NHTSA Complaint #11469197 — 2021 TESLA MODEL Y

There are 4 issues to report for our Tesla Model Y: 1) On the highway, our Tesla often presses on the brakes and slows down by itself when it should not be doing so. This occurs when we have adaptive cruise control on. We’ve noticed that at the time of the slowdown, the Tesla misreads the highway speed limit. For example, the Tesla will read the speed limit as 70 mph, then all of sudden without warning, the Tesla will suddenly read the speed limit at 40 mph, which then causes the Tesla to break and slow down by itself, when the speed limit is actually still 70 mph. This can happen several times on a single highway trip. Aside from the shock we receive as a driver as our vehicle slows unexpectedly, this could cause a rear end collision if a car is following us too closely from behind. 2) When we use adaptive cruise control and the steering assist feature, the car does not recognize to slow down on highway off ramp curves. I monitor the speed around curves, though if a driver is not aware of the issue and expects for the Tesla to take the curve slowly, this could cause an issue. In particular, if there is a big curve, I’d be concerned of the Tesla losing control and going off the road, due to speed. 3) The car will often provide a frontal collision warning, even if there is no car or object in front of the car, while it's in motion. This can lead to confusion for the driver or possibly hard breaking, which could cause a rear-end collision, if a car is following too close behind the Tesla. Also, the Tesla driver may swerve unnecessarily to avoid an object that isn’t there, which could cause a collision. 4) The Tesla is advertised as being able to travel over 300 miles on a single charge, however, the conditions for this to happen seem incredibly difficult to meet, as mileage is usually far less than this. This can cause drivers to overestimate how far they can drive, which could lead to cars urgently pulling of the road to prevent stalling where traffic is.