This car is three months old. Driving near my home on a four-lane divided road with 55MPH speed limit. While having either cruise or auto-steer enabled and using cruise control only, experiencing ongoing instancesâ’during every driveâ’of unexpected and unexplained hard, sudden braking, reducing vehicle speed dramatically (multiples of 10MPH in less than five seconds). Each time, there has been very light traffic, and there is nothing I can see on the road that could explain the reason for the braking, hence the unexpected nature. The problem could easily cause a rear-end collision soon if another car is following closely, and Iâm not able to correct and accelerate fast enough. Vehicle is very clean all around, including camera locations, and the weather is perfectly sunny and temperate each day. I do not recall this event happening while driving at night in my semi-rural area. I have not yet reported the problem to Tesla, so they have not inspected or attempted service on the vehicle.