Quote:
Originally Posted by SCBMW02
It does get confusing. I thought the 35is was the only N54 engine, same as in the 335is and 1 M Coupe'. Going forward, will the is models stay with the N54 or will all eventually have the twin scroll N55?
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There is much confusion over this, having owned both a 2011 and 2012 3.5i both have N54.
Check
WWW.REALOEM.COM and it will show N54.
http://www.realoem.com/bmw/select.do...&trans=&arch=0
Funny thing is the BMW Sales force many times think its not. But check the parts counter and you will find its N54.
Other N54 info, BMW changed mid 2010 1 series *(non-M). It changed from N54 March of 2010 to N55.
I have a Feb 2010 build 1 series, it has the N54, next month they switched mid year production to N55. Again USA data.