The transportation agency is reviewing the new robotaxi’s design and compliance with safety standards.

The National Highway Traffic Safety Administration opened an investigation into Elon Musk's Cybercab one day after its launch in Austin, Texas.

The NHTSA's investigation will now look into whether Tesla deemed that certain parts of its self-certification process were 'are inapplicable to the Cybercab.'

Shares of Tesla ( TSLA) were down nearly 7% in recent trading, making it one of the leading decliners in the S&P 500 and Nasdaq on a down day for broader markets. The move erased much of the stock’s gains earlier in the week.

Tesla is facing a NHTSA audit inquiry into its self-certification for the Cybercab hours after deploying a small number of the robotaxis in Austin.

US regulators has launched an investigation into Tesla's certification of its new Cybercab robotaxi. Can they slow down its expansion?

Tesla launched the all-electric, steering wheel-less, and pedal-less Cybercab last night at a quiet and small event in downtown Austin, Texas. The launch, which marked the beginning of unsupervised ride-hailing for Tesla’s Robotaxi platform with Cybercab,

Now 45 of the vehicles, which do not have steering wheels or pedals, are registered to operate on Tesla’s robotaxi network in Texas. On Thursday night, after the news embargo lifted, the online influencers who attended the event began to post sanguine reviews and clips from their first Cybercab rides.