First, get the correct replacement wiper blades. They will have instructions on them. The 2004 Toyota Sequoia has hook-end wiper arms. There will be a little tab or button where the wiper blade is inserted into the hook on the arm. Press and pull wiper blade out of hook. Sometimes you have to rotate and flex the blade a little bit in order to create clearance. See video below for hook-end arms.
http://www.ehow.com/how_4454148_replace-wiper-blades-toyota-corolla.html
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I do not see aftermarket replacement rear wiper blades nor rear wiper refills listed in the aftermarket wiper catalogs for the 2002 Toyota Sequoia. This would possibly indicate that the rear wiper was a proprietary technology/design and you may have to go to the dealer for the parts and possibly labor. Before doing this (because its usually a little more expensive going through the dealer), you may want to visit some internet forums and see if there's other ideas out there. Google "toyota sequoia forums" then search "rear wiper" once in the forums. I'm sure there's rapport on this topic. As far as front wiper blades, The 2002 Toyota Sequoia takes 19" replacement windshield wiper blades on both sides front and aftermarket wipers are available. Note, when buying wipers be sure to always lookup your vehicle make, model and year in the application guide book at the store, or now-a-days you can Google 'lookup wiper size'.
The 2008 Toyota Sequoia has the newer-style pinch tab wiper attachments. See sources and related links below for wiper blade installation videos and correct wiper blades. Basically pinch the tabs on both sides of the attachment and swing that side of the blade downwards out of the arm, then remove it from the tiny hook.
Change the wiper blades.
2004 Toyota Sequoia has a timing CHAIN, not belt, so I would assume that an '03 also has a chain.
Step 1 is to be sure you get the right replacement wiper blades. The 2000 Toyota Sienna takes 24" driver side, 18" passenger side replacement windshield wiper blades on the front and a 17" replacement rear wiper blade. Step 2: As far as installation, the replacement wiper blades will come with simple-to-follow, step-by-step, illustrated instructions.
it takes about an hour to do it. and it's easy.
There isn't one.