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Originally Posted by e9duece
So in a 2009 e92 are N54 and N55 motors available? Are parts interchangeable between the N54 and N55s?
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Model year 2007-2010 = N54
Model year 2011 onward = N55
Engine wise, most parts are not interchangeable since the engine designs are completely different.
N54 engine bay
N55 engine bay
