Tesla Cybercab under NHTSA probe as regulators audit how the steering-wheel-free robotaxi was self-certified under existing US safety standards.

NHTSA says it is in contact with Tesla and evaluating the Cybercab rollout, a day after the steering-wheel-free robotaxi began carrying passengers in Austin.

The investigation was launched just a few hours after Tesla put the first production Cybercabs on the road in Austin.