OEM 2007-2012 Nissan Altima 2.5L Federal Compliant Upstream O2 Sensor.

Installed before the catalytic converters on the catalytic converter pipes, these sensors often prove to be extremely difficult to remove without destroying the threads when installing an aftermarket set of catalytic converters.  This Sensor is also referred to as an "Air-Fuel Ratio Sensor" by Nissan.

NOTE: Nissan used different Upstream O2 Sensors between the production dates of 07/2010-08/2010. Vehicles in late 2010 & early 2011, if your sensor has a gray wire cover please select the 2008-2010 option, if your wire cover is blue please select the 2011-2012 option. If you have any questions or need us to confirm the correct sensor for your vehicle contact us via email and include your VIN.

Z1 recommends the usage of an anti-seize compound on the threads of the oxygen sensor to make future servicing much easier.

Fits:

• 2007-2012 Nissan Altima (QR25DE equipped)