The U.S. National Highway Traffic Safety Administration (NHTSA) opened an investigation on Friday, September 4, 2026, into whether 1,000 Tesla Cybercab vehicles were properly certified. The probe was announced hours after Tesla began the first commercial deployments of the two-seater autonomous vehicles on public roads in Austin, Texas.
The investigation focuses on the process and technical data Tesla used to claim the Cybercab complies with Federal Motor Vehicle Safety Standards (FMVSS). Unlike conventional cars, the Cybercab lacks permanently attached manual controls, such as a steering wheel, brake pedal, accelerator pedal, and mirrors. While NHTSA recently proposed removing the requirement for manual brake pedals in self-driving vehicles, current law requires human controls unless the agency grants a specific exemption.
NHTSA stated it will examine the basis of Tesla's self-certification, including whether the company determined that certain safety standards did not apply to the vehicle. Tesla told the agency it had self-certified the Cybercab as compliant with all FMVSS rules. As of Friday morning, Texas state records showed 45 Cybercabs were among the 420 autonomous vehicles registered by Tesla in the state. Tesla did not immediately respond to requests for comment regarding the probe.
The investigation sets a precedent for how the federal government handles "self-certification" for unconventional vehicle designs. If NHTSA finds that Tesla's certification was insufficient, it could delay the company's plans to expand the Cybercab service to additional locations. This follows a similar limited commercial deployment approval granted by NHTSA to Amazon's Zoox unit in July 2026 for its own steering-wheel-free robotaxis, marking a transition in how the agency manages the autonomous ride industry.
Next, NHTSA will review the technical data provided by Tesla to verify the company's compliance claims. The agency has not yet announced a deadline for completing the probe. Meanwhile, the Department of Transportation's June 2026 proposal to end the manual brake pedal requirement remains under consideration, which may influence future regulations for similar autonomous vehicles. Tesla has stated it intends to gradually expand its Cybercab service, though the timeline for additional cities has not been reported.