NHTSA Complaint #11708449 — 2014 INFINITI QX80

My daughter was driving this car home from college on I80 east from Iowa to joliet and almost was involved in a accident. The stearing started to lean to the left and when she had to slow down and brake the stearing went hard to her left until she released the brake. she pulled over and called me i came out and drove it home slowly. i took it to my mechanic which i thought it was an alignment issue or a caliper on rear brakes. However it was brought to my attention by the mechanic that the left side of the rear sub frame was rootted out by rust and broke almost causing a major accident. I have been to the Infinity of Naperville three times this year and muliple times over the course of 2yrs for maintence and the rear sub frame passed the inspection everytime! This should be a saftey concern for all of these Infinity QX80 vehicles in illinois that are exposed to salt with this kind of metal for a frame. This product that Infinity manufactured completly broke while driving after being inspected and passed just 3 months ago. I am also conserned about my main frame also. The 1st pic I have icluded is my rotted out sub frame and the 2nd 3rd pic is the rotting main frame!