I had my '03 SE in the shop this week for the fuel damper recall, and had them check out my seat. Been just living with the rattle for the last 6 months, waiting for a reason to take it to the dealership.
So, they ordered the seat frame. Just got a card in the mail yesterday saying it's in, so I'll be making an appointment soon to get it replaced. Although, after reading the whole thread, I now have no faith that this will fix it.
Now, I do think Toyota makes EXCELLENT cars. Compared to other manufacturers, you just can't beat the reliability. However, when there are problems such as these, it seems like it takes them forever to address it.
My '99 Highlander Edition was an awesome truck. The ONLY problem I had, was with the clutch pedal assembly. Within 6 months of buying it, it squeeked. It actually sounded like the whole thing had rusted out, and was about to fall apart. Took it in the first time, and they said they'd been having problems with these, and once they replaced it, the problem went away. Great.
They ordered one, replaced it a few days later, and 6 months later, it was back. This time, they just greased it. One month later, it was back.
I kept arguing with them, that THEY told me this was a common problem (they now denied that, and tried telling me it was normal). The pedal was so loud, that I could hear it on the highway, with the windows down, and the radio on.
They finally replaced it a second time, after MUCH fighting. 6 months later, it was back. Again, they fought me on it. Finally ordered a new master and slave cylinder. Picked it up after those were installed, to find out there was NO difference. "Oops!" The tech only installed the master cylnder, and not the slave cylinder. God forbid they actually check their work.
After that, I gave up, and just lived with it.