On average, the company registered one accident for every 4.34 million miles driven when Autopilot was engaged. That's almost 10-times better than the U.S. average.
Even those without using Autopilot or other safety features, Tesla was way above the industry average (see our chart below).
Tesla Safety Report – Q3 2019
"In the 3rd quarter, we registered one accident for every 4.34 million miles driven in which drivers had Autopilot engaged. For those driving without Autopilot but with our active safety features, we registered one accident for every 2.70 million miles driven. For those driving without Autopilot and without our active safety features, we registered one accident for every 1.82 million miles driven. By comparison, NHTSA’s most recent data shows that in the United States there is an automobile crash every 498,000 miles."
General info from Tesla:
"At Tesla, we believe that technology can help improve safety. That’s why Tesla vehicles are engineered to be the safest cars in the world. We believe the unique combination of passive safety, active safety, and automated driver assistance is crucial for keeping not just Tesla drivers and passengers safe, but all drivers on the road. It’s this notion that grounds every decision we make – from the design of our cars, to the software we introduce, to the features we offer every Tesla owner.
Model S, X and 3 have achieved the lowest probability of injury of any vehicle ever tested by the U.S. government’s New Car Assessment Program. Much of this has to do with the rigid, fortified structure of the battery pack that is mounted to a car’s floor, which provides a vehicle with exceptional strength, large crumple zones, and a uniquely low center of gravity. Because of their strength, Tesla’s battery packs rarely incur serious damage in accidents. And, in the extremely unlikely event that a fire occurs, the state-of-the-art design of our battery packs ensures that its safety system works as intended and isolates a fire to select areas within the battery while simultaneously venting heat away from the passenger cabin and the vehicle.
While no car can prevent all accidents, we work every day to try to make them much less likely to occur. Active safety features come standard on all Tesla vehicles made after September 2014 for an added layer of safety beyond the physical structure of each car. Because every Tesla is connected, we’re able to use the billions of miles of real-world data from our global fleet – of which more than 1 billion have been driven with Autopilot engaged – to understand the different ways accidents happen. We then develop features that can help Tesla drivers mitigate or avoid accidents. And through over-the-air software updates, we’re able to introduce safety features and enhancements long after a car has been delivered."