Key Takeaways
- Federal regulators have elevated their Full Self-Driving investigation into Tesla to an engineering analysis phase.
- The expanded probe encompasses approximately 3.2 million Tesla vehicles — representing virtually every Tesla sold in the United States.
- Regulators have identified nine crashes connected to the technology, with one resulting in a fatality and two causing injuries.
- The investigation targets Tesla’s camera visibility warning system, which should alert drivers when sensors face reduced visibility.
- This escalation opens the door to potential recall actions or other regulatory enforcement measures if safety deficiencies are confirmed.
Federal safety regulators have advanced their examination of Tesla’s Full Self-Driving technology, transitioning to an engineering analysis that encompasses approximately 3.2 million vehicles — essentially Tesla’s complete U.S. vehicle portfolio. The intensified scrutiny could ultimately result in a mandatory recall.
Shares of Tesla (TSLA) declined 1.63% following the announcement of the investigation’s escalation.
The regulatory focus centers on FSD’s camera visibility monitoring system. This technology should identify conditions that impair camera function — such as direct sunlight, foggy conditions, or obstructions — and prompt drivers to assume manual control.
According to NHTSA, evidence suggests this safety mechanism has failed to perform adequately, both in earlier software versions and following subsequent updates.
The agency has documented nine collisions linked to this malfunction. The incidents include one death and two additional crashes that caused injuries to occupants.
Regulatory reviews revealed that in multiple incidents, the FSD system failed to identify circumstances compromising camera effectiveness. Several crashes involved warnings delivered mere moments before collision — providing insufficient time for driver intervention.
Investigators also uncovered additional accidents occurring in comparable low-visibility scenarios where the system either completely failed to detect impaired vision or provided inadequate warning time for safe driver response.
According to Tesla’s internal crash assessments, a software enhancement to the visibility detection system might have altered outcomes in three of the nine documented crashes — had the update been deployed prior to those incidents.
The automaker has not issued a statement regarding the investigation.
Understanding the Engineering Analysis Phase
An engineering analysis represents a significantly more comprehensive stage of federal safety investigation. This phase grants NHTSA authority to obtain extensive technical data from manufacturers and conduct thorough examinations of suspected defects.
Should the agency determine a safety defect exists, it possesses authority to mandate recalls or implement additional enforcement measures. Tesla has undergone numerous NHTSA investigations in recent years examining different components of its driver-assistance systems.
Implications for Tesla
Tesla’s complete autonomous vehicle strategy — including its anticipated robotaxi network — hinges on regulatory approval and consumer confidence in FSD technology.
A potential recall affecting 3.2 million vehicles would rank among the most extensive in Tesla’s corporate history, intensifying questions surrounding a technology the company positions as fundamental to its long-term vision.
The NHTSA escalation continues a trend of heightened regulatory oversight of FSD capabilities. During late 2024, regulators initiated an additional investigation examining FSD performance during impaired visibility, which identified four crashes including one fatal incident.
As of Thursday evening, Tesla has not released any public statement addressing the investigation’s advancement.
