You have to remove the door panels. You can use 6.5" speakers with a little bit of adaptation. You can search for door panel removal. There are 4 screws, a couple of clips and clips around the edge of the door panel.
The 2012 Toyota Sequoia has 38.3 in. of front head room.
The 2004 Toyota Sequoia has 41.1 in. of front head room.
The 2014 Toyota Sequoia has 42.5 in. of front leg room.
The 2006 Toyota Sequoia has 59.7 in. of front hip room.
The 2005 Toyota Sequoia has 41.6 in. of front leg room.
The 2010 Toyota Sequoia has 66.4 in. of front shoulder room.
The 2003 Toyota Sequoia has 59.7 in. of front hip room.
The 2014 Toyota Sequoia has 66.4 in. of front shoulder room.
The 2005 Toyota Sequoia has 41.1 in. of front head room.
The 2001 Toyota Sequoia has 59.7 in. of front hip room.
The 2005 Toyota Sequoia has 62.1 in. of front shoulder room.
The 2002 Toyota Sequoia has 62.1 in. of front shoulder room.