bmw. Secondary Air Injection Control Valve Fitment Notes: N51B30A Engine. 2008 - 2013 128i. 2007 - 2013 328i Convertible Coupe 2007 - 2013 328i 2007 - 2011 328i Sedan 2009 - 2013 328i xDrive Coupe 2009 - 2011 328i xDrive Sedan Coupe 2007 - 2008 328xi. 2007 - 2008 328xi Sedan