According to the 2001 Ford Explorer Sport Owner Guide :
(17.5 U.S. gallons / 66.2 litres )
( 16.8 gallons ) in the 2003 Ford Explorer Sport
The gas tank on the 2001 Ford Explorer holds 21 gal..
I believe that is around 79.5 liters ( 21 U.S. gallons ) on the 2001 Ford Explorer four door
I believe the 2001 Ford Explorer 4 door gas tank capacity is ( 21 gallons )
The two door , 1999 Ford Explorer has a ( 17.3 U.S. gallon gas tank )
I believe it is 17.5 U.S. gallons ( 66.2 liters ) on a 2 door Explorer
All Sport Models hold 16.8 Gallons. All other Models hold 22.5 gallons.
The repair manual reads...7.8 to 13.2 qts.
DPFE sensor
That depends on what model year the 4 door Ford Explorer is : 1995 to 2001 models are / or around ( 21 U.S. gallons ) 2002 to 2010 models are , I believe ( 22.5 )
According to the 2013 Ford Explorer Owner Guide : ( 18.6 U.S. gallons )
( 21 ) U.S. gallons on the 2000 Ford Explorer four door