Renault say about 120,000 miles, If it's are not in front of the tank it is built into the sender unit, you may just have to buy the lot, if you are having trouble at all.
Check with your local parts dealer.
Edit, just found this link to confirm...but is an '02 model.
http://www.howtomendit.com/answers.php?iHow to change fuel filter on a renault clio?
The fuel filter is built into the fuel pump which is submerged in the fuel tank. It will not require replacement unless the fuel pump goes wrong.