Overall, Tesla cars with Autopilot note roughly 6 times fewer accidents than the U.S. average.

The most recent Tesla safety report for the fourth quarter of 2019 turned out to be far behind Tesla's all-time record in Q3 2019.

The company registered one accident for every 3.07 million miles driven when Autopilot was engaged compared to 4.34 million miles just one quarter earlier. Also, the stats for driving without Autopilot were lower than before, which makes us wonder why? Maybe seasonality?

On the positive side, the average (with Autopilot) improved by 5.5% year-over-year, by 32.9% without Autopilot but with safety features and by 31.2% without Autopilot and without safety features.

All the results (as shown in the chart below), are significantly better than the general U.S. average, reported by NHTSA.

Tesla Safety Report – Q4 2019

"In the 4th quarter, we registered one accident for every 3.07 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 2.10 million miles driven. For those driving without Autopilot and without our active safety features, we registered one accident for every 1.64 million miles driven. By comparison, NHTSA’s most recent data shows that in the United States there is an automobile crash every 479,000 miles.*

*Note: Since we released our last quarterly safety report, NHTSA has released new data, which we’ve referenced in this quarter’s report."

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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, Model X and Model 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. Through over-the-air software updates, we’re able to introduce safety features and enhancements long after a car has been delivered, as well as release updated versions of existing safety features that take into account the most up-to-date real-world data collected by our fleet."