Run a compression check on all cylinders. If that cylinder has low compression you have a burned valve or bad head gasket.
fuel filter is in the gas tank and not recommended to be changed.
fuel pump is in the gas tank and the filter is to the left of the master cylinder on the firewall
The 1995 Nissan Altima was equipped with the 2.4L 4-cylinder. Oil filter part numbers by manufacturer are Ford Motorcraft FL389, Denso 1501007, and AC Delco UPF1232.
Its located in the fuel tank. It is not a serviceable part
You need to change the filter with every oil change. Nissan recommends every 3750 miles.
Does this oil filter fit a 2008 Nissan Altima 2.5L
No
Have you checked the fluid level? Have you changed the filter and fluid as normal maintenance?
Yes.
A 2006 Nissan Altima has a fuel filter located along the vehicle's frame. It is positioned just past the fuel tank for maximum efficiency.
Nissan altima 2015
It would be nice to know the year of your Nissan Altima. For Nissan 2000 Altima GXE the air filter is located right next to the battery. Just push off the 4 clips that hold the top of the filter housing and pull the top off just enough to remove/replace the air filter. Close it and and pull the clips back on.