Three problems related to sway bar have been reported for the 1998 Toyota 4Runner. The most recently reported issues are listed below.
Rear passenger side sway bar attachment rusted through and snapped from frame. And on other side sway bar link snapped. In addition the frame near it is rotting away. Noticed it while driving it was swaying badly. In addition the driver side seat belt will unlatch occasionally while driving.
I was driving on the interstate at 65 mph and I went over an overpass with a bump at the beginning of it, I heard a clunk then my car started swaying back and forth very badly,I managed to pull over on the emergency pull off, I thought a wheel had come loose,I found no loose wheel so I started looking underneath and wow!!!!!. . The torsion bars had both rusted off the frame and both sway bars were broke off,the only thing holding the back axal on was the back of the torsion bars,,,needles to say my favorite car is out for the count.
Vehicle started a clunking sound and began to sway from side to side. Mechanic inspected and found frame had rusted on drivers side near rear sway bar.