Instructions:

-To remove the PCV valve, just pull it out of the valve cover and pull off the hose.
-To test the PCV valve, start the engine, pull the valve out of the valve cover and put your thumb over the hole in the end.
If you hear a little click, then the PCV valve is good. If there is no vacuum at the hole, either the valve is bad or the hose is bad.
-To see if the hose is bad, pull the hose off and put your thumb over the end. If there is vacuum, replace the PCV valve. If not, replace the hose.

Technology:

Although the PCV valve is a simple device, it is designed to reduce the air pressure inside the engine and redirect it to the air intake system.
Since the air is contaminated with oil, gasoline and engine metal residue, this in time will affect the operation of the valve assembly.
The valve can plug up over time, which will result in a poor running engine that delivers less power and reduced fuel economy.
It is a simple and inexpensive repair that will help contribute to a fuel-efficient and smooth running engine.

Common symptoms of a faulty PCV Valve include:

-Oil leaks / Oil in the Air Filter housing
-Excessive Oil consumption
-Gray-white smoke from the tailpipe
-Check Engine Light illuminated (common codes include P0171 and P0174)

Compatible with Nissan 3.5L V6 PCV Valve :
2003-2009 350Z
2002-2006 Altima
2002-2008 Maxima
2003-2007 Murano
2002-2004 Pathfinder
2004-2009 Quest

Compatible with Infiniti 3.5L V6 PCV Valve :
2008-2012 EX35
2003-2012 FX35
2003-2008 G35
2002-2004 i35
2006-2010 M35
2012-2013 M35h
2014-2018 Q50
2014-2018 Q70
2002-2003 QX4

Replaces Part #: 045-0347, 0450347, 118108J101, 118108J102 PCV Valve.

NOTE: This is NOT a genuine part, it's a aftermarket replacement part manufactured by GBDAMI.