NHTSA Complaint #11468802 — 2018 TESLA MODEL S

--- System: Autopilot, emergency braking, collision detection. Vehicle IS available for inspection if requested. --- How safety was put at risk: In 2018, while driving on the interstate at about 70-80 mph with Autopilot enabled the car suddenly braked for no reason. By our estimates the car's velocity changed by about -20 mph in a very short time. There was no debris in the road, obstruction or reason for the car to do this. If there had been a car behind us it would have resulted in an accident. --- Has problem been confirmed by service center: Yes --- Has vehicle been inspected by manufacturer: Yes --- When we contacted Tesla they initially denied anything happened but when we took it to another service center a different engineer confirmed that something happened but would not provide the logs. After 6 months of fighting with them trying to get more information we gave up and had to stop using Autopilot due to safety concerns. --- Were there any warnings: No. It was abrupt and frightening. --- Additional: I have email correspondences with the service center and invoices if requested. However due to their extensive nature I'd rather speak to someone at the NHTSA before gathering the documents.