It's down the side of the engine bay on the right side (looking at the front of the car). It's a bit of a pig to replace unless you can either work on the car from underneath or have arms like that bloke in the Fantastic Four, so best to get a garage to do it for you. It'll only take them half an hour. In any case, once you've located it, you'll see what needs to be done to change it ...
drop the tank.......
I have a 1985 celica GT and the fuel filter is located above the oil filter on the engine block. If the ST model has a 22re engine it should be the same.
in the gas tank
see this page, you can either follow this approach or purchase a new cabin filter (it's called AIR REFINER FILTER in Celica Repair Manual) and replace it http://spaldam.com/cars/rita/Interior/cabinfilter/
The fuel filter is located on the drivers side under but close to the air filter and the brake master cylinder.
its under the heating swicth
should be if your in front of the vehicle, to the left hand side on the firewall area low close to trans if i can recall like the corolla.
AnswerIt is inside of the fuel tank. Your fuel filter, fuel pump and fuel screen are one unit. They can be bought and replaced separately. So don't go out and buy the whole assembly. Yes...you can do it yourself. Not that complicated.
If it is an 89 st model with the 3sfe or 2.0l the fuel filter is located on the driver side just below the master cylinder.
The fuel filter for 2002 and all 7th Generation Celicas(2000 thru 2005) is located inside the fuel tank
Its located on the drivers side engine panel toward the bottom its very difficult to get to.
if you have the2.4l efi its under the intake bolted to the block