The DISA Valve adjusts the intake manifold runner length to improve performance. When it fails it can lead to a rough idle and perhaps a engine fault code light.
Fitment Guide
This item fits the following BMWs:
2008+ E82 BMW 128i - N51 engine
2006-2011 E90 BMW 328i 328xi 328i xDrive (N51) - 330i 330xi - Sedan
2006-2012 E91 BMW 328i 328xi 328i xDrive (N51)- Wagon
2007-2013 E92 BMW 328i 328xi 328i xDrive (N51)- Coupe
2007-2013 E93 BMW 328i (N51) - Convertible
2004-2010 E60 BMW 530i (N52) 530xi
2011+ F10 BMW 528i
2007-2010 E83 BMW 3.0si
2011 F25 BMW X3 xDrive28i
2007-2013 E70 BMW X5 3.0si
2003-2008 E85 BMW Z4 3.0si
2009+ Z4 BMW Z4 sDrive30i
Fitment
2006 BMW 330i
2006-2007 BMW 530i
2006-2007 BMW 530xi
2006 BMW 330xi
2006-2008 BMW Z4 Roadster 3.0si
2006-2008 BMW Z4 Coupe 3.0si
2009-2011 BMW Z4 sDrive30i
2007-2011 BMW 328i Body: Convertible, Engine code: N51B30A
2007-2011 BMW 328i Body: Coupe, Engine code: N51B30A
2007-2011 BMW 328i Body: Sedan, Engine code: N51B30A
2012-2013 BMW 328i 3.0L L6 Body: Convertible, Engine code: N51B30A, Chassis: E93, Position: Left
2012-2013 BMW 328i 3.0L L6 Body: Coupe, Engine code: N51B30A, Chassis: E92, Position: Left
2007-2008 BMW 328xi Body: Coupe, Engine code: N51B30A, Position: Left
2007-2008 BMW 328xi Body: Sedan, Engine code: N51B30A, Position: Left
2007-2010 BMW X3
2011-2012 BMW X3 xDrive28i
2007-2008 BMW X5 3.0si
2009-2010 BMW X5 xDrive30i
2008-2013 BMW 128i Engine code: N51B30A
2009-2011 BMW 328i xDrive Body: Coupe, Engine code: N51B30A
2009-2011 BMW 328i xDrive Body: Sedan, Engine code: N51B30A
2012-2013 BMW 328i xDrive 3.0L L6 Body: Coupe, Engine code: N51B30A, Chassis: E92
2011 BMW 528i