The contact owned a 2022 Honda Accord. The contact stated that while driving 68-70 MPH, the vehicle stopped abruptly, causing another vehicle to crash into the rear passenger’s side of the vehicle, and a second vehicle to crash into the rear of the vehicle, causing the trunk to be pushed inside the rear seats of the vehicle. The brake warning light was illuminated. The air bags of the contact’s vehicle did not deploy. The air bags of the two other vehicles deployed. The contact stated that the rearview mirror separated and hit her head, causing a concussion. Additionally, the contact sustained whiplash, PSTD, and contusions on the back and on both ankles. The contact received medical assistance. The front passenger seat occupant of the second vehicle that rear-ended the vehicle sustained hip injuries, as the occupant was still recovering from a hip surgery that she had undergone prior to the collision. It was unknown whether the passenger received medical assistance. There was no property damage. A police report was filed. The vehicle was towed to Crash Champions, where it was totaled. The contact hired private investigators who retrieved the EDR data and informed the contact that the emergency braking system had engaged prior to the crash; however, the contact stated that there was no other vehicle or object around the vehicle at the time the emergency braking system had engaged. The vehicle was towed to the dealer, where the contact was informed that special equipment was not available to diagnose the vehicle based on the EDR data. The manufacturer was not notified of the failure. The failure mileage was approximately 37,600.