As was said, those frames were worse than the 4runner frames. There have been other posts from a long time ago detailing the difference in the process for the taco/Tundra/sequoia frames form the 4runner frames, and thus why the 4runners weren't recalled. I can't verify that those details are correct, but it didn't sound made up at least.
And I am not trying to criticize you for posting, I'd love it if you are correct. I was just stating my worthless, non-contributing opinion; or in other words, internet-ing.
I don't know about Ohio, but here in NE, you see very few vehicles over 10-15 years old, because they all rust out. When I go home to Colorado, I notice a huge number of older cars still on the road. My point is just that I don't think that the 4runners are so incredibly different in their rust prevention (on the frame) than other cars that it warrants a recall. Especially now after the last one was produced 13 years ago. Failure after 13 years, even on a vehicle isn't a recall-worthy failure rate (and that is coming from my experience as an automotive engineer).
Honestly, if there was a recall on the 4runner, in my mind it would be the LBJ's, and the solution would be to redesign and replace the entire knuckle/LBJ/LCA assembly the way they did for the 4th gen. That is a real safety issue, and I think approaches recall level of danger. IIRC they did issue a sort of recall on them, but I think they just replaced the part with a new LBJ that had a better alloy that could withstand the stress better, which is why OEM is so much better on the LBJ's. I haven't seen the catastrophic failures of a frame that we have seen on the LBJ's, so the risk just isn't as severe. That's just my opinion though.
