Where is fuel sensor on 01 elantra?

In a 2001 Hyundai Elantra, the fuel sensor is located within the fuel tank, typically as part of the fuel pump assembly. To access it, you usually need to remove the rear seat and the cover for the fuel pump access panel. The fuel gauge sending unit, which is the actual sensor, measures the level of fuel in the tank and sends this information to the fuel gauge on the dashboard.