The EGR valve on a Nissan Frontier is on the drivers side of the engine. It is near the firewall, under the intake pipe.
how can I clean the Idle Air Control Valve on a 1998 Nissan Frontier
On a lot of these vehicles, the PVC valve is located on top of the valve cover, or a hose leading from the valve cover to the intake. You have to remove the right front wheel. It will be in the block. It is in an awkward place and Nissan charges about a 100.00 to install it. You can do it your self though.
The PCV valve on a 2000 Nissan Frontier 2.4 is on the top back part of the engine. It is attached to the intake manifold via a hose.
The 2003 Frontier 3.3L has an expansions valve, its part of the evaporator.
IACV-AAC Valve removal 2003 frontier
valve cover torque 98 nissan2.4
The PCV valve, on your Nissan 3.3 liter, is located on the side of the air filter housing. The valve should be labeled for easy identification.
the PCV on your 2003 Frontier S/C is on the passangers side Rocker cover(valve cover)
It is located inside the evaporator case.
What are the torque settings for Nissan ZD 3 liter turbo diesel cylinder head and valve clearances?
As of 2014, the cost for valve seal replacement on a 4-cylinder Nissan is around $350.00. If you do the repairs yourself, the cost can be cut in half.