The information I found says the fuel filter is in the tank on the Santa Fe. The Sonata has one inline however
Here's some repair information if you're curious
hope this helps!
I just purchased a 2009 Hyundai Sante Fe and it was missing the owners manual to the car. I clicked on the above link and it said that it could not be found! Please send me the correct link, I would appreciate it! your Illinois lemon law claim for both lemon automobiles and consumers products @ http://www.illinoislemonlaw.com/