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ehangeto4 ehangeto4 is offline
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Default N55 Engine Reliability and Performance - 09-23-2020, 06:35 AM

Looking to get a 2011 335i with the N55 engine. I've heard that the N54 is more tuner friendly, but it is prone to having issues with maintenance and reliability. I've heard that the N55 is less tuner friendly, but more reliable. Is the N55 engine still pretty bad in the reliability department in the grand scheme of things? What are some common problems with it? Anyone have any experiences with it? Thankshttps://nox.tips/ https://xender.vip

Last edited by ehangeto4; 09-24-2020 at 01:49 AM..
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hi rpm hi rpm is offline
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Car: 2013 335i xDrive Coupe
Default 09-24-2020, 12:31 PM

I haven't had engine problems but have had to replace more parts than I expected. Water pump, two diffs (xdrive) and the oil filter housing gasket is bad, all before 60k. The big pro for me as a half-ass modder is N55 already has a single turbo...But I'd probably have more power with the same money on an upgraded N54 twin setup. Long story short if I was shopping today I think I'd prefer N54.
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skaper skaper is offline
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Car: E90 N55
Default 10-18-2020, 09:22 PM

This is old but I wanted to pop on here and say that they are incredibly reliable. The bigger issue is avoiding preventive maintenance prior to go-fast parts. Mine is daily driven in the city and longer drives once to twice a week.

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