Ben 
2003 Toyota Sequoia SUV Limited 4WD 4dr SUV (4.7L 8cyl 4A)
Looks and runs great but it's a rust time bomb!
 I purchased this older vehicle to replace my money pit 96 Suburban and considered getting rid of my car as well. While replacing the exhaust I found that the frame was rotted out in the back behind where the tail pipe muffler was located.  This discouraged me greatly as I had heard these vehicles had this issue - but mostly the tundras were affected from what I've read even though it's the same frame.   On the outside you would never know and even looking underneath you wouldn't see it because the exhaust system is hiding it from plain view.  I contacted Toyota and they opened a case only to tell me that this vehicle was already serviced for this reason in February 2013 for the frame issue where they removed surface rust and treated it.  It appears that the frame is rusting from the inside I think that they didn't treat the passenger rear corner because of the exhaust would be in the way.  I thought I had purchased a dependable vehicle only to find out that it's a pile of scrap now.  It still drives great but I purchased it to tow which I will not do now - I hope to get rid of it before this rust time bomb explodes.