While driving a 2026 Tesla Model Y Premium on [XXX] at approximately [XXX] PM on [XXX] using Full Self-Driving (FSD) Supervised mode, the vehicle was traveling in the center lane (lane 2 of 3) when it ran over a large whole tire (commercial truck-sized) that was positioned in the center of the lane. The FSD system failed to detect or avoid the tire prior to impact. This incident demonstrates a critical safety limitation: Tesla FSD cannot detect large road obstacles such as a whole commercial truck tire positioned in the center of a highway lane at night. The FSD system showed no warning, took no evasive action, and did not alert the driver prior to the impact. Prior to the incident, there were no warning lamps, error messages, or any abnormal symptoms. All systems were functioning normally. Following the collision, a "Coolant Low - Schedule Service / Climate and driving performance may be limited" warning appeared immediately on the display screen. Upon inspection, all coolant had leaked out completely. Damaged components include: underbody, front bumper lower section, and cooling pump. The cooling pump damage is particularly concerning as it prevents proper battery temperature regulation, creating a significant risk of battery overheating and potential fire. The vehicle is currently at a Tesla-approved collision center. Inspection is still in progress. The vehicle has been reviewed by Tesla Service Center technicians and insurance representatives. Safety concern: Tesla