The National Highway Traffic Safety Administration announced on March 19 2026 that it had upgraded its investigation of Tesla’s Full Self‑Driving (FSD) system to an engineering‑analysis level, the highest level of scrutiny before a potential recall. The probe now covers roughly 3.2 million Tesla vehicles, including the Model S, X, 3, Y and Cybertruck models that can use the FSD driver‑assist system.
The escalation follows a series of crashes in low‑visibility conditions, including a fatal incident involving a pedestrian on November 28 2023. The preliminary evaluation that led to the escalation began in October 2024, and the NHTSA has requested detailed data on how the system detects and warns drivers when visibility is degraded. Tesla’s own response to the fatal crash was to begin developing an update to its degradation‑detection software on June 28 2024, after submitting a report on June 27 2024.
Cybertruck models have been receiving FSD (Supervised) updates since October 2024, with version 12.5.5 initially deployed and version 14.2.2.5 rolled out by February 16 2026. The new investigation will require Tesla to provide data on these updates as well as on the broader fleet of vehicles that can run FSD.
Investors have reacted negatively to the announcement, reflecting concerns that the investigation could delay Tesla’s robotaxi plans and increase compliance costs. The probe underscores the regulatory risks associated with Tesla’s camera‑only approach to autonomous driving, a strategy that has attracted scrutiny from regulators and competitors who use radar or lidar.
The investigation could lead to enforcement action if the NHTSA finds that the FSD software fails to meet safety standards. A recall or mandated software restrictions would directly impact Tesla’s revenue from FSD subscriptions and could erode consumer confidence in the company’s autonomous‑driving ambitions. The outcome will also influence the broader market perception of camera‑only autonomous systems and may affect Tesla’s competitive positioning in the emerging robotaxi sector.
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