Where is the fuel filter located on 2002 Volkswagen Jetta

How can you check to see if fuel filter is bad

Asked by for the 2002 Volkswagen Jetta
Do a pressure test from each side of the filter . Flow check can be done the same. Have proper factory specs to compare to.
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the only way to check a fuel filter is to take it off and blow through it if its hard to blow through then it needs replaced Im not quite sure where the filter is but check the firewall under the hood