NHTSA Complaint #11453260 — 2021 TESLA MODEL Y

Multiple occurrences of unanticipated hard breaking. Adaptive Cruise Control will slam on the breaks when car is adjacent a pedestrian or bicyclist. The car car doesn't slow down as it approaches a pedestrian walking on the side of the road but slams the breaks on when the car is next to the pedestrian or cyclist. This unanticipated event causes the car to immediately drop in speed between 5 to 30 mph. Any motorists following will not be prepared for this illogical behavior and significantly increases the probability of a rear end collision. This behavior of the Adaptive Cruise Control has also occurred when the car approaches oncoming highway traffic regardless of whether the highway is divided or not. In this event, if the driver of the Tesla model Y does not instantly take over complete control of the vehicle a severe rear end collision can occur. I have not addressed this with Tesla nor have I taken my car in for inspection. I have been told by an owner of a Model 3 and an owner of a Model S that they have also experienced similar situations caused by the poorly calibrated performance of the Tesla Adaptive Cruise Control system. I have been forced to stop using the Adaptive Cruise Control and Auto-steer on my Model Y as this problem is on going.