NGK Audi A4 Quattro 2009 Direct Fit Oxygen Sensor

NTK is the world's largest supplier and manufacturer of OEM oxygen sensors. Oxygen sensors play a critical role as part of the vehicle's on-board diagnostic system in maintaining optimal engine performance, maximizing fuel efficiency and reducing harmful emissions. Providing constant closed loop feedback to the ECU, oxygen sensors help to control the air-fuel ratio while alerting OBDII systems of possible problems with fuel delivery or catalytic converter efficiency. A ceramics company at our core, NTK uses state-of-the art technology enabling control of the ceramic element used in our oxygen sensors from raw material to finished product. Trust The Sensor Specialist for full-line market support and OE application technology.This Part Fits: Year Make Model Submodel 2009 Audi A4 Quattro Base 2008-2010 Audi A5 Quattro Base 2012-2014 Audi A6 Quattro Premium 2012-2015 Audi A6 Quattro Premium Plus 2012-2015 Audi A6 Quattro Prestige 2012-2013 Audi A7 Quattro Base 2014-2015 Audi A7 Quattro Premium Plus 2014-2015 Audi A7 Quattro Prestige 2013-2014 Audi A8 Quattro Base 2013-2014 Audi A8 Quattro L 2009-2010 Audi Q5 Premium 2009-2017 Audi Q5 Premium Plus 2009-2017 Audi Q5 Prestige 2010-2013 Audi S4 Base 2014-2016 Audi S4 Premium Plus 2014-2016 Audi S4 Prestige 2013,2017 Audi S5 Base 2010-2013 Audi S5 Cabriolet 2014-2016 Audi S5 Premium Plus 2014-2016 Audi S5 Prestige 2014-2017 Audi SQ5 Premium Plus 2014-2017 Audi SQ5 Prestige