Fitment:

for BMW 128i 2008-2013 I6 3.0L N51B30A, N52B30A Upstream Cyl 1, 2,3 Only
for BMW 135i 2008-2010 I6 3.0L N54B30A Upstream Cyl 1, 2,3 Only
for BMW 323i 2006-2011 I6 2.5L Upstream Cyl 1, 2,3 Only
for BMW 325i 2006 I6 3.0L N52 Engine Upstream Cyl 1, 2,3 Only
for BMW 325xi 2006 I6 3.0L N52 Engine Upstream Cyl 1, 2,3 Only
for BMW 328i 2007-2013 I6 3.0L N51B30A, N52B30A Upstream Cyl 1, 2,3 Only
for BMW 328i xDrive 2009-2013 I6 3.0L N51B30A, N52B30A Upstream Cyl 1, 2,3 Only
for BMW 328xi 2007-2008 I6 3.0L N51B30A, N52 Eng Upstream Cyl 1, 2,3 Only
for BMW 330i 2006 I6 3.0L N52 Engine Upstream Cyl 1, 2,3 Only
for BMW 330xi 2006 I6 3.0L N52 Engine Upstream Cyl 1, 2,3 Only
for BMW 335i 2007-2010 I6 3.0L N54B30A Upstream Cyl 1, 2,3 Only
for BMW 335i xDrive 2009-2010 I6 3.0L N54B30A Upstream Cyl 1, 2,3 Only
for BMW 335is 2011-2013 I6 3.0L N54B30A Upstream Cyl 1, 2,3 Only
for BMW 335xi 2007-2008 I6 3.0L N54B30A Upstream Cyl 1, 2,3 Only
for BMW 525i 2006-2007 I6 3.0L N52 Engine Upstream Cyl 1, 2,3 Only
for BMW 525xi 2006-2007 I6 3.0L N52 Engine Upstream Cyl 1, 2,3 Only
for BMW 528i 2008-2010 I6 3.0L N52B30A Upstream Cyl 1, 2,3 Only
for BMW 528i xDrive 2009-2010 I6 3.0L N52B30A Upstream Cyl 1, 2,3 Only
for BMW 528xi 2008 I6 3.0L N52B30A Upstream Cyl 1, 2,3 Only
for BMW 530i 2006-2007 I6 3.0L N52 Engine Upstream Cyl 1, 2,3 Only
for BMW 530xi 2006-2007 I6 3.0L N52 Engine Upstream Cyl 1, 2,3 Only
for BMW X3 2007-2010 I6 3.0L N52 Engine Upstream Cyl 1, 2,3 Only
for BMW Z4 2006-2014 I6 3.0L N52B30A Upstream Cyl 1, 2,3 Only

Note:Please double check the years and models in the description to make sure it fits your vehicle before ordering and don't hesitate to contact us if you have any question.