrive 35i
2011–2015 F30/F31 335i
2011–2014 E71 X6 xDrive 35i
2012–2015 E84 X1 xDrive35i
2013–2016 F32/F33/F36 435i
2014–2018 F15 X5 xdrive 35i
2014–present F16 X6 xDrive35i
2014–2016 F26 X4 xDrive 35i

maybe these are fine too?
N55B30

Applications:
2011–2018 F06/F12/F13 640i[13]
2012–2013 E82/E88 135is[14]
2012–2015 F20/F21 M135i[15][16]
2012–2015 F01 740i/Li

N55B30O0
Applications:

2013–2016 F22/F23 M235i
2015–2016 F20/F21 M135i LCI

N55HP
Applications:

2013–2015 F30 ActiveHybrid 3

N55B30T0

Applications:
2015–2018 F26 X4 M40i — 265 kW (355 bhp)
2016–2018 F87 M2 — 272 kW (365 bhp)

It would be cool to swap the N55 from a M2 if it would work.

[weehe126]

A N55 block is a N55 block. You might have to transfer everything over from your block, turbo, oil pan, oil filter housing etc. But it is still the same block. Closer to your original build year less that needs to be swapped.

[Pladi]

Originally Posted by smadasam

according to wikipedia, these all have the same engine code as my car:
N55B30M0

Applications:
2009–2017 F10/F11/F07 535i
2010-2013 E90/E91/E92/E93 335i
2010-2013 E82/E88 135i
2010–2017 F25 X3 xDrive35i
2011-2013 E70 X5 xDrive 35i
2011–2015 F30/F31 335i
2011–2014 E71 X6 xDrive 35i
2012–2015 E84 X1 xDrive35i
2013–2016 F32/F33/F36 435i
2014–2018 F15 X5 xdrive 35i
2014–present F16 X6 xDrive35i
2014–2016 F26 X4 xDrive 35i

maybe these are fine too?
N55B30

Applications:
2011–2018 F06/F12/F13 640i[13]
2012–2013 E82/E88 135is[14]
2012–2015 F20/F21 M135i[15][16]
2012–2015 F01 740i/Li

N55B30O0
Applications:

2013–2016 F22/F23 M235i
2015–2016 F20/F21 M135i LCI

N55HP
Applications:

2013–2015 F30 ActiveHybrid 3

N55B30T0

Applications:
2015–2018 F26 X4 M40i — 265 kW (355 bhp)
2016–2018 F87 M2 — 272 kW (365 bhp)

It would be cool to swap the N55 from a M2 if it would work.

Good time to have this problem as a member is doing this exact swap on the n55 engine forum side. Follow his build. Ask him questions. Work with him. He is very knowledgeable. Since you both are doing the same thing it would be wise to contribute and share knowledge


There are a few components that are not direct swaps like fuel pump from the f platform. So you have to do some homework.

[smadasam]

Does anyone know specifically what would need to be done to use the M2's N55 in a E90?

[cranelec]

stay tuned and find out along with me...

https://www.e90post.com/forums/showthread.php?t=1629892

[wadraday]

I’m currently swapping a n55 from a 2014 335i into my e92. I’m swapping over the entire pwg system including the vacuum pump and turbo, ect. So essentially I’m just using it for the block and head. So far everything has matched including motor stands and other brackets. But one thing that looks off is the bell housing bolt holes. The pattern is the same and the bolts are the same but noticed two nipples on the new motor while the old one has one. I’m wondering if I can remove the one that doesn’t match? If anyone knows anything about them or know how to remove them lmk.

[RoarinForeign]

Those “nipples” are called dowels I believe. They’re used for alignment.

I have no experience with what you’re doing, but when I’ve done head gaskets on m5x motors there’s two of those that make sure the motor is aligned properly so it doesn’t move/ all the weight isnt on the bolt. They should pull out with some vice grips but better to have than not if you can, one would probably be better than none.

Looking forward to seeing your results. Best of luck!