2021 Toyota Redundant Sienna seats problems

I was in a major traffic accident on 2/14/22. I was rear ended in traffic by a car going high speeds. The headrest on the driver seat popped off and ended up in the second row on the floor. Because the headrest came off during the accident my head and neck were not supported and I am still recovering at this time. Although I'm thankful to have survived this is likely a safety issue. I do have a picture and a police report if needed.

The contact owns a 2021 Toyota Sienna. The contact stated that while driving at various speeds, the third-row seat would slide up whenever the vehicle went over a bump. The third-row seat latches were not installed properly to secure the seat to the base. The contact was concerned that the seat could injure his pet dog when it was in the seat. The vehicle was taken to the dealer, but the dealer could not duplicate the failure. The vehicle was not repaired.