NHTSA Complaint #11707665 — 2024 BMW X3

I am submitting a supplemental update to my existing safety complaint regarding my BMW vehicle. On December 29, 2025, additional safety-related malfunctions occurred while the vehicle was parked and without the key present. A vehicle window rolled down autonomously, and the heating system temporarily stopped functioning during winter conditions. These failures follow an earlier incident on November 15, 2025, in which the vehicle continued operating without the key present and without any audible or visual warning, while two minor children were occupants. The involvement of multiple electronic systems—including key detection, window controls, and HVAC—suggests a potential electronic network or CAN-bus-related defect. These conditions present risks related to vehicle security, environmental exposure, and passenger safety. The vehicle is currently unsafe for transport of minors and unreliable for use during winter conditions. I am submitting this update so NHTSA’s records reflect continued post-notice safety malfunctions.