Frame Rust problems of the 2003 Mazda Tribute

The contact owns a 2003 Mazda Tribute. While pulling out of a parking space, a screeching noise started. An independent mechanic diagnosed that the vehicle was unable to be driven due to severe rust in the subframe and suspension components. The manufacturer was not notified of the failure. The vehicle was not repaired. The VIN was invalid. The approximate failure mileage was 143,000.

My 2003 Mazda Tribute subframe snapped after 9-10 years of owning the vehicle. When that happened my wife immediately pulled into a merlin and they informed her we cannot drive the vehicle out of there or it would break all the way through. We were informed we have until the end of the upcoming Monday to have it towed out of there. We had it towed and were given $220 dollars for the Tribute. The subframe completely snapped all the way through while the tow truck employee turned the wheel. I'm concerned because my wife was driving my Tribute with my son in the car. It seems dangerous having the subframe would rust and break within a timeframe that someone would typically own a vehicle. Especially with my wife and son in the vehicle. Is this a freak of nature incident or is this something that would be considered manufacturer error.