Originally Posted by bdaddylo
So you're saying the 2012 Z4is has the N55 and not the N54???
Why do you think that the 1M - despite being produced until Jan 1 2012 was labeled as a 2011 model?
It was to delay the onslaught of the federal regulations.
And to my knowledge it is. I just double checked BMW's website and they label it as a "TwinPower Turbo" and thats what they label the N55 as in media.