The 2000 Subaru Legacy 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.
remove old pads and replace then with new ones
The 2006 Subaru Legacy has 51.0 in. of front hip room.
The 2001 Subaru Legacy has 38.9 in. of front head room.
The 2002 Subaru Legacy has 43.3 in. of front leg room.
The 2004 Subaru Legacy has 38.9 in. of front head room.
The 2007 Subaru Legacy has 44.1 in. of front leg room.
The 2005 Subaru Legacy has 39.5 in. of front head room.
The 2011 Subaru Legacy has 43.0 in. of front leg room.
The 2014 Subaru Legacy has 54.5 in. of front hip room.
The 2012 Subaru Legacy has 43.0 in. of front leg room.
The 2006 Subaru Legacy has 54.4 in. of front shoulder room.
The 2013 Subaru Legacy has 54.5 in. of front hip room.