2014 Toyota Rav4 Seats Problems

I have been experiencing a strange burning smell in my RAV4 for the past week but was unable to locate the source. No warning lights were active on the dash and the vehicle was functioning properly. Because I live in a colder climate I generally use the heated seat function daily, but would like to clarify that the use of my vehicle amounts to less than an hour a day with my combined morning and afternoon commute. Today I noted that there is a sizeable hole in my driver seat that is burned and melted from the heated seat function. I have not turned the heated seat function back on for fear of a fire.

TL* THE CONTACT CALLED ON BEHALF OF HER HUSBAND WHO OWNS A 2014 TOYOTA RAV4. THE CONTACT STATED WHILE HER HUSBAND WAS AT A STOP LIGHT, A VEHICLE APPROACHING BEHIND REAR ENDED THE VEHICLE. DUE TO THE IMPACT, THE VEHICLE JOLTED FORWARD AND CRASHED INTO THE VEHICLE IN FRONT AND ANOTHER VEHICLE WHICH WAS TO THE LEFT. THE FRONT DRIVER SEAT COLLAPSED AND WAS DEFORMED DURING THE IMPACT. IN ADDITION, THE HEAD REST COMPLETELY DETACHED FROM THE FRONT DRIVERS SEAT. THE CONTACT WAS ASKED ABOUT THE AIR BAG DEPLOYMENT AND CONFIRMED THAT NO AIR BAGS DEPLOYED DURING THE IMPACT. THE DRIVER SUSTAINED CHEST INJURIES AND WAS TAKEN TO THE HOSPITAL FOR MEDICAL ATTENTION. A PASSENGER SITTING IN AN UNKNOWN LOCATION OF THE VEHICLE WAS ALSO INJURED AND SOUGHT MEDICAL ATTENTION. THE VEHICLE WAS TOWED TO A IMPOUND LOT AND THEN TOWED BY THE INSURANCE COMPANY WHERE AN ADJUSTER WAS TO INSPECT THE VEHICLE. A POLICE REPORT WAS FILED. A LOCAL DEALER AND MANUFACTURER WERE NOT NOTIFIED OF THE FAILURE. THE FAILURE MILEAGE WAS 17,000.