NHTSA’s Autopilot Claim That Tesla Touted Disputed in New Study

An analysis of government data disputes a finding by safety regulators and promoted by Tesla Inc. that crash rates of its older vehicles declined after they were equipped with an automatic steering capability.

The study, released Friday by Quality Control Systems Corp., a data analysis company in Maryland, examined the National Highway Traffic Safety Administration’s 2017 conclusion that there was a 40 percent reduction in the rate of crashes by Tesla vehicles that resulted in the deployment of air bags after they were equipped with Autosteer, a part of the automaker’s suite of automated driver-assist systems it markets as Autopilot.