Rust on everything under the truck as well as the rear bumper. Parts that have had to be replaced because of rust and/or rust perforation or need to be replaced: 1) entire frame ' perforation greater than 10mm found on passenger siderail 2) rear differential (leaking from rust perforation) 3) brake lines 4) power steering line (leaking from rust) 5) skid plate (support brackets rusted - fell off while driving) 6) brake calipers (multiple times) 7) coil springs 8) axles (front and back) 9) control arms 10) cv- joint 11) boots 12) hitch receiver 13) exhaust 14) muffler 15) camber bolt 16) multiple sets of tires (unable to align tires properly due to rusted/seized camber bolt) causing premature tread wear. 17) brake drums (warped and pitted) 18) wheel bearing 19) truck tailgate support wires ' wires rusted and broke. Tailgate won't open/close without extreme effort because it is not aligned properly. 20) shocks/struts 21) seals, brackets, nuts and bolts - the parts listed above is not complete. Basically, everything you see under the truck is suffering from extreme rust and/or perforated. *truck has had a horrible shimmy for years that no one has been able to figure out, particularly bad when towing. Steering wheel shakes violently as well as the entire truck. Improved slightly when rear differential and axles were replaced. Most likely related to frame warp or instability. *truck has had issues with getting in and out of 4WD. Inconsistent with how long it takes to get in and out of 4WD. There is a loud and jarring clunk when engaging or disengaging 4WD. *truck feels like it is on the verge of going out of control when a hole or bump is hit. The truck will literally jump sideways. *traction stability control comes on randomly when hitting a bump or hole. Another mystery to mechanic.

- Chagrin Falls, OH, USA

Rust all over the undertruck, even the catalytic converter is rusted. I was part of that recall and the dealer is going to spray the frame to stop the corrosion. Can the corrosion process ends with the spraying?

- Williston, VT, USA

Brought vehicle in for new muffler and tailpipe. Mechanic showed me a leaky rear seal because the metal cover was rusting through. Also showed me main frame and suspension points which are, in his words, "like rust holding hands".

- Montgomery, NY, USA

I had the check engine lite checked at the Toyota dealer. The Tundra required a complete exhaust system including catalytic converters at a cost of $4000. The dealer found that the frame was rusted through and notified Toyota. Toyota will pay to replace the frame. However the 2004 model year is not part of a recall.

- Wakefield, RI, USA

Excessive rust throughout underbody and drive train components. Porous, rusted through differential now leaking oil. Rust issues started while vehicle still under 3/36 warranty. Belt tensioner bracket, bracket mount and ball joints at 33,921 miles, sway bar linkages rusted through at 45,168 miles. Both issued repaired as warranty matters. Toyota claims current problem not covered but admits defective material and offers to provide replacement parts only, requiring estimated $770 to complete the repair. Have initiated complaint with Toyota, file number available upon request.

- Brewster, MA, USA