The 2004 Toyota Sienna has the most common hook-end wiper arms. See sources and related links below for installation videos. Also, purchase the replacement blades first and there will be additional instructions/illustrations on the replacement packages. Locate and press the tab or button where the wiper blade is inserted into the hook of the wiper arm and pull wiper blade out of hook. You may have to rotate and flex the blade to make enough clearance for the hook to pass through.
The 2011 Toyota Sienna has 65.0 in. of front shoulder room.
The 2006 Toyota Sienna has 63.8 in. of front shoulder room.
The 2009 Toyota Sienna has 58.4 in. of front hip room.
The 2005 Toyota Sienna has 42 in. of front head room.
The 2004 Toyota Sienna has 63.8 in. of front shoulder room.
The 2010 Toyota Sienna has 42.0 in. of front head room.
The 2003 Toyota Sienna has 58.7 in. of front hip room.
The 2014 Toyota Sienna has 58.6 in. of front hip room.
The 2006 Toyota Sienna has 42 in. of front head room.
The 2014 Toyota Sienna has 41.0 in. of front head room.
The 2009 Toyota Sienna has 63.8 in. of front shoulder room.
The 2013 Toyota Sienna has 65.0 in. of front shoulder room.