NHTSA Complaint #11665990 — 2017 TESLA MODEL S

While merging onto the highway an error message showed up on the dash stating "Steering Assist May be Reduced" upon immediately after the steering froze and could only be moved slightly using significant force. Approx. 75lbs. I am athletic and work out and had trouble moving the car to the side. If my wife or daughter had driven the car they would not have been able to steer and this could have caused a significant accident, injury or death. Upon pulling over, I rebooted both computers on the Tesla Model S 75 D and the problem went away. I immediately drove to the Tesla dealer in Chesterfield, MO. There they seemed unconcerned, and advised me it was likely just a firmware issue and wouldn't be able to look at the car until the next week. I was shocked. Since the systems seemed to work I drove home and parked the car. On the driveway, the same error showed up and steering seemed again to lock up. After rebooting problem went away. Looking at the Tesla forums this seems to have happened before and poses a serious danger to the driver, occupants and fellow drivers on the road. I no longer feel safe driving the car.