NHTSA Complaint #11708160 — 2020 TESLA MODEL X

I am a software engineer and owner of two 2020 Tesla Model X (Raven) vehicles. Both exhibit a serious safety defect after installing firmware 2025.44.25.4 with FSD v12.6.4. Vehicle configuration: Model S/X with MCU2 (Intel Atom) and Hardware 3 (HW3). Defect description: When Full Self-Driving (FSD) is engaged, the vehicle intermittently enters a critical failure state while in motion: • The instrument cluster (driver display) suddenly goes completely black • The center screen issues a red “Take Control Immediately” alert with alarms • The infotainment computer performs a watchdog reset and reboots (Tesla logo appears) while the vehicle is traveling at highway speeds This has occurred multiple times on both vehicles. Suspected cause: The 2025.44 software update appears to introduce additional dashcam telemetry writes (speed, steering, FSD state) to the USB device while recording video. On MCU2 (Intel Atom), this creates an I/O and CPU bottleneck that starves display and safety-critical threads, triggering an operating-system watchdog reboot. Disabling Dashcam immediately stops the crashes, indicating a resource-exhaustion condition rather than driver error. Safety risk: During the blackout and reboot, the driver loses all visual feedback from the instrument cluster while being instructed to take control. This creates a high risk of collision, especially at highway speeds or in complex traffic environments. Severity: Loss of driver display and system reboot while driving constitutes a safety-critical defect. This condition could lead to serious injury or death. I request NHTSA investigation into instrument-cluster blackouts and system reboots on Tesla HW3/MCU2 vehicles when FSD and Dashcam are enabled.