DETROIT, Mich. –
Three times in the past four months, William Stein, a technology analyst at Truist Securities, has taken Elon Musk up on his invitation to try the latest versions of Tesla’s vaunted “Full Self-Driving” system.
A Tesla equipped with the technology, the company says, can travel from point to point with little human intervention. Yet each time Stein drove one of the cars, he said, the vehicle made unsafe or illegal maneuvers. His most recent test-drive earlier this month, Stein said, left his 16-year-old son, who accompanied him, “terrified.”
Stein’s experiences, along with a Seattle-area Tesla crash involving Full Self-Driving that killed a motorcyclist in April, have drawn the attention of federal regulators. They have already been investigating Tesla’s automated driving systems for more than two years because of dozens of crashes that raised safety concerns.
The problems have led people who monitor autonomous vehicles to become more skeptical that Tesla’s …