I just replaced one 4.7 liter. If you are facing the engine from the front it is located on the left side (passenger side) under the forward cylinder. I found if you turn your tires out to the right it makes it more accessible. I hope this helps
The 2003 Dodge Durango has single overhead cam (SOHC).
It is under the front of the right head.
Underneath the front outside corner of the passenger side cylinder head.
The 2001 Dodge Durango has single overhead cam (SOHC).
The 2007 Dodge Durango has single overhead cam (SOHC).
The 2011 Dodge Durango has double overhead cam (DOHC).
The 2009 Dodge Durango has single overhead cam (SOHC).
The 2004 Dodge Durango has single overhead cam (SOHC).
The 2012 Dodge Durango has double overhead cam (DOHC).
The 2013 Dodge Durango has double overhead cam (DOHC).
The 2006 Dodge Durango has single overhead cam (SOHC).
The 2008 Dodge Durango has single overhead cam (SOHC).