NHTSA Complaint #11559589 — 2023 RIVIAN R1S

Low Tire Warning either failed or is defective. On Dec 11, 2023 my rear tire went flat (to 4 PSI) while driving on the freeway. I was driving for about 25 miles on the freeway when the Rivian R1S truck kept swerving left and right between the lane markers like the lane assist was malfunctioning. Another driver pulled up on the side of me and got my attention by honking their horn to let me know my tire was flat. At this point the rear passenger tire was dangerously low. There was no warning message on the dash that my tire was dangerously low. This could have resulted in a serious accident simply because I was not given proper warning about the tire pressure. I believe that the tire is defective, so had the truck towed to a tire shop to inspect and replace the tire. The truck is about 30 days old with 1,801 miles on it.