Automatic Emergency Braking problems of the 2021 Tesla Model S

18 problems related to automatic emergency braking have been reported for the 2021 Tesla Model S. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2021 Tesla Model S based on all problems reported for the 2021 Model S.

1 Automatic Emergency Braking problem

Failure Date: 06/09/2023

Third time this week I have been thrown forward into the steering wheel with no cars or objects surrounding me.

2 Automatic Emergency Braking problem

Failure Date: 05/14/2023

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

3 Automatic Emergency Braking problem

Failure Date: 02/07/2023

Oncoming vehicle suddenly turned in front of 2021 Tesla Model S resulting in collision at 34mph. Automatic braking did not engage, collision warning system failed to sound alert. Air bags deployed however seat belt completely spooled out causing the driver to strike the windshield and break the glass by contact with the top of the head. The vehicle was a total loss and the dealer never inspected the car.

4 Automatic Emergency Braking problem

Failure Date: 11/16/2022

When in autopilot, at highway speeds, the car suddenly will brake. There is nothing that instigates this and it seems to be a safety hazard.

5 Automatic Emergency Braking problem

Failure Date: 11/16/2022

Our Tesla, in the "full self drive" mode, has on more than one occasion applied the brakes suddenly without warning while traveling on the freeways. The date I indicate below was the last occurrence. I see that others have indicated this malady and I wanted to add our voice to this conversation. Thank you.

6 Automatic Emergency Braking problem

Failure Date: 09/21/2022

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.

7 Automatic Emergency Braking problem

Failure Date: 09/15/2022

The contact owns a 2021 Tesla model-s. The contact stated that while driving at 72 mph with the 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.

8 Automatic Emergency Braking problem

Failure Date: 08/06/2022

In August 2022 I was driving my Tesla s. I was traveling 25 miles an hour or less. I unfortunately lost consciousness for a very short time. My Tesla then crashed into a parked car. There was snow emergency braking nor any emergency alarms. In theory describes shouldn’t of happened with an emergency braking system.

9 Automatic Emergency Braking problem

Failure Date: 04/13/2022

The vehicle put the brakes on when on adaptive cruise, but with very few cars around. The last time, there was no car in front of me, but the vehicle braked so fast the the car behind me almost rear ended me. I’ve noticed that it happened twice on a south bound stretch of I-35 in temple texas. This needs to be addressed or there is a strong potential for an accident.

10 Automatic Emergency Braking problem

Failure Date: 03/17/2022

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.

11 Automatic Emergency Braking problem

Failure Date: 03/15/2022

It is still unknown, but I believe the brakes failed. My wife was driving and making a left turn into a residential neighborhood when she applied the brake and it didn't respond, even when pushing the pedal to the floor. All that resulted was a clicking noise. The brakes failing to respond, and the emergency braking not engaging did cause an impact with a curb and sidewalk. At the same time, the seatbelt did not lock on impact or when pushing the brake pedal to the floor. The safety of the my wife was put at risk as she could not stop the car. With the cars weight and the amount of power that it has, it creates a dangerous situation for anyone around, especially in a residential area. The vehicle is available for inspection and is currently at the Tesla service center. There was a warning light that said something regarding the "hold" not working and another for "regenerative braking. " I do have the four angle dash cam videos from the Tesla of both times that it did occur.

12 Automatic Emergency Braking problem

Failure Date: 02/22/2022

While using wildly falsely marketed $10k "full self driving" add-on across multiple software revisions and after reporting each and every bug to company I have experienced potentially fatal phantom breaking while at highway speeds and could have been killed by rear ending on at least 4 occasions. Have experienced 20+ erroneous forward collision errors with automatic breaking or lane assist corrections for obstacles such as hills, mailboxes, trees, absolutely nothing at all, etc. When driving around mildly banking left turn corners with 45mph speed limits whenever approaching a left turn lane within median the car will violently lurch into the turn lane causing panic for passengers and nearly causing a collision within resuming concrete median. While using autopilot the car failed to stop, correct or warn when a vehicle entered my lane and caused an accident with several thousand in damages. Car does not properly break for turns on highways requesting driver take over for what should be an easily navigable turn. Doesn't take apex or break early and will drift lanes making other surrounding drivers nervous. Moving the horn from muscle memory location to awkwardly placed touch button has prevented timely use of horn on multiple occasions which could easily result in fatal accidents. Overall this car is a literal death trap not at all even remotely ready for production use on public roads and neither I nor any of my passengers feel safe using the feature that was over priced, over promised and under-delivered. Tesla service center employees too worried about retaliation from management to inquirer about problems because of previous reparations from corporate offices. List of problems is shockingly egregious and should not be legally permitted on roads.

13 Automatic Emergency Braking problem

Failure Date: 02/21/2022

With autopilot engaged, the vehicle will randomly apply brakes at highway speed with no vehicle in front of it at a distance of at least 1/2 mile. The issue seems to be weather independent. The issue occurs on every occasion where autopilot is engaged at highway speed. I scheduled a maintenance appointment for the issue. My last Tesla Model S (2018) did same thing with less frequency. Severe auto braking at highway speed presents serious danger to vehicles behind me.

14 Automatic Emergency Braking problem

Failure Date: 02/17/2022

When travelling around 70-75 miles on autopilot car makes strong brakes which is known as phantom breaking. This is happening every single day on highway which is really scary.

15 Automatic Emergency Braking problem

Failure Date: 02/17/2022

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.

16 Automatic Emergency Braking problem

Failure Date: 02/16/2022

Automatic emergency braking on interstate where it is dangerous to slam on the brakes in the middle of traffic.

17 Automatic Emergency Braking problem

Failure Date: 07/27/2021

On at least nine occasions the car has very suddenly and with no input from driver braked hard during passing another vehicle, when assuming the original lane after passing a vehicle, and, on one occasion when no other vehicle was close by. I have brought all incidents to Tesla's attention. They tell me the problem resides in the software of the car and that they "are working on it". This is a very serious problem, which has been going on for over a year in my case. A totally unacceptable and extremely dangerous situation! occurred in December 21, 2020; several times during the summer of 2021, other sporadic times, and most recently on September 6 and 8, 2022.

18 Automatic Emergency Braking problem

Failure Date: 11/07/2020

Driving on highway at 65-70 mph with auto pilot and speed control engaged. Went to change lanes from left to right. Put on turn signal, cancelled auto pilot by turning steering wheel to right and moved to open right lane. There were no vehicles around us at all. The car suddenly, unexpectedly, and very shockingly slammed on the brakes causing items to be tossed around in the car, engaging all of our seat belts with some discomfort, and sending some loud alarm or warning sound to go off in the car. It scared me, my wife and daughter very much. If there had been a vehicle in the land behind us, there's no way they could have avoided hitting us very violently and causing injury and property damage. This happened 2 or 3 times in my former 2016 Model S, but I never expected it in this 2021 model. A google search will reveal the vast number of Tesla drivers who have had the same or similar experiences.


Other Forward Collision Avoidance related problems of the 2021 Tesla Model S


Safety Ratings of Model S Cars
Fuel Economy of Model S Vehicles
Model S Service Bulletins
Model S Defect Investigations