NHTSA orders Tesla to prove, under oath, that Cybercab is legal

In the US, carmakers self-certify that their vehicles meet the Federal Motor Vehicle Safety Standards (FMVSS). Regulators don't approve cars in advance; they audit and enforce afterwards. Tesla certified the Cybercab, a two-seater with no conventional steering wheel or pedals, and put it into paid service in Austin on September 4. NHTSA is now testing that certification.

What happened

• September 3–4: NHTSA opened Audit Query AQ26002 into how Tesla concluded the Cybercab complies with FMVSS, many of which were written assuming a human driver and manual controls.
• September 10: the agency escalated with a Special Order containing 21 requests. Answers were due September 30 and had to be signed under oath by a Tesla officer. Incomplete or untruthful responses can bring civil penalties of up to about $139 million.
• NHTSA has not ordered Cybercab rides to stop.

Why it matters

Waymo and others have generally operated modified conventional vehicles, or sought exemptions for novel designs. Tesla's approach is to certify a purpose-built, controls-free vehicle directly. If regulators accept it, Tesla has a clear path to scale a vehicle built only for autonomy. If they push back, Cybercab could face changes or exemption caps, which would slow the fleet expansion Tesla has guided toward late 2026 and early 2027.

Market reaction

The stock fell 5.92% on September 4. Analysts said the Cybercab event offered little new on pricing or production pace, and the NHTSA audit added a regulatory question.

Status

As of October 9 we haven't found a public NHTSA ruling after the September 30 deadline. We'll update this story and the Robotaxi tracker when there is one.