try going to auto zone's website and looking under the "Vehicle Repair Guides" for your vehicle. I was able to find easy to read diagrams showing me where things were and how to replace them. Its kinda like an online Haynes manual!
The fuel sensor on a Hyundai Santa Fe is located in the fuel tank. The fuel tank will need to be removed. The fuel sensor is attached to the fuel line. Remove the fuel line. The sensor can then be removed. Reverse the process to install the new sensor.
The 2004 Hyundai Santa-FE runs on regular unleaded.
Check
A code, PO170, fuel trim malfunction Bank 1 on a 2001 Hyundai Santa Fe means that an oxygen sensor is bad. This oxygen sensor is located on the driver's side of the transmission.
In the fuel tank
The 2006 Hyundai Santa-FE runs on regular unleaded.
The 2009 Hyundai Santa-FE runs on regular unleaded.
The 2008 Hyundai Santa-FE runs on regular unleaded.
The 2014 Hyundai Santa-FE runs on regular unleaded.
The 2005 Hyundai Santa-FE runs on regular unleaded.
The 2002 Hyundai Santa-FE runs on regular unleaded.
The 2011 Hyundai Santa-FE runs on regular unleaded.