Interesting highlight from our 04 -- if you take the back seat out (bottom and back cushion), on each side, you'll see a piece of tape over a roughly 1/2 - 5/8" dia. hole on the upright (? C-pillar?).The dogleg (the area between the rear door and the rear wheelwell) is well known for rusting and perforation.
I've seen it on at least 1/4 of all gen 4 models. [/b]