21 gallons ( U.S. ) for the 4 door Explorer
According to the 2006 Ford Explorer Owner Guide : ( the gas tank capacity is 22.5 U.S. gallons )
The gas tank on the 2008 Ford Explorer holds 22.5 gal..
The gas tank on the 2005 Ford Explorer holds 22.5 gal..
The gas tank on the 2001 Ford Explorer holds 21 gal..
The gas tank on the 2012 Ford Explorer holds 18.6 gal..
The gas tank on the 2003 Ford Explorer holds 22.5 gal..
The gas tank on the 2014 Ford Explorer holds 18.6 gal..
The gas tank on the 2002 Ford Explorer holds 22.5 gal..
The gas tank on the 2004 Ford Explorer holds 22.5 gal..
The gas tank on the 2010 Ford Explorer holds 22.5 gal..
The gas tank on the 2009 Ford Explorer holds 22.5 gal..
The gas tank on the 2007 Ford Explorer holds 22.5 gal..