Sept 9th, 2023 while driving on the interstate the vehicle lost all propulsion power, red lights shown in "gear, P N D" indicator area. I was in left lane and had to get to the side of the road, 4 lanes over, where putting the car in park and back in drive allowed for it to move forward again. I proceeded to a charging station to inspect the car and during this I hear a thump in the trunk area when going over bumps. Upon inspection under the car the rear access cover was hanging down but it was dark. The following morning a closer look revealed the rear subframe where the engine mounts had broken and a large piece of the frame was missing from the inside down. Mounting tab and hardware were still in place but pulled from the structure itself. The car was not handling correctly as if it had a low tire but tire pressure was correct. At drop off I noticed the rear camber seemed quite cambered. As a structural engineer I can see where the mounting tab weld to the aluminum frame failed. The frame appears to be cast and extruded tubing welded together and the failure is what would be considered a weak point at a weld. Car is currently at Tesla Norfolk Virginia for an evaluation and when I showed them the issue the staff did not want to document the issue and requested I perform a drive along with a tech. I asked why as the pics were evidence enough as to my complaint and issue. Cursory investigation online yielded this is not an isolated occurrence and with others having very serious failures I felt it important that perhaps it is severe enough for a modified part replacement. For reference no crash damage or any other like issues have occurred prior with the car.
NHTSA ODI 11549422