Compatible Models:
Fit for 2008-2010 BMW 135i Base E82 3.0L
Fit for 2008-2010 BMW 135i Base E88 3.0L
Fit for 2011 BMW 1 Series M Base E82 3.0L
Fit for 2007-2010 BMW 335i Base E93 3.0L
Fit for 2007-2010 BMW 335i Base E90 3.0L
Fit for 2007-2010 BMW 335i Base E92 3.0L
Fit for 2011-2013 BMW 335is Base E93 3.0L
Fit for 2011-2013 BMW 335is Base E92 3.0L
Fit for 2007-2008 BMW 335xi Base E90 3.0L
Fit for 2008 BMW 335xi Base E92 3.0L
Fit for 2008-2010 BMW 535i Base E60 3.0L
Fit for 2009-2010 BMW 535i xDrive Base E60 3.0L
Fit for 2008 BMW 535xi Base E60 3.0L
Fit for 2008 BMW 535xi Base E61 3.0L
Fit for 2009-2016 BMW Z4 sDrive35i E89 3.0L
Fit for 2011-2016 BMW Z4 sDrive35is E89 3.0L
Fit for BMW E60 535i N54 3.0L
Fit for BMW E60 535xi N54 3.0L
Fit for BMW E61 535xi N54 3.0L
Fit for BMW E82 1 Series M Coupe N54 3.0L
Fit for BMW E82 135i N54 3.0L
Fit for BMW E88 135i N54 3.0L
Fit for BMW E89 Z4 sDrive35i N54 3.0L
Fit for BMW E89 Z4 sDrive35is N54 3.0L
Fit for BMW E90 335i N54 3.0L
Fit for BMW E90 335xi N54 3.0L
Fit for BMW E92 335i N54 3.0L
Fit for BMW E92 335is N54 3.0L
Fit for BMW E92 335xi N54 3.0L
Fit for BMW E93 335i N54 3.0L
Fit for BMW E93 335is N54 3.0L

Part Number: 11-15-7-553-949, 11 15 7 553 949, 11157553949
This hose runs from the valve cover to the intake manifold on the N54 engines - E82 135i, E90/E92/E93 335i/335xi, and E60 535i/535xi.
It's part of the crankcase vent system (CVV) and carries oil vapor out of the valve cover and into the intake manifold.