2021 Tesla Model S: brakes engage by themselves (phantom braking)

Filed Aug 25, 2023 · Acceleration, Driver assistance · CO

Vehicle braked without warning with cruise control engaged. Luckily there were no other vehicles near us when this phantom braking occurred.

Filed Jul 30, 2023 · Driver assistance · CA

The adaptive cruise control has had phantom braking issues from day 1 of ownership (and through every software release from Tesla as I always update when a new one is available). Most of the time it's not possible to identify exactly what triggers the event. However, on July 27th 2023 I drove from Phoenix to Sacramento via I10, I210, I5 and had 6 phantom braking events. 5 were directly correlated with passing a semi with me in the #1 lane and the semi in #2. I had the car in adaptive cruise control mode, but I maintained steering control. The car approached the semis normally, but as soon as the car was completely alongside the truck it began braking aggressively. More than just allowing regenerative braking to slow the car, the brakes were applied. This did not happen with every passed truck, maybe 1 in 10. One of the 6 phantom events could not be correlated with any clearly identifiable cause. There is no warning when the car begins decelerating so it is a surprise to the driver. Further it is an extreme hazard to following vehicles who WILL be forced to react. I have not directly reported my specific events to Tesla. For one thing they have no reasonable way to do this (online access, phone access. The number they give to report problems hits an automated phone tree where there is no option for reporting issues). Clearly Tesla is well aware of their phantom braking issues. I'm reporting this to you now in order to apply more pressure to Tesla to finally resolve this. In general, considering some of the other phantom braking episode beyond this one specific trip, I have occasionally noticed the car displays a yellow signal light on the driver's display but only while phantom braking has already begun. I believe this is case where the car believed it saw a caution sign or signal light in it's cameras and was reacting to that. There were no signal lights, but the sun was either coming in that direction or reflected off of other vehicles or buildings.

Filed May 14, 2023 · Brakes, Driver assistance · MS

Another automatic phantom braking throwing us toward in the car with no objects or other cars in proximity.

Filed Oct 26, 2022 · Driver assistance · VA

Today was at least the 3rd time "phantom braking" has occurred. While traveling on I-64 in Virginia, my speed was about 75mph with adaptive cruise control on. Suddenly, the car braked hard, slowing to about 40mph. I thought the car was going to stop. Fortunately, there were no vehicles behind me or there could have been a rear end collision. I did not use the automatic feature again for the rest of that drive.

Filed Oct 1, 2022 · Acceleration, Driver assistance · WI

The vehicle intermittently brakes for no reason with the cruise control enabled. This is going to cause an accident.

Filed Sep 27, 2022 · Driver assistance · TX

I have had multiple phantom forward collision warnings while driving and phantom braking while in autopilot. It happened twice today on a short 10 mile drive.

Filed Sep 26, 2022 · Driver assistance, Electrical · 17,102 miles · TX

The contact owns a 2021 Tesla Model S. The contact stated while driving 70-75 MPH with the Autonomous Self-Driving feature activated, the vehicle experienced phantom braking on numerous occasions. The dealer was made aware of the failure and informed the contact that the vehicle performed as designed. The vehicle was not diagnosed nor repaired. The manufacturer was made aware of the failure. The contact related the failure to the Full Self-Driving (FSD) Beta 10.69.2.2 software update. The failure mileage was 17,102.

Filed Sep 15, 2022 · Driver assistance, Electrical · 56,292 miles · MS

The contact owns a 2021 Tesla Model S. The contact stated while driving 72 MPH with the autonomous self-driving feature activated, the vehicle experienced phantom braking. The vehicle was not diagnosed nor repaired by an independent mechanic or dealer. The manufacturer was not made aware of the failure. The failure mileage was 56,292.

Filed Mar 19, 2022 · Driver assistance · VA

On March 18th and March 19th we have experienced 4 episodes of unexpected emergency phantom braking while using auto pilot. Once on the 18th and 3 times on the 19th. Only once was there another car in our vicinity and that car was next to us within their lane passing us at the time. All 4 times the cars collision warning chimed and hard emergency braking was applied by the car for no reason. If there had been cars following us we would have been rear ended. To date these are the only times this has happened. Tesla says they have no current fix. There was no indication of any problems with the auto pilot/collision warning prior to this.

Filed Mar 8, 2022 · Acceleration · CA

experiencing phantom braking. On a recent trip I had several episodes of phantom braking where the vehicle slammed on the brakes without any obstacles in front of the car. Just an open road. While this has happened on two lane roads with oncoming traffic on this recent trip it happened on a freeway with nothing in front of it. There were a lot of bugs in the air and I'm wondering if a bug hitting a camera was the cause. Also, the car at a stop light gave me a heads up that the light had changed. Without looking at the lights I started to accelerate only to find out that it picked up the left and turn light not the light controlling my lane. Almost crashed into oncoming traffic.

Filed Feb 22, 2022 · Driver assistance · CA

Car experienced “phantom braking” at freeway speeds (it suddenly and unexpected applied brakes by itself) - AutoPilot was engaged and was on freeway. There were no vehicles or objects in front of car. It was a multi lane freeway and multiple lanes on either side. Was extremely dangerous and could have caused a severe accident had i not taken evasive action and taken control/overridden immediately (would have otherwise been rear-ended).

Filed Feb 18, 2022 · Brakes, Driver assistance · NV

While in autopilot, the car brakes for no reason, phantom breaking. This happens while in right lane near exits, and happens inconsistently while in other lanes. It dropped from 83 on autopilot to 49 in one instance. The person in the back seat almost drove her head into the back of driver seat. The passengers will never buy a Tesla. Another issue, important controls for the car are not intuitive for use and provide distractions from driving. The blinkers and horn as well as tire pressure gauges and other items necessary for safety are too “non conforming”. Someone please address these issues with Tesla. Also, almost every control is so small and flat with no raised markings, those with essential tremors are susceptible to not be able to reach or activate controls due to the extremely small size of the controls.