2019 Tesla Model S driver assistance problems

Filed Sep 19, 2025 · Driver assistance · OH

Tesla’s software updates have rendered systems useless the vehicle wants to hug and sometimes cross the left double yellow lines. It cannot hold a constant speed and since their implementation of “supervised” full self driving, have made my vehicle unsafe

Filed Apr 20, 2025 · Driver assistance · FL

My Tesla supervised FSD is a safety hazard. Promised programming updates have not improved the erratic, UNSAFE “assistance. I try it after each update, but I’m afraid to rely on it other than 5-10mph bumper to bumper road conditions. I don’t have one specific occurrence to report and thank goodness no fatality!

Filed Sep 10, 2024 · Brakes, Driver assistance · MA

Vehicle suddenly stopped on highway luckily there were no drivers behind me. The vehicle all of a sudden started beeping even though there was a clear path and no obstructions. Then stopped. I was panicked and in awe at what was happening. I couldn’t get the vehicle to drive I was just stuck for 10-15 seconds. I was finally able to get the car moving again but the problem hasn’t happened since. Any information as to what may have gone wrong may help other Tesla owners who may or may have not experienced this… yet

Filed Jul 24, 2023 · Brakes, Driver assistance · TX

Driving on autopilot on the highway, the car suddenly brakes with not apparent reason.

Filed May 8, 2023 · Driver assistance · 24,500 miles · CA

The contact owns a 2019 Tesla Model S. The contact stated while driving 76 MPH with the adaptive cruise control activated, the vehicle experienced phantom braking and decelerated to 45 MPH. The contact stated that the cruise control function then activated and operated as designed and the vehicle then regained speed and accelerated to the desired speed. The failure occurred twice within 20 miles. The contact stated that during the first failure, there was no other vehicles nearby; however, the contact had passed another vehicle the second time the failure was experienced. The dealer was made aware of the failure; however, the mechanic was unable to duplicate the failure. The vehicle had not been diagnosed or repaired. The manufacturer was made aware of the failure. The approximate failure mileage was 24,500.

Filed Jan 18, 2023 · Driver assistance · FL

driving on the HOV lane, no traffic at all, and the tesla applied the brakes x 2. It happened today at 4:03 pm.

Filed Oct 26, 2022 · Brakes, Driver assistance · NM

With increasing frequency in recent weeks, my tesla brakes without warning. It seems to occur while under adaptive cruise control. At times the car is approaching a road sign. At other times there is no reason apparent to me. The adaptive cruise control works well otherwise.

Filed Feb 28, 2022 · Driver assistance · WA

When driving with AutoPilot enabled, I am experiencing the same issues as many others. Without any warning or reason, the car will sometimes slam on the brakes which puts the occupants in my vehicle and the cars behind me in danger. I have had to punch the throttle quickly to correct the situation but often the car has slowed 20 MPH by that point. My estimate is that it happens ~5 times per hundred miles travelled on freeways.

Filed Feb 17, 2022 · Acceleration, Brakes · WI

Repeated unexpected emergency braking incidents, similar to those described in the recent Washington Post article. The first one happened on the day that I bought the car, and has never improved. One scenario is the same as described in the article - oncoming car/truck on a two-lane road. But it also happens on freeways. If cruise control is on, it's likely that there will be at least one event during a 30 minute or longer session. As others have mentioned, these are often in congested traffic. When a car is following closely, they have to react very quickly. In several cases they have gotten angry because they think I'm slamming on the brakes to discourage them from tailgating. The very first incident, on the day I bought the car, was hair-raising. The car slammed on the brakes in the middle of an interchange where a semi was close behind and there was dense traffic all around both of us. Fortunately the driver was very alert and avoided me without endangering anybody else. But things could have gone the other way. I've mentioned it to local Tesla service people who (at the beginning) said that the car was in the learning period, calibrating the sensors. The user documentation mentions this and suggests that the training interval could be as much as 100 miles. It gets worse and better as Tesla fiddles with the software. It did indeed get quite a bit worse with the release of the Full Self Driving beta -- which I have qualified for but never actually used because... heck, if they can't get cruise control right, I sure don't want them to take on any more responsibilities.

Filed Feb 6, 2022 · Driver assistance · CA

The car would apply the brakes for no reason while using cruise control.