The fact that Dodge sealed the lower drain holes with a sealing tape and a tendency for water to leak in around the door handle causes heavy rusting. If not too late you can remove the seal tape around the bottom of the door to allow any water to drain out. Spraying the inside of the door once a month will go a long way to preventing rust out.
The 2013 Dodge Durango has a 5 yr./ 100000 mi. warranty against rust.
The 2002 Dodge Durango has a 5 yr./ 100000 mi. warranty against rust.
The 2001 Dodge Durango has a 5 yr./ 100000 mi. warranty against rust.
The 2005 Dodge Durango has a 5 yr./ 100000 mi. warranty against rust.
The 2011 Dodge Durango has a 5 yr./ 100000 mi. warranty against rust.
The 2003 Dodge Durango has a 5 yr./ 100000 mi. warranty against rust.
The 2007 Dodge Durango has a 5 yr./ 100000 mi. warranty against rust.
The 2004 Dodge Durango has a 5 yr./ 100000 mi. warranty against rust.
The 2012 Dodge Durango has a 5 yr./ 100000 mi. warranty against rust.
The 2008 Dodge Durango has a 5 yr./ 100000 mi. warranty against rust.
The 2009 Dodge Durango has a 5 yr./ 100000 mi. warranty against rust.
The 2009 Dodge Charger has a 5 yr./ 100000 mi. warranty against rust.