2021 Tesla Model Y Complaint Log

I have had over 18 occurrences of phantom braking while on cruise control; rapid deceleration without warning. I reacted by accelerating with the brake pedal. I reported this twice to the service adviser. One response was I needed to return with a date and time when it occurs again. When I did this, they could not find it in the computer record. They explained this occurs because cruise control is part of the self drive software and that is only in beta stage.

The cruise control and auto pilot functions failed while driving in the rain. The car would not disengage from auto pilot and continually would engage back into auto pilot and eventually locking tires and spinning out across all lanes of the freeway. My safety and all the drivers around me are put at risk when something that dramatic occurs. The car spun out completely out of control and after doing a complete spin the car continued to spin losing all control and ended up inches from the center median and was facing oncoming traffic. Unknown- I instantly called tesla and removed my memory stick from the vehicle, they are still conducting their "investigation". Took it into the dealer and had them look into the issue. They are currently remotely working on what caused the issue with their engineers. No warning lamps or messages appeared prior to the occurence.

The software was updated and I am no longer able to access control for the window defoggers or windshield wipers with one button press. This creates a hazardous driving situation when I need to focus on driving the car. Additionally, the seat will automatically adjust itself to other driver profiles and I am unable to quickly control it, once again creating potentially dangerous conditions.

With Tesla’s new software version 11.0 (Firmware 2021.44.25.2), the enabling of the front and rear window defogger is not readily accessible (they are buried in a menu). In the previous version of the software, there was a dedicated button on the screen to enable each of them. This is a safety issue because of the following scenario that happened to me today, comparing to my experience just the day before: I was driving in the mountains of Colorado, where it was below freezing and snowing. On the 22nd of December, BEFORE the software update, my front window started fogging up VERY quickly. I was able to turn on the front and back window defoggers with one tap. Today, I was driving back and the same thing happened — the window started fogging up. With the new software you had to tap twice, taking away your attention from the road in order to locate the defrost ON button. This is incredibly dangerous. I opted to move to the side and put my flashers on while I did that.

When using AutoPilot, the car will without any basis or immediate need brake most abruptly without any due cause, as there is no traffic or cars around it. It’s usually when passing over overpasses but not always. This sudden deceleration has almost caused accidents. Only me being wary and cognizant has saved the car from being rear ended. Sometimes there’s no cars around but it still can be very dangerous. This has been happening over almost a year and Tesla has not done anything to address this widespread issue.

Phantom braking!! It's happening almost everytime I engage autopilot and it's unfortunate because this system would be amazing if it wasn't do this issue. Anytime I'm in a 2 way highway and I have a semi or a large vehicle coming my way on the opposite lane it decides to slow down from the speed limit around 75mph in Texas all the way down to 35mph, which makes for a dangerous condition and puts me at risk of getting rear ended. I have reached out to Tesla Service and they said they can't do nothing about it. I have videos of these incidents but it seems like I can't upload on these Forms. Please reach out to me so I can send you these videos of the phantom braking.

Vehicle will randomly reduce speed when using the adaptive cruise control.

Tesla recently overhauled the firmware to their vehicles, however the newest update removes much of the ease and functionality. They have removed defogger buttons into the background, and other settings as well, causing the user to have to use multiple touches to work something that previously was quick. I believe this to be a safety issue. Drivers are now unaware where certain settings are and causes drivers to become distracted from the road to a degree that is unsafe while driving.

blind spot warning on the lower left corner of the screen, which is covered by the right hand when driving. With the turn signal, it is impossible to the blind spot warning video without taking the right hand off from the steering wheel. A dangerous situation trying to turn the vehicle with one hand! Also Tesla model Y phantom breaks every time I used autopilot on interstate. Fortunately, no vehicles were behind me. An accident waiting to happen.

When cruise control or Autopilot systems are active, the car will often slam on the brakes and sound an alarm as if there going to be an imminent collision, even thought the lane is clear in front of the car. This happens most likely often when cresting small hills or on curves. There may be a car in coming in the opposing lane, but there is no danger as the opposing car is fully in their lane. The adapative cruise control or Autopilot system decreases the speed very quickly, often reducing the speed by 10-20mph within seconds. This causes panic for the driver and any cars behind us have to suddenly slam on their brakes, creating a dangerous situation. I own both a 2021 Tesla Model Y and a 2021 Model 3 that both have the Tesla Vision Camera based cruise/Autopilot/collision detection system. This problem has gotten worse as Tesla has released new firmware updates in recent months. Many Tesla owners are reporting that they are having the same issues recently. Tesla's response is that the systems are under development and that they will improve over time. The problem is that this is a safety issue NOW! They seem to be overly focused on developing and testing their full self driving systems that they are ignoring a huge safety flaw in their current cruise control and Autopilot systems.

Several times over the past 6 months the car suddenly slowed down without any reason while driving on autopilot with nothing ahead of it on highway (there was no change of speed limit so that can’t be an explanation). Also known as “phantom breaking”

My 2021 Tesla Model Y has two problems related to braking: (1) frequent unexpected and unnecessary slowdowns while driving on Autopilot adaptive cruise control. The vehicle seems to believe something is in the road but it is not the case. This has been called "phantom braking" by many online reports. I experience this on nearly every drive where adaptive cruise control is engaged. (2) On one occasion the car locked up its brakes and began swerving to the left for no reason whatsoever. An alarm appeared on the screen and audible tones and a video was automatically saved. The event lasted only a second but would surely have caused a collision if another car was following me. The event occurred as I passed an oncoming truck on a two lane highway at night in good visibility. I was driving manually. Adaptive cruise control and auto steering were *not* engaged at the time. The extreme braking event was caused by the Adaptive Emergency Braking (AEB) system.

The adaptive cruise control feature frequently hits the brakes despite no obstacles in the road. Major triggers seem to be: Oncoming cars on an undivided highway at night. Oncoming 18-wheelers on an undivided highway at any time in day. Going over the top of a hill. Small bumps in the road at night. A large vehicle with blinking red hazard lights in view. (This will slam on the brakes and set the speed limit to 50 as it seems to think it's an emergency vehicle) Blinking red traffic lights. Sometimes HOV lane entrances will use a blinking red light to show that the lane is closed, and the car will slam on the brakes thinking it's an emergency vehicle. There's a risk of rear-end collisions caused by the sudden decelerations. Most of these events happened on highways with low traffic. No warning lights or messages were displayed before the events.

I was driving on Interstate 80 in NJ this morning. I was in the middle of three lanes. In the lane to the right of me were two tractor trailers. Adaptive cruise control was engaged. For no apparent reason my vehicle suddenly braked hard, startling me and making me wonder what I might have missed in my surroundings. There was no hazard...this was frightening and a major flaw in the system that I have seen referred to as "phantom braking." It has happened to me a couple of times before but never on such a crowded roadway...I could have been rear ended. This component of the vehicle has not been subjected to a service call...the car has 5,000 miles. There was no warning.

I am experiencing phantom braking when using both the features listed below * Adaptive Cruise Control * Tesla Auto-Pilot I have experienced this safety issue when 1. I would be crusing on the road using either of these featuers. All of a sudden, and without warning, the car has applied brakes, even when there's no object / human in the same lane or attempting to come to the lane. 2. I'm cruising in the middle lane of a 3 lane highway, with no vehicles around. This has happened even when vehicles are following behind my car. 3. In both daylight and at night.

While driving my Tesla Model Y using cruise control, the vehicle will continuously brake suddenly for unknown reasons. In several instances, I was worried that the car following me would either hit my car or be forced to take other actions, possibly causing an accident. The system is dangerous and useless. When I contacted Tesla regarding my concern, they said something about the software program evolving…no fix available. I have had my Tesla Model Y in their service center three times and have had numerous phone conversations with them and their customer service department regarding this issue. They said they simply cannot do anything about it. Again, the cruise control system is extremely dangerous. Please require Tesla to resolve this problem immediately. Thank you.

I was driving on a 2 lane highway at about 60 mph in the middle of my lane. The adaptive cruise control was used to manage my speed. Another vehicle was travelling in the opposite direction going toward me, and in the middle of their lane. The other vehicle was an 18 wheel truck. Suddenly, with no warning, the braking system slowed my vehicle. Both myself and my wife felt our seat belts tighten quickly. There was a vehicle behind us, that nearly hit us when the brakes were applied so quickly, for no apparent reason. I had to quickly put my foot on the accelerator pedal to stop the braking, and get back to the correct speed. This has happened several times, usually when driving on a road that gently curves to the right. The sudden braking also occurred when there was no other traffic, just a new section of pavement on the road ahead of us. The loud collision warning sounds came on each time, which startled us. There was no reason for the warning. This caused me to react very quickly, which could have resulted in overcorrection, possibly leading to an accident. After learning about bug reports, I sent in a bug report to Tesla immediately after every incidents I called Tesla to report the problem. They eventually replied that there were no issues with my vehicle, that it was working properly. I set up a service appointment to have the problem diagnosed. I wanted them to diagnose the "phantom breaking". Their diagnosis - "Verified Proper Operation". They noted that it was a "Known Characteristic, future firmware solution". The correction was "Remote education" - they tried to inform me how to correctly drive with adaptive cruise control, then told us to stop using cruise control. My wife and I are scared of using cruise control, as we are sure it will happen again, and someone could crash into us from the rear if it happens again. The way Tesla responded made us feel as if they didn't care about our concerns.

Have a recurring issue with phantom braking, without apparent issue, causing the car to suddenly brake (hard) without warning. (60 mph to 30 mph). This happens when using adaptive cruise control. Dealer has been contacted and their response is that this is perfectly normal, it happens to everyone, and that the car and systems are in beta. They indicate all that mechanical components are in working order and my software is up to date. Over time this may be fixed. Meanwhile, I’m concerned about being rear ended caused by my car's sudden phantom braking. This issue is prevalent in other Teslas and reports on the internet are numerous.

While driving on the highway from Ohio to Arizona in December and returning to Ohio in February when using the adaptive cruise control, my car would suddenly and without warning brake and felt as if it would stop if I had not pushed the accelerator. I drove a total of 10 days, and it happened on some days two or three times, once happening five times. Luckily when it happened the traffic was light, but if someone had been behind me, I'm sure there would have been a rear end collision. It caused my wife and me to lurch forward from the sudden deceleration, and our seatbelts kept us from hitting our heads. When I got home, I reported it to Tesla by phone and was told that someone would get back to me. On March 24 I received an email, stating that "this behavior is a known limitation" and "Traffic-Aware Cruise Control may react to vehicles or objects that either do not exist or are not in the lane of travel, causing Model Y to slow down unnecessarily or inappropriately." Tesla did not offer to remedy the problem, saying only that "The braking behavior will improve over time with software updates." Tesla suggested that somehow I did something wrong, when it stated: "When using Autopilot features it is the driver’s responsibility to remain aware and be ready to take corrective action at all times." There was no corrective action to take except for the sudden braking of the car.

While using autopilot (adaptive cruise control) and driving on two lane highways the car will suddenly apply braking. The braking is abrupt and aggressive. The concern is being rear ended even for vehicles following at a safe distance. The abrupt braking happens randomly and more consistently when there is an oncoming car, especially around turns or hills.

While driving on a two lane highway at 70mph with adaptive cruise control on, every time a semi would approach the car, the car would brake really hard with no notice. Not one car caused this issue. It was only large semis trucks or trailers.

The contact owns 2021 Tesla Model Y. The contact stated that while driving approximately 55 MPH with the vehicle on auto pilot, a large commercial truck in the opposite lane passed the vehicle, which then applied the brakes and slowed from 55 to 35 MPH. The contact stated that this should not have happened and was an instance of "phantom braking". The contact reported that once the commercial truck passed the vehicle went back up to speed within seconds. The contact stated that he did not notice if a warning light was illuminated, but the contact stated that he heard the vehicle sound an audible beep. The contact did not take the vehicle to a local dealer to be diagnosed. The vehicle was not repaired. The manufacturer was not informed of the failure; however, the contact went to the dealer to report the failure. The failure mileage was approximately 1,000.

The backup warning system did not work when I backed out of a driveway on a dark night. I knew there was a black car (sedan I believe) parked along the curb across from the driveway, and could partly see it in the backup camera when the tail lights would turn on (i.e., when I stepped off the drive pedal), but was unable to tell exactly how close I was to the car. There were no beeps from my car to warn me. My car stopped abruptly as the edge of my trunk lid hit what I guess was the corner of the other car. All damage appears to have been to my car - a dent in the trunk lid. I reported all of this to Tesla through their service app, and received a list of places from which I can get an estimate to repair the damage, but never received an explanation from them of their evaluation of the car's records I want to point out that I believe my Tesla includes all camera sensors - a change they apparently made over the summer. My car was ordered in June 2021 for September delivery.

My wife and I purchased our Tesla model Y back in February 2021. We picked it up back in May 2021. The selling point for us was how it drove in the winter since we live in central WI. When we test drove the car in a snow snow at the highland park dealer. The car handled great in the ice and snow due to the car having the winter driving option. My wife nearly got into an accident due to no longer having the option for winter driving. The regenerative braking option is great until you drive in winter conditions. Ice and snow will cause the vehicle to slip and slide whenever letting off the throttle. The safety concern is that if a line of vehicles is in front of you and one person slams on the brakes letting off the throttle is essentially the same thing as slamming on your brakes. Which you never do while in a snow storm. We essentially bought the vehicle with and for this option to to control the vehicle better based on weather conditions. Removing the the winter driving option was not only wrong but a law suit waiting to happen due to the safety issue it brings.

Traffic Aware Cruise Control is just about useless on 2 lane highways. Once enabled it is plagued by frequent decelerations for absolutely no obvious reason. What is more concerning is the application of emergency braking when meeting an oncoming truck, even on a well marked highway where the truck is centered in it’s lane. Fortunately this has not happened to me while I was being followed by a vehicle, but it is highly likely that a large truck or inattentive driver would have rear ended me in this scenario. Tesla service has looked at my car, and told me that everything was working properly, that it was a common complaint and they did not have a fix.

When driving on a two lane road and approaching an oncoming 18 wheeler the cruise control consistently slams on the brakes and I am concerned about the well-being of my 5 and 4 year old in the back seat. It whips them forward. I am also concerned about cars following me and getting rear ended with the force it is applying this phantom braking. I called Tesla and they said this is expected behavior and it might be fixed in a future firmware but no guarantees. I think this is an unacceptable answer regarding the safety of my family.

When traveling down a clear road with no obstructions, the Tesla will unexpectedly put the brakes on, sometimes mildly and sometimes severely when the Speed Sensitive Cruise Control OR the Autopilot is engaged. This is not Tesla full self driving, just standard cruise. This is a known problem that Tesla is aware of and has not addressed. The problem has become much more pronounced in recent software updates. This happens frequently and sometimes causes an unsafe condition causing me to not want to use this feature while driving at all.

Every time I drive on a two lane undivided highway with traffic aware cruise control or AutoPilot engaged, the car will slam on its brakes when a large vehicle is passing in the oncoming lane, even if the passing vehicle is safely passing. Phantom braking with vision only.

Sometimes randomly but often in the spot, when in autopilot, the car will randomly brake hard when there is no car or obsticle in front of me. This has occured when I'm on the highway and I've noticed a pattern that it happens when I go under and overpass. Its usually very sunny and there is a strong shadow in front of the car. I think with the camera vision autopilot it thinks the shadow is an obstacle in the road but I'm not sure. This happens very suddenly and luckily has not happened when a car is following close behind me. But if it did this could definitely cause a rear collision at high speeds.

Driving down the highway/interstate when autopilot is on and the brakes are automatically applied for no reason. This happens frequently, especially on two lane roads to the point where I am not able to use autopilot anymore of fear of the car behind me crashing into me when brakes are applied suddenly for no reason.

When using cruise control on two lane secondary roads the brakes are activated when a large truck approaches from the opposite direction causing vehicles behind me to have to brake unnecessarily. The cruise control is virtually unusable when not on a limited access highway.

When driving with Cruise Control engaged, the car repeatedly brakes VERY HARD. Sometimes the braking is when there is a car in the opposing lane and is approaching but not over the line. Sometimes the sudden hard braking occurs for no apparent reason. But on a two lane highway this occurs VERY regularly. It occurs several times an hour. This is a serious problem because if there is a car behind me the sudden hard braking may cause that car to crash into me from behind. You can submit a bug report to Tesla by pushing the right hand steering wheel button, saying "Bug Report" and then describing the report verbally while driving. This will include all sorts of driving data being sent to Tesla. I have done this dozens and dozens of times. Each time I get a message on the screen thanking me for sending in the bug report. Never once have I ever heard back from Tesla other than the instantaneous message on the screen saying that the bug report has been submitted. I believe that Tesla has had a recall for a very similar problem with the Model S and Model X with Full Self Driving. This recall was fixed almost immediately with an over-the-air software update. However my problem does not relate to Full Self Driving (which my car does not have). This relates only to cruise control. I have spoken to several other Model 3 and Model Y owners who ALL report the exact same problem. A quick search online will reveal hundreds of other similar reports for Model 3 and Model Y owners who do NOT have Full Self Driving. I believe this is a very serious safety problem and needs to be addressed immediately. Regards, Ken Maples

While driving on an interstate highway (75 mph) at about 12am (little traffic) on four separate occasions, with cruise control engaged, the brakes were unexpectedly applied without warning, no forward traffic, no wildlife, no vehicles on the side of the road. Had there been a vehicle behind us, it could have resulted in a rear end collision. Several days later, on a two lane road (55 mph), cruise engaged, with oncoming large delivery/semi vehicles, again, the brakes were applied as if it was an imminent collision - which it was not. We have not seen any warning lamps, messages, warnings - however, we are new to this vehicle and not sure where we would see such a warning. After the latter event, I contacted Tesla service but was told it is an issue being looked at however there were no fixes available at this time. I have not driven with cruise control since as I am very afraid of being rear-ended.

Car is frequently emergency braking when autopilot is enaged and large trucks or semi tractor trailers merge from the right. Car will also unnecessarily and prematurely emergency brake when cars are climbing a hill. The unexpected braking has nearly caused several accidents and we have discontinued use.

When on Cruise Control or using Autopilot mode, there are frequent phantom breaking issues. On a long trip, we experienced phantom breaking consistently on the Highway both at night and during the day. These phantom breaking issues would sometime be significant and immediately drop speeds 10 miles an hour creating a danger of surprising people behind us. On a 2 lane country road, the issues are GREATLY compounded. The breaking would constantly trigger with oncoming traffic in the other lane and break VERY hard with the auto break alarm sounding. At night on a country road, it occurs with almost EVERY oncoming car. It is amazing to me that this made it through quality control because it is easily reproducible. The auto braking feature should just be turned off for country roads if this can't be fixed. At one point, I was right next to an older Model 3 on a mountain passing lane when an oncoming car was coming. The Model 3 was in the left lane closer to the 'danger' and my car phantom braked with the auto breaking alarm coming on and the model 3 just continued on, no issue. No idea if they were on cruise or auto pilot etc.

When driving on cruise control the car will suddenly and randomly decelerate and/or break for no reason. I have had this happen on empty two lane highways and on 4 lane highways with cars around me. It's incredibly stress full and if cars are following too close very dangerous.

While driving my Tesla Model Y with Cruise Control activated, the vehicle would inexplicably brake/decelerate rapidly without any vehicle traffic in front of the car. It would occur at its worst while changing lanes, as I approached another vehicle from behind and attempted to change lanes to overtake. I would either be mostly in the other lane, or had already successfully changed lanes, when the vehicle inexplicably braked/decelerated. It was alarming, frustrating, and infuriating as it seemed clearly unjustified. This occurred while on the interstate, which was extremely dangerous given the speed traveling at as well as the number of vehicles that typically travel on the interstate. I have not used the feature since, and have even attempted to try and disable the feature while still being able to utilize some sort of basic cruise control feature, to no avail.

Tesla's autopilot / adaptive cruise control / emergency braking is defective. On multiple occurrences I have had incidents where the vehicle's adaptive cruise control and automatic emergency braking systems have activated inappropriately. In one occurrence I was driving on I-17 through Phoenix in the middle lane. I was beginning to pass a pickup truck pulling a trailer (my front bumper was just behind the trailer) when the car detected this as an imminent collision and applied significant braking. I had to use the accelerator to disable the emergency braking, and this triggered a number of cars behind me having to brake as well. In a second occurrence I was driving on SR-74 westbound in phoenix between I-17 and Lake Pleasant Parkway. This is a two lane road in many sections, and at one point I had a semi truck and trailer coming towards me in the opposite lane and my car detected this as infront of me and applied emergency braking. Thankfully there was no one behind me as the vehicle reduced speed from 65 to 40 before I was able to push the accelerator and resolve the issue. There have been other incidents of it braking in ways that were unexpected and dangerous. What component or system failed or malfunctioned, and is it available for inspection upon request? Auto pilot / adaptive cruise control / automatic emergency braking How was your safety or the safety of others put at risk? See Above Has the problem been reproduced or confirmed by a dealer or independent service center? NO, but is well known among Tesla owners Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? NO Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? NO

I too have had an issue were without warning or provocation when on cruise control, whenever a semi-truck approached in the oncoming lane, or on four-lane divided highways, my car decelerated from 75 miles per hour to 40 miles per hour in a matter of seconds. I have also had the car phantom break when going under a overpass on a highway and while crossing 2 lane bridges. Luckily no accidents so far but definitely terrifying.

Vehicle will brake hard when approaching oncoming large trucks. This may result in a rear end collision of the following vehicle and possible chain reaction incident. The vehicle has not been inspected and is two months old. This is an ongoing issue and common with this make and model.

When placed in cruise control (which is called TACC: traffic aware cruise control), and driving on 2 lanes road, the car frequently (more than 10 times over 20 miles) slams on the brakes when incoming large vehicles on the other lane. This is generating dangerous situation with following cars being surprised for sudden (and unwarranted) braking occurs. I have a dash cam video of one such incidents

I have been having inconsistent behavior from the autopilot system. The vehicle has hit the breaks hard when no obstacle was present. I have not had this problem verified by a dealer/service center. It happens seemingly randomly. There was no warning before the breaking started.

On Monday November 22 at around 6:15 PM CST, I was driving my model Y and had Tesla's Full Self Driving Beta software engaged. A right banked curve on a two lane road in a rural area came up with a vehicle coming around the curve the opposite direction. The Model Y slowed slightly and began making the turn properly and without cause for concern. Suddenly, about 40% of the way through the turn, the Model Y straightened the wheel and crossed over the center line into the direct path of the oncoming vehicle. I reacted as quickly as I could, trying to pull the vehicle back into the lane. I really did not have a lot of time to react, so chose to override FSD by turning the steering wheel since my hands were already on the wheel and I felt this would be the fastest way to avoid a front overlap collision with the oncoming vehicle. When I attempted to pull the vehicle back into my lane, I lost control and skidded off into a ditch and through the woods, causing significant damage to the vehicle. I was able to retrieve the dashcam footage of this incident and it is attached here. I did analyze the footage myself briefly. You can see the vehicle leave the lane, and within about 10 frames, I had already begun pulling back into the lane before losing control and skidding off the road. Since this video is recorded at about 36 FPS, this would mean I reacted within 360ms of the lane departure. I understand it is my responsibility to pay attention and maintain control of the vehicle, which I agreed to when I enrolled in FSD beta. I was paying attention, but human reaction does not get much faster than this and I am not sure how I could have otherwise avoided this incident. I am thankful this was the outcome rather than a front overlap collision with the oncoming vehicle, which would have likely resulted in bodily injury. Tesla has confirmed that FSD beta was engaged, per the attached correspondence, but insists that this incident and the resulting accident are my responsibility.

Repeated automatic breaking in the assisted driving mode when the road is clear and there are no other drivers or obstacles. The other day my speed was dropped from 55 to 45 mph. It was fortunate no one was behind me.

The latest version of Autopilot has very serious phantom braking issues. It will brake hard frequently for no apparent reason. Other times it will slow down, but not braking hard, also for no apparent reason. It will also beep at me frequently when cars are approaching in the opposite lane, again for no apparent reason. In short, the latest version of AP is all but unusable and more importantly is not safe for us b/c of the phantom braking issue. Luckily no car has been close behind me when the hard braking has occurred but it certainly could be and could cause a serious accident.

Occasionally, while the Adaptive Cruise Control (TACC) is engaged, the vehicle will suddenly brake as if there is an obstacle immediately in front of the car, even though there is not one and the road is completely clear. Sometimes this happens randomly on a divided highway, other times it happens on a two-lane highway when a large truck is approaching in the oncoming lane. Sometimes it is a minor deceleration, other times it is aggressive braking. During one particular road trip, on an empty & divided highway, the vehicle braked unnecessarily over 20 times in a 1 hour span. This is an ongoing issue and continues to occur any time TACC is engaged and there is a clear, unobstructed road ahead of the vehicle. This prevents a safety hazard to any vehicle(s) following behind, as well as the occupants of the offending vehicle, because it could directly result in being rear-ended. When I initially reported this problem to Tesla in December of 2021, they refused to acknowledge it, much less attempt to address it. I submitted a second request for service that same month, 3 weeks later, and their response was the same. However, when I submitted a third request this month (April 2022), the dealer finally confirmed that this is indeed an issue. Yes, the vehicle has been inspected by the manufacturer. No warning of any kind accompanies the malfunction, and there are no discernable symptoms.

When car was in "traffic aware cruise control" on open highway it has multiple times unexpectedly braked hard when there were no vehicles or objects in front of it. Once there was a car behind me so I had to accelerate hard to avoid being rear ended. Once it may have been reacting to an oncoming truck in the opposite lane.

I have 13987 miles on the car. 2 times in 1 month on a 2 way highway that has lane markers on the left side of the road. While using cruise control once and the second time was in auto drive mode going about 60. Hard braking with no notice, good thing no one was right behind me. I took control with no issue but this is really a safety issue. I see others reporting it maybe cars coming toward you. But in one case I was alone no on coming cars. Like I said the road has safety markers that are about 3 ft high.

Using basic Autopilot (adaptive cruise control without auto-steer), the car randomly slams on the brakes putting me at risk of being rear-ended by any vehicles following me.

The contact owns a 2021 Tesla Model Y. The contact stated while driving 55 MPH in autopilot mode, a truck in the middle passing lane going in the opposite direction, approached the vehicle, and the vehicle stopped abruptly. There was no warning light illuminated. The contact continued to drive the vehicle. The contact stated that the failure reoccurred while driving. The dealer and the manufacturer were not notified of the failure. The vehicle was not diagnosed nor repaired. The failure mileage was approximately 300.