Home/Shop by Part/Engine & Engine Management/Engine Sensors & Electrical/Knock Sensor Narrow The Number Of Models Shown By Telling Us The Year Filter Models by Year 2004 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 2000 1999 1998 1997 Choose your BMW Model # 2004 545i Knock Sensor 2004 645Ci Knock Sensor 2004 745i Knock Sensor 2004 745Li Knock Sensor X 2004 X5 Knock Sensor