NHTSA Complaint #11457417 — 2017 TESLA MODEL X

At 1:10 pm on Wednesday, November 10, 2021 we were travelling SB on I-5 near Longview, WA. The day was clear and dry. We were in Lane 2 of a 3-lane stretch of interstate. There were no vehicles in either lane right next to us; a semi-truck was in Lane 1 (outside lane) several car lengths in front of us; a passenger car was 1-2 car lengths behind us in the same lane as us (Lane 2). No overpasses, trees, or any other discernable distractions were present. We were travelling at 70 mph on cruise control. With no warning, the car braked suddenly in an effort to bring the car to a full stop. Fortunately, the driver directly behind us was paying attention and was able to swerve into Lane 3 to avoid rear-ending us. I was able to bring my car into the Tesla location in Lynnwood, WA for service on November 12, 2021 to have the issue checked. While in for service, I did some research on the issue and found blogs dating to 2018 about "phantom braking"; I determined this described our situation. When I collected the car, the service tech said they were unable to replicate the issue and therefore, were not able to establish a problem to correct. I inquired if they knew about a phantom braking issue; they indicated that Telsa had heard of it and was working on a "fix" but there was no known timeline for the "fix". I have not used the cruise control feature in my car since 11/10/21 and will not because of the significant safety concern. Tesla need to be MADE to make this safety issue a priority to correct. If Musk's team can build a rocket and send it to space, they certainly can correct a cruise control issue.