The U.S. auto safety regulator's July 2 letter asks Tesla to defend specific Musk and Tesla X posts on FSD, the driver assist feature Tesla itself labels as supervised.
On July 2, 2026, the National Highway Traffic Safety Administration (NHTSA) sent Tesla a Request for Information asking the company to defend specific posts by Elon Musk and by Tesla's own X (formerly Twitter) accounts. The cited posts include a December 2025 Musk message that told drivers they could text and drive "depending on [the] context of surrounding traffic," a Musk claim that Full Self-Driving (Supervised) can "operate in all conditions," a Tesla-side claim that an upcoming FSD update will "substantially reduce" the need for driver attention, and a Musk reply to a video of a Tesla owner running an espresso machine while reclined in the driver's seat. "This is so cool," Musk wrote. "Make your espresso on the road while your Tesla drives itself."
NHTSA's letter asks Tesla two questions on the record: whether the cited examples are "accurate and consistent" with FSD's actual capabilities, and what the company has done to reduce the potential for "misunderstanding or misuse" (Request for Information INIM-EA26002-14414, via Business Insider). Tesla's owner-facing materials say FSD (Supervised) requires constant driver attention and readiness to take over. The cited Musk posts describe a driver who is texting, reclined, or making espresso. NHTSA is asking which set of claims the company stands behind.
The letter lands inside an Engineering Analysis NHTSA opened in October 2024 and upgraded in March 2026 over FSD's ability to alert drivers in low-visibility conditions, after reports of Tesla crashes in sun glare, fog, and airborne dust (Engineering Analysis INOA-EA26002-10023). The July 2 letter adds the CEO's X feed to that engineering file as capability evidence, alongside the radar and driver-attention questions the agency is already pressing Tesla on, and reaches the wider question of whether the supervised-driver marketing matches the supervised-driver product. The espresso clip is now a row in a federal safety database, attached to a test the agency has been building since 2024.
The pattern is the one that already cost Tesla once. In 2025, a jury ordered Tesla to pay $242 million in a wrongful-death case that turned on whether Autopilot marketing exaggerated what the system could do. Autopilot is FSD's predecessor driver-assist feature. In February 2026, Tesla struck a deal to avoid a California ban after a judge ruled the "Autopilot" and "Full Self-Driving" branding was misleading. Both proceedings used the older Autopilot name, but the test was the same one NHTSA is now putting in writing for FSD: do the labels and the marketing match what the system actually does.
Tesla did not respond to Business Insider's request for comment at time of filing. The agency's second question, what Tesla is doing about "misunderstanding or misuse," is the one a written response will have to answer.
The next concrete checkpoint is the company's written response. NHTSA's Requests for Information carry legal deadlines, and the regulator has already used this Engineering Analysis to pressure Tesla on radar and driver-attention monitoring. A second CEO post, a new owner video, or a fine-print edit to the FSD (Supervised) disclaimer would all be read against the same "accurate and consistent" test. The agency's question is the one the owner's manual has been trying not to answer.