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
2006-2008	Audi	A4	Base
2006-2008	Audi	A4 Quattro	Avant
2006-2008	Audi	A4 Quattro	Base
2007-2009	Audi	A4 Quattro	Cabriolet
2006-2009	Audi	A6	Base
2006-2011	Audi	A6 Quattro	Avant
2005-2011	Audi	A6 Quattro	Base