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Old 02-10-2013, 12:33 AM
johanness johanness is offline
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Location: Vancouver, BC
Join Date: Sep 2010
Posts: 32
Mein Auto: 08 Z4MC
Originally Posted by nospam View Post
According to the folks on the F30 forum, BMW switched to the electronic wastegate on the N20 engines July 2012. and RealOEM are generally pretty accurate and it seems that all US X1 28i have N20 and no N26. I will try and find where this is stamped on the engine and take a picture. Bottom line is...this greatly simplifies the BMS Stage 1 install/uninstall.
Look on your engine:

N26 is SULEV
N20 is ULEV
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