March 6, 2011: 99 Toyota 4runner: I noticed my 4runner pitching on highway even at low speeds for several weeks. After I brought into Toyota they informed that the vehicle was extremely unsafe - rear end differential housing had become detached from frame on rear passenger side - right rear axle close to complete failure - Toyota stated it was too dangerous to drive. Severe rust on the structural and suspension components is excessive. Also large holes in differential housing causing fluid leakage. Toyota stated they could find used parts, including suspension bracket & entire replacement of differential housing & sway bar components - would cost up to $3000 to repair at my cost. Another option is to find a mechanic to weld & repair suspension brackets. The rear transfer case is so thin that oil is leaking through rust holes. Frame rails & entire undercarriage also severely rusted & deteriorated, including entire disintegration of the rear bumper with the front bumper having massive rust holes.

- Terrace , British Columbia, 00, USA

Several suspension and structural components of my 1999 4runner are showing excessive rust. The worst of which is on the rear axle and differential housing. I've recently had to weld a broken stabilizer bracket. The differential housing has rusted so bad that a hole has formed and gear oil is leaking.

- New London, NH, USA

Purchased new - now at 135K miles. Have replaced 1 or both rear axle seals at least 5 times -- first replacement was on my dime -- remainder have been under warranty. They replaced an axle last time, but in less than 2K miles symptoms returned (leaks on wheels, sticking rear brakes). Sure, it doesn't "cost" me anything, except my truck is in the shop 1-2 days each time!

- Folsom, CA, USA