I believe it is on the left hand side of the engine, on the firewall side. It is soewhat difficult to get to. You need small hands and patience. This is alwo where the thermostat is located (3 bolts). I believe there is an answer on this site for the thermostat and the sensor is adjacent to it. I considered changing the thermostat, but since it's somehwat complicated, I will leave it to a garage to do it for me.
where is the fuel filter located would like to see a picture , 1990 Nissan Sentra sedan
Probably the engine end of the upper radiator hose
how to change a thermostat on a 1990 Nissan pintara
It should be right on the valve cover somewhere.
The fuel pump is located in the fuel tank, and can be accessed by removing the rear seat.
How do you adjust timing chain on a 1990 sentra?
should eather be at the top in to engine or on bottom hose coming from engine
Usually in a removable housing at the engine end of the upper radiator hose
3.9Liters with filter change
Look in a removable housing at the engine end of the upper radiator hose
directly underneath the washer fluid.
Change the fuel filter.