Where is fuel filter on 1998 Volvo S70 non turbo?

The fuel filter is located underneath the rear passenger seat next to the canister box (the canister looks more like an air filter box housing. All you need is an 1/2 inch key to loosen one screw and pull on one end of the hose/tube to release it from the fuel filter. Pull opposite the unit. your best solution is to look to buy it on line so you have an idea as to what you are looking for then check against the info provided to you. I just did mine 15 mins. next to the rear tire. You will need to jack up the rear tire for easy access

The fuel filter can be located under the carpeted cargo storage floor at the rear of the wagon. Remove the four 10mm bolts, remove the cover. You will then see a removable plate to the right just behind the rear passenger seat. Fuel filter can be seen through hole in hole. Replaced from underneath wagon. Be sure to make sure lines are fully inserted onto filter. Check for leaks. Note arrow on filter for correct fuel flow. Good luck and hope this helps and no smoking please LOL