2013 TOYOTA FJ CRUISER Steering Problems

I purchased my beloved 2013 FJ Cruiser from Wellesley Toyota 6.5 years ago and have really enjoyed it. I have had it serviced religiously at McGee Toyota of Hanover since my purchase and expected to continue to enjoy it for many years to come and was just informed by McGee Toyota that the frame is severly rusted out throughout. My truck only has 158K miles on it and I expected this to last at least twice as long. This appears to be the same issue Toyota experienced with the Tundra and Tacoma with premature rusting on their vehicles due to a manufacturing issue. There are numerous complaints online about this issue and even a current class action lawsuit. I have alerted Toyota Corporate of this and they are not standing behind their product.

IN THE 60-70 MPH RANGE THE STEERING WHEEL SHIMMIED BACK AND FORTH AS MUCH AS 1-2 INCHES. THE VEHICLE FEELS UNSTABLE IN THIS RANGE. *TR

VEHICLE HAS A SHIMMY OR SHAKING AS FELT IN THE STEERING WHEEL AT SPEEDS OF 45 MPH OR HIGHER. THIS SEEMS MUCH MORE PRONOUNCED WHEN DRIVING ON A CURVE THAN ON A STRAIGHT HIGHWAY. HAVE HAD THE FRONT TIRES BALANCED BY THE TOYOTA DEALER 3 TIMES SO FAR, AND THE BALANCING IS SPOT ON (I WATCHED THEM BALANCE THEM), BUT SHAKING IN THE STEERING WHEEL STILL CONTINUES. THE TIRES DID NOT TAKE EXCESSIVE WEIGHTS EITHER. I HAVE STOCK TRD WHEELS WITH BF GOODRICH 265-75/16 TIRES - WHICH CAME WITH THE 2013 TEAM TRAILS EDITION. I DON'T BELIEVE THIS IS A TIRE BALANCING PROBLEM, BUT SOMETHING LOOSE IN THE STEERING OR SUSPENSION. *TR