Well I have a Saab 900. If you are referring to what side the tank is on, its the passenger side which took me a long long time to get used to. Saab always has to do something unique(and usually impractical) but if that's not what your talking about, on my 900 it is on the passenger side just in front of the rear axle.
The fuel filter on a 1996 Saab 9000 is located under the car, just in front of the right rear wheel. Replacement is easy, but take care and precautions (fire extinguisher) because there's riks of fuel spill.
The fuel pump relay is behind the fuse box on the passenger side in the glove box.
It doesn't have a carburetor, it is fuel injected.
Remove the gasoline from the gasoline tank. Remove the fuel line from the gasoline tank. Remove the fuel sending unit retaining plate. Reverse the process to install the new fuel sending unit.
The fuel filter on a Saab 9-5 is located above the gas tank in the rear of the vehicle. The fuel filter has a line leading to the EFI (Electronic Fuel Injector) in the engine, a vapor line for the gas tank, and a fuel line from the gas tank.
THERE SHOULD BE AN ACESS HOLE IN THE TRUNK TO GET TO THE FUEL PUMP THAT IS LOCATED IN THE TRUNK.REMOVE FUEL PUMP AND REPLACE WITH NEW PUMP.
The 2003 9-3 doesn't have a replaceable filter, I doubt the 9-5 does either.
If it has one it will be located directly above the center of the fuel tank. It may very well not have one, which in that case you will have to remove the fuel tank to replace the pump.
I have this same year of saab, jack it up and look under the car about midway from the engine twords the middle you will see it. connected by two pipes going either direction.
The SAAB will have an oil sump, specifically the oil pan collection for the engine oil and the fuel sump, the collection area for the fuel pump to pull from.
in the rear on the left side
check this site out .http://www.thesaabsite.com/Saab%20900-93%20fuel%20pump%20replacement.html