NHTSA Complaint #11581044 — 2021 TESLA MODEL 3

On or around March 31, 2024 Tesla delivered a software update to my vehicle that changed the way adaptive cruise control is engaged, as well as the behavior of the vehicle when the setting is activated. In the few days since the change, I twice inadvertently engaged the adaptive cruise control, once while attempting to park on a congested residential street where it was very dangerous to have the vehicle accelerate without my taking action. I panicked and was able to shut it off quickly, but I didn’t know why it had been enabled. Today I was driving and had intentionally engaged the adaptive cruise control when the car attempted to signal and change lanes. This was wholly unexpected, and I was not prepared to monitor the vehicle taking other actions besides maintaining its lane and speed in traffic. I reviewed the settings for the feature and discovered the adaptive cruise control with lane guidance, termed “Autosteer” in the Tesla vehicle, had been replaced by “Self-Driving (Supervised).” The activation of the feature was changed from a double pull on the shift lever to a single pull. This explained my twice inadvertently activating the feature, and the car propelling itself forward unexpectedly, on those two other occasions. It is extremely dangerous for the car manufacturer to suddenly and without warning change the way the vehicle is operated. I believe I was fortunate to avoid an accident on two occasions while the vehicle unexpectedly took control over driving. Had I not reacted within one second to disable the feature, I might not have avoided a collision.