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 2009 2021 2020 2019 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2004 2003 2002 2001 Choose your Audi Model A 2009 A3 Knock Sensor 2009 A3 Quattro Knock Sensor 2009 A4 Knock Sensor 2009 A4 Quattro Knock Sensor 2009 A5 Quattro Knock Sensor 2009 A6 Knock Sensor 2009 A6 Quattro Knock Sensor Q 2009 Q5 Knock Sensor 2009 Q7 Knock Sensor S 2009 S4 Knock Sensor 2009 S6 Knock Sensor 2009 S8 Knock Sensor T 2009 TT Knock Sensor 2009 TT Quattro Knock Sensor 2009 TTS Quattro Knock Sensor