2021 Tesla Model Y Complaint Log

A recent vehicle software update now has a speed limit alert stuck right in the middle of the touch screen display. It's unnecessary, annoying and intrusive. Tesla service said to get rid of the alert I need to TURN OFF the speed limit setting!!! Discouraging us from using the safety features is not an improvement. I recommend the NHTSA reqiure Tesla to locate the alert in another area of the display that will be visable but not distracting and annoying.

-Tesla autopilot phantom emergency braking, multiple times makes using the autopilot useless, can't even set it to just cruise control. Yes. -Hard, unexpected, emergency braking at highway speeds from 75mph to immediate 35mph. Dangerous to passengers and other motorists due to the sudden, unexpected high deceleration speed. -Yes. Reported the problem to Tesla service center Spokane on 11/15/2021. They performed a remote investigation and told me I had used the car in a manner/location that was outside the current limitations of the software. No further action until the software system is updated sometime in the future and remotely closed the service appointment without any further input from me. - No. Phantom braking started the day I picked it up 9/24/2021 and continues to this day.

Driving I5N near Delmar with auto pilot in daylight, car suddenly braked while there was no obstacle, or any other car in front of it. Luckily no one rear-ended me. Max cruise speed was set to 75 MPH, and speed suddenly dropped below 45 MPH. The maximum cruise speed I set to also automatically changed to 45 MPH as well.

The contact owns a 2021 Tesla Model Y. The contact stated while driving 50-70 MPH on cruise control, the vehicle would inadvertently decelerate, almost causing other vehicles to crash into the rear of the vehicle. There were no warning lights illuminated. The contact also stated that the vehicle was designed with no radars and was built with camera vision instead. The manufacturer was made aware of the failure but did not provide any assistance. The contact stated that the failure had been reoccurring more frequently. The vehicle was not diagnosed or repaired. The approximate failure mileage was 20.

Vehicle braked suddenly on the exit lane of a highway around noon time, when there was no car ahead of me. There was a large truck passing on the adjacent lane. My car gave a red color warning of imminent collision and braked hard. Fortunately, I avoided having an accident with cars following me by pressing on the gas peddle and moving ahead. Tesla service remotely reviewed and determined that at that time emergency brakes were applied because the car detected an object. Tesla said it could have been a reflection, the sun, or any number of things that could have triggered the false detection causing the vehicle to brake.

The contact owns a 2021 Tesla Model Y. The contact stated that while driving at 60 MPH, the lane assist feature operated independently as he attempted to merge into the right lane. Due to the failure, the vehicle pulled back into the left lane which caused the vehicle to spin in a circle and crash into a median. The air bags did not deploy upon impact. The contact was not injured as a result of the accident. A police report was not filed. The vehicle was initially towed to the dealer where he was informed that the vehicle would be towed to an independent body shop for repair. The vehicle had yet to be repaired. The failure mileage was 24,300.

The cruise control on my Model Y frequently slams on the brakes for no apparent reason (no obstacle or vehicle in my lane). This happens at all speeds (from 30mph to 75mph). The cruise control is so unsafe and scary that I will not use it at all with other passengers in my car or when I have a car following me. My car slams on the brakes so hard it makes it completely unsafe for me and the people following me. In my opinion, it drastically increases the chances of being involved in a rear-end collision. There is no ability in the Model Y to use cruise control that is not adaptive-based. Until this problem is fixed, Tesla needs to offer a cruise control option that is 100% controlled by the driver (standard cruise) where the speed and brakes cannot be changed by the car. My car has not been inspected by the manufacturer and this has not been reported to the manufacturer because it is a widespread and known problem, and Tesla is not currently doing anything to help others who have reported the issue.

On a recent trip to Minnesota when adaptive cruise control was engaged there were several ( >10) episodes when the car would suddenly decelerate for no apparent reason. On a two lane highway it might occur if a large vehicle such as a truck was oncoming in the opposite lane. On the interstate, the common scenario was traveling in the right lane going up a slight upgrade with a car passing in the left lane. Often the sudden speed reduction was 25 mph or more. On occasion even on a flat section the car might suddenly brake for no apparent reason. On one occasion this happened in the afternoon going west with the sun glinting off some shiny asphalt crack filling. No accident occurred, but if a car were following closely, sudden braking could cause a crash. Because of this erratic behavior I don't use adaptive cruise control except for short distances. This is a known Tesla problem, but it seems the company is more interested in enhancing games to be played while charging rather than attend to a major flaw.

The car will hard brakes all the time on autopilot. I've had it occur going up slight hills, the sun being out, rounding bends, etc.

While using Tesla Autopilot, I’m receiving significant “phantom breaking” events where the vehicle, for no apparent reason, applies the breaks, quickly and unexpectedly decelerating at highway speeds.

The autopilot randomly applies the brakes. Sometimes it applies the brakes on a 2 lane highway when a truck or large vehicle approaches in the oncoming lane. Other times nothing is in the lane and it slams on the brakes. Other times the forward collision warning starts making noises and nothing is in front of me. I took the vehicle in for service, but of course the Tesla tech could not duplicate. Although the invoice says "autopilot will improve as firmware is released."

This is our second Tesla, so I am familiar with the function of adaptive cruise control and autopilot. Vehicle frequently initiates hard braking events without warning or cause on the highway. I have contacted Tesla service, and they are stating that the car functions normally, and that this is normal behavior. If this is normal behavior, it is definitely unsafe. I have almost been rear ended several times.

This car is continually slamming on the brakes when in cruise or autopilot I have reported this to Tesla and tried to have them repair it but they say it’s normal. My 2019 didn’t hav3 this issue. One time I’d did this my wife started to chock on her gum when it slammed the brakes on so hard it dropped about 40mph in a few seconds.

(1) My car dangerously and aggressively applies the brake dropping the speed of the car between 3 to 30 mph within a second or two (phantom breaking) EVERY SINGLE TIME I drive the car in adaptive cruise control or auto steer. This happens on 2 lane roads, on divided highway, driving on straight and curvy roads, when there are shadows, frequently when a truck or car is coming toward me, and even on overcast days when driving on a freeway when there are no shadows and no traffic in either direction. The car seems to be sensing an object that is going to cause a collision and applies the brake even when no object, threat, or shadow is anywhere in view in any direction. I frequently have to immediately step on the accelerator to keep from getting rear-ended in what could be a severe or fatal accident. (2) On a 225 mile drive to the Tesla Service Center to correct the phantom braking problem, my car inappropriately applied the brake 40 times, including aggressively dropping the car's speed from 63 mph to 35 mph in a second or two. (3) My car dangerously and aggressively applies the brake whenever a car is turning in front of me that is sufficiently far enough away that there is no absolutely no threat whatsoever of a collision. I then have to quickly step on the accelerator to keep from being rear-ended. (4) I have taken the car into the Tesla Service Center twice to correct this problem. I even gave them a list of dozens of times/dates I experienced phantom braking and the # of mph the car slowed (I recorded this on paper and as "bug reports" on the car's computer). On one visit the technician spent 12 hours reviewing my bug reports and the car’s operation. In both of my Service Center visits the bug reports were sent to a Tesla engineer for review. After both visits to the Service Center I was told the technician and the engineer could find nothing wrong with the car and “it was working as designed.” (5) In conclusion, my Model Y has a SEVERE safety defect.

Sudden, hard self breaking when in autopilot mode. Danger of collision at high speeds.

Tesla delivered a car with a concerning mechanical defect on all four hinges of both rear/forward doors. There are deep gouges to the metal on all four hinges. They have no explanation as to why the metal that holds the doors I place has been damaged. Multiple calls to Tesla has resulted in them saying they will absolutely not look at the issues on the car until December 10th. They said that I can't even bring it in to a service center for safety inspection. I wanted to reject delivery and get a safer car but they said that I would then not receive a car for 4-6 months later. Meanwhile they had already accepted payment, so I would be on the hook for payments. I don't know if these.doors are safe, I'm looking for a Tesla to say whether the car is safe to drive or not, and find out what caused the damage. Tesla will only tell me that they will look at the car in December.

Our 2021 Model Y features the new vision based cruise control system, both traffic aware cruise control and autopilot utilize this camera only system. At the time of ordering we were under the impression we were getting a much safer and mature radar based system. Upon accepting delivery at the end of May we have accumulated 9,000 miles on the car and have a had horrible experiences with the traffic aware cruise control slamming on the brakes for no apparent reason with nothing ahead or passing cars. Behavior can be 5-10mph slowdowns or in some cases FULL brake pressure which puts us in danger of being rear ended. Multiple times we have been close to rear ended. In addition the system can also produce audible beeps when cars pass however no warning or message is displayed. I want to stress this behavior is a daily occurrence day or night. We have reached out to Tesla in order to get the vehicle looked at for repairs and have a been denied even a service appointment. The vehicle was declared fine hardware wise. I documented our experiences in just one evening of driving and put together this YouTube video showing the behavior. https://www.youtube.com/watch?v=20ETPyzjc_U As referenced in the video below Tesla explains the cruise control is BETA and to be ready to take over at any moment. I take great exception to the practice Tesla is utilizing of declaring previously standard features "BETA" and making customers deal with their poor results with no accountability. We don't accept BETA seatbelts or BETA tires. This feature was enabled by default on the car upon purchase and it objectively doesn't work safely. This compliant is really an act of desperation as we simply have no other avenue to express our frustration and safety concerns for a half baked feature.

The Vehicle was in FSD Beta mode and while taking a left turn the car went into the wrong lane and I was hit by another driver in the lane next to my lane. the car gave an alert 1/2 way through the turn so I tried to turn the wheel to avoid it from going into the wrong lane but the car by itself took control and forced itself into the incorrect lane creating an unsafe maneuver putting everyone involved at risk. car is severely damaged on the driver side.

We have had issues with the “autopilot” function braking when no obstruction exists. Situations that trigger these unnecessary breaking events generally involve shadows on the roadway, visible disturbances such as reflected sunlight, or other visual circumstances that in some way impact the appearance on the roadway surface. These appearances are generally widespread on county roads and state highways, but are less frequent on the Interstate highways. Due to the severity of these breaking actions we have greatly reduced the use of the “Autopilot” feature, and now only us it sparingly on the interstate when the lighting conditions are good. Due to loss of confidence we use it very infrequently, only once every few weeks at most. These emergency breaking events are greatly unwarranted 95% of the time. In addition, we feel that the unexpected nature of these events and the severity of them have increased our risk of collision. This is due to the unexpected and unintended breaking causing an accident from a vehicle rear ending us on the highway. We have not been in a collision yet. I feel that this feature is not yet ready for release and it should be disabled or rolled back until such a time it can be trusted to not increase the risk of collision for the occupants. To answer the questions specifically: What component or system failed or malfunctioned: Autopilot / automatic emergency breaking. How was your safety or the safety of others put at risk?: Uncommanded and unwarranted emergency breaking increases risk for an accident. Has the problem been reproduced or confirmed by a dealer or independent service center?: No Has the vehicle or component been inspected by the manufacturer or others: Remote diagnostics performed by manufacture. No problem found. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear?: Other then alerting to the breaking action, no warnings have been displayed.

Autopilot suddenly breaks to a dangerous levels while driving in the highway. Sometimes this happens with incoming cars/trucks on the other line. I have to manually take over control as I am worried I might be rear ended. These events are very likely to happen at least once on a given commute. This sudden braking also happens while going over a certain bridge. This has happened to all drivers in this car.

I have experienced 3-4 occurrences of "phantom braking" while driving on the freeway with the autopilot system engaged on my Model Y. Each time, i have been traveling at 70mph+ when the automated system suddenly slammed on the brakes, causing me to decelerate by 20-40mph before I was able to override the systems by stepping on the accelerator and disconnecting the autopilot system.

Vehicle applies brakes suddenly while cruise control is active at highway speeds, for no discernible reason. This happens extremely often and has almost caused the person following to rear end me on multiple occasions

Since purchasing the car less than a month ago, there have been over 100 phantom braking events while using cruise control. The vehicle will suddenly SLAM on the brakes with no apparent reason, even when there are semi trucks following closely behind. The only way I have avoided rear end accidents is by emergency presssing the accelerator. It is incredibly dangerous.

While driving on well marked highways, the adaptive cruise control would initiate rapid and unsafe braking while using the vehicles “AutoPilot”. The braking is equivalent to a user putting full pressure on a brake pedal, losing 10-20mph by the time I am able to intervene, even if I’m ready to take over. Such rapid deceleration leaves me vulnerable to a rear collision from following drivers There is no warning, and no alarms from the vehicle. The manufacturer has no specific response, other than advising a system reset. The system reset does not solve the problem.

Two issues: 1) alarming clunking noise coming from suspension. 2) center command screen froze and then crashed completely (black screen) while driving, which resulted in a loss of controls like turn signals and speed indicator.

While driving using cruise control the vehicle will occasionally brake suddenly for unknown reasons. In one instance I was worried that the car following me would either hit my car or be forced to take other action possibly causing an accident. When I contacted Tesla regarding my concern they said something about the software program evolving…no fix available. The cruise control system is Dangerous. There is NO warning, you are traveling down the highway, all seems fine, and then for no apparent reason the car applies the brakes so hard that everyone in the vehicle is startled and vehicle behind you sounds their horn!

On numerous occasions while using cruise control the the Model Y brakes would be suddenly applied in the following situations. While in the inside lane of a curve in the road when several approached from the other direction the brakes would be suddenly applied when the front of the Model Y was pointing at one of the middle vehicles in the line of approaching vehicles. This sudden braking does not happing when traveling down straight sections of roadway or when traveling in the outside lane of a curve.

I had 2 accidents both caused by the wheel forcefully turning and not letting me take over. First incident: On 8/31/21 I was driving on the right lane of the palisades pkwy S (NJ) the car was on “autopilot” my hands where on the steering wheel. It was raining, there was no car around me for at least a few hundred feet. Suddenly the “forward collision warning” started beeping, and I felt the steering wheel is forcing itself very sharply to the left, I tried turning back to the right, but I couldn’t. Fearing that the car will end up in the lane of the opposite traffic, I slammed the breaks. The car ended up doing a 180 hitting the dividing guardrail against oncoming traffic. The car was towed to a shop where it was until oct 18 when it was ready for pickup, damage costed about 15k to repair. There was no injuries, and no other car involved. Second incident: On oct 26 A week after I picked up the car from the repair shop, I was driving on the NJ Turnpike N on the left most lane. It was raining, and the car drove over a small puddle of water. Suddenly I felt the steering wheel turning very forcefully to the right. I tried pulling back to the left, but was unable. it felt as if the steering wheel was locked, causing the car to abruptly make a hairpin curve, bypassing the next lane, and hit a car two lanes over. From the impact the car was thrown back to the left, knocked into the highway divider, the car then spun and flew all the way to the other side of the highway. This time there was another car involved. I was in the car with my wife, both of us besides being all shaken up had no injuries, it is not known to me if there was any injuries to the other driver My car was a total loss. In both instances I felt the car taking over the steering wheel and not letting me take back control. The first incident was on autopilot, second time was not. I have dash-cam footage of both incidents (can’t upload it here, will provide upon request)

On two occasion, our brand new Tesla model Y lurched forward from a complete stop. The first time, on 2021/10/09 at 4:36pm I was at a car wash and trying to put the car in neutral. Fiddling with the gear selector, the car jumped forward without me touching the pedals. I hit the breaks and neither the car or anyone else was injured. The second time, on 2021/10/25 at 8:10 am, my wife was dropping off the kids at school. At full stop the car lurched forward again without her touching the pedals or the speed controller. The car hit the car in front of it 3 times with force. The car as well as the two other cars in front of it got seriously damaged. My two year old son was on board, there was many middle schoolers around but thankfully no one was injured. Incidents were reported to Tesla right away who has assured us they would investigate but we have had no update since despite contacting them multiple times. They assured us they have the ability to download telemetry remotely but I am concerned that as time goes by data will no longer be available. We later got an alert on the app that the emergency braking system had been disabled at the time of the second incident. I have videos files, recorded by the car itself of both incidents as they are happening available. The body damage of the car is fully repaired but the car is otherwise available for inspection/data downloads.

What component or system failed or malfunctioned, and is it available for inspection upon request? The Dashboard and yes. How was your safety or the safety of others put at risk? car display has unexpectedly rebooted while I was driving, my display rebooted. It crashed when my passenger was attempting to read the release notes while I was driving. It was night, and after it rebooted, the part of the screen that shows the car and road flashed white, blinding me while driving. I lost the ability to signal or determine if it's signaling, no speed indicator no anything, not even a signal sound. I couldn't control the windshield wiper, when I attempted to turn on the emergency blinkers, I had no visual or audio confirmation that it was working. this lasted for 1-2 minutes. Has the problem been reproduced or confirmed by a dealer or independent service center? No as 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

First, the car was not in auto pilot mode or cruise control. The car was driven into the garage, 22 inches from the landing and put in park. The “P” was lit so it was in park when it suddenly lurched forward and hit the landing and the four way flasher came on. Damage has been repaired but was $2500. Per Tesla, the car was not at fault and the car functioned as intended but it was driver error. With all the safety features that this car has, why did it not sound a warning or apply brakes to prevent this from happening. I have read about hundreds of thousand’s of incidents of sudden unintentional acceleration but yet nothing has been done about it. There is another problem with phantom braking when the car suddenly stops if you use the cruise control. I do not use cruise control because of this problem. Tesla continues to add games and other nonsense but have done nothing to fix these problems. I reported this to the Minnesota Attorney Generals office and they suggested that I contact the nhtsa. Their response from Tesla was also that it was driver error and it was not, the car was in park.

In Feb. 2021 I purchased a new 2021 Tesla Model Y. In August I noticed a crack in the glass ceiling originating from the front edge of glass. We made an appt for 10/19 to have it replaced at the S. Seattle Tesla Service Ctr, assuming the repair would be covered under warranty. We brought the car in on Oct 19. The service rep inspected the crack and very quickly determined that the crack was a result of something hitting the ceiling such as a small rock. The rep's eagerness with her response suggested that she was familiar with this issue and was ready to deny warranty coverage. She told us we should make a claim against our auto insurance policy. We countered that we didn't believe anything had hit the ceiling, and even if it had, the glass should not have cracked that easily. Also, we also pointed out that in all the other cars we've owned we have never experienced rocks being spun up from the road hitting the ceiling. The rep still declined. We went ahead with the repair. We searched the internet for other Tesla owners whose ceiling glass had also cracked and found a number of postings on several forums of customers who had the same disappointing experience we had. It is evident that there is some kind of design flaw that results in the ceiling glass cracking easily. We inquired with a class action law firm who informed us that there is a provision in Tesla's standard warranty in which the consumer agrees not to enter into any class action lawsuits against Tesla and requires arbitration to settle disputes.We wanted to bring this issue to your attention attention because we believe Tesla is well aware of a design flaw that results in the cracking of their glass ceilings and is concealing their knowledge of the frequency of this problem.

We were driving roughly 80 mph on an open highway. Clear skies. No cruise control/autopilot engaged. Vehicle slammed on the brakes. Threw both occupants rapidly forward in our seats. Lucky no cars behind us.

Using autopilot on 405 freeway at approximately 60mph. When approaching stopped traffic, I initiated a lane change using the turn signal. Halfway through the lane change the car swerved back into the original lane and slammed on the brakes causing the car behind me to rear end the vehicle. Damage was minor. I reported the incident to tesla on October 17. The original response was to schedule a service appointment. The appointment was later cancelled after I received a message from Tesla legal regarding autopilot. My message to Tesla was deleted from my service history. Tesla autopilot, TACC and FSD are not safe to use on any roads. I have experienced dozens of phantom braking episodes in this car on all types of roads in clear conditions.

Driving on 2 lane highway at about 70mph with auto pilot enabled in left lane. There was a large truck on the right. No vehicles in front of the car. The truck on the right remained in its lane. The Tesla suddenly applied the brakes, dropping the speed to about 50 mph very quickly and unexpectedly. I disabled autopilot and pressed the accelerator to get back to the original speed. It almost seems like the auto pilot decided that the truck was in front of the Tesla when it was actually in a different lane. No accident or problems except for the shock of the car breaking suddenly.

Since delivery the vehicle has experienced several "phantom braking" incidents in situations where no threat was evident, including some in which braking was initiated on clear, straight highways with no other traffic anywhere in sight. The events are aggressive and result in immediate profound loss of speed, making the threat of a collision an issue.

On October 12th, 2021 my vehicle had multiple instances of phantom braking that occurred on highway 10 in California while traveling Eastbound with autopilot engaged. This was a trip in excess of 400 miles. Two of these instances occurred as my vehicle approached rainwater washes where metal barriers appear on both sides of the road ( see 33°38'10.5"N 115°05'01.6"W for an example ). The third instance occurred when a truck in the slow lane began drifting towards my lane slightly. In each of these three instances the car did a heavy braking at which time I quickly disengaged the autopilot by tapping the brake and speeding back up. Thankfully no accident but these three occurrence were scary. I reported phantom braking into the voice command database of the vehicle after each occurrence. According to a tesla representative these are saved.

Sudden acceleration while stopped. Car was stopped in the driveway of my home while waiting for the garage door to open. Suddenly the car bolted forward, crashed through the rising garage door and then through the side of the garage and into the front steps of my home. The car is equiped with auto pilot, but it was not engaged. While reviewing other incidents of this type on your website, I noticed that other people mentioned their Tesla's having the autopilot feature but I saw no mention of the Model Y. Although extensive damage happened to the car and my home, no one was injured. However if this had happened while at a stop light or at a crosswalk someone could have been killed or injured. My Insurance Co. did not seem interested in investigating this event, haven't heard back from Tesla.

Adaptive Cruise Control breaks hard for no apparent reason. If there had been any cars trailing close behind I could easily be rear-ended. Happens at least once every time I turn on cruise control. On a recent longer highway trip of about 90 miles it happened three times. One time on that trip it happened while passing under a bridge, did it pick up the lower speed from the bridge above? The other times it seemed to happen for no reason. All these times our hearts dropped (2 passengers in car). Note that I do not have full self driving, so I’m talking about adaptive cruise control being the problem.

I was driving in cruise control at the posted speed limit of 80mph. The conditions were dry and sunny. Without warning the car braked hard and decelerated from 80mph to 69mph in less than a second. The braking was so violent, my head snapped forward and I almost lost control of the car. This 'phantom' braking occurred other times but it was less sever. The unpredictable nature of the adaptive cruise control and emergency braking has prompted me to disable these so-called safety features.

I have consistently experienced “phantom braking” when using cruise control. (I do not use full driver assist). I drive frequently on two lane highways and the braking occurs seemingly randomly, sometimes even when no other vehicles are close enough for concern, but usually when a large truck is approaching on the opposite side. I don’t recall having the problem while driving on divided highways. Each time this has occurred I am startled by the warning beep and am in fear of a rear-end collision, so I have stopped using cruise control except on multi-lane, divided highways. I read about “phantom braking” in the Washington Post and was surprised that there were not more similar complaints.

UNKNOWN

At random times, without warning, cruise control changes from set speed (e.g. 70mph) to 45mph and vehicle immediately begins hard braking to achieve new set speed. Any cars following may not be able to react quickly enough to avoid a collision if the driver doesn't react quickly enough to command acceleration back to freeway speed. I sent multiple videos of this happening to Tesla's service department. Tesla virtual service has looked at vehicle's logs and says there's nothing wrong with the vehicle and that it must be in how the vehicle is interpreting fleet data and map data. Clearly a software bug not validating it's input for reasonableness. No audible warning and while the cruise set speed does change on the display, the deceleration happens simultaneously, so no actionable visual warning is given to prevent the uncommanded deceleration and one must react immediately.

On multiple occasions, I have experienced the "phantom breaking" problem when using either adaptive cruise control or the limited self driving feature on my Tesla. I've experienced the problem when driving in traffic (me in another lane, passing a larger vehicle) when the breaking system will activate and all kinds of warning sounds given by the vehicle. I've also experienced the problem when driving alone on the highway (no traffic in either direction), usually in daylight conditions, when the breaking system activates and alarms go off. Additionally, I've experienced the problem when cruise control is activated and a vehicle turns in front of me (either in the same direction or sometimes when turning on a cross street), it's just strange for this to happen when the vehicle is about 1/4th of a mile (or more) in front of me and the turning action of the other vehicle will be complete without causing any concern for my vehicle. This has happened 30-50 times since I purchased the vehicle in late September 2021, so I don't have specific dates for each of these occurrences but it happens so frequently that I pretty much don't use the cruise control or self driving function anymore.

The contact owns a 2021 Tesla Model Y. The contact stated that while driving at various speeds, the vehicle suddenly experienced “Phantom Braking”. There was no warning light illuminated. The contact would depress the accelerator excessively to avoid a crash whenever the failure occurred. The contact had informed the manufacturer of the failure, however the vehicle was not diagnosed or repaired. The approximate failure mileage was 1,000.

We are familiar with managing the controls which, in my experience, operate similarly to other vehicles with similar safety and driver-assist features. Unfortunately, in regards to the effectiveness and ease of operation of the TACC, our Tesla is by far the worst of the 5 vehicles with which I'm familiar. The experience of managing TACC with oncoming traffic is frustrating, distracting and sometimes unsafe. Autosteer, because it builds on TACC's systems, is similarly deficient although the features it provides would be extremely welcome when TACC is improved. Nearly every oncoming large truck (including many pickup trucks) caused TACC to brake the car TACC assisted braking was inconsistent. Sometimes an immediate, slight reduction in speed (5-10mph) and other times it was an immediate major reduction in speed, on the order of half-speed within 3 - 5 seconds. It was common to have the car brake from 65 - 35 for no other reason than a large, oncoming truck. After 3 or 4 occurrences of heavy braking, I would turn off TACC and manually maintain speed with the accelerator. This in itself is fatiguing and I would eventually resort to a system in which I would disengage TACC when approached by a truck, usually 200 - 300 yds away and then reengage when traffic was clear Heavy braking was severe enough that, if a there had been a closely following/unaware car, it would have rear-ended our vehicle TACC (and Autosteer) seem "happiest" when following other vehicles and, even on 2 lane highways, phantom braking was much less frequent A standard cruise control (no Traffic Assist except for Following Distance) is not available but would be welcome Summary: On the Interstate Highway system TAAC works reasonably well but could use improvement. On 2 lane highways TACC is more work and less safe than operating the vehicle manually and, as a system designed to reduce driver workload and improve safety, it fails.

The vehicle sometimes brakes dangerously hard at highway speeds, nearly causing the vehicle behind me to nearly rear-end me.

Driving across the country in Model Y. Passed semi in left lane, and when merging back into right hand lane vehicle applied full brakes dropping the vehicle speed from 80mph to 60mph, right in front of semi. I was forced to take over and accelerate to avoid serious rear end collision. It wasn’t just the one time, vehicle continued to perform aggressive braking actions many times. Autopilot was unusable for majority of trip. Tesla needs to make autopilot able to be disabled, and standard cruise control possible. Tesla vision is not safe, and is a major liability. It’s very clear Tesla vision is an attempt to remove radar to get around supply chain issues, at the cost of consumer safety.

On September 26, on our first long distance trip with our just delivered (9/17/2021) Tesla Model Y, during daylight nice weather driving with Adaptive Cruise Control switched “On”, on at least 6 occasions (strait roads, freeway and non-freeway driving), the car suddenly, without any reason, violently slammed on the brakes. These events are hair raising for me and passengers, let alone for a driver behind me. If he/she does not pay attention at that very moment, the result could even be disastrous. I would never have expected such a serious safety issue with a Tesla. Suffice to say that this is absolutely unacceptable to me. When checking out the web, many people reported similar issues with their Model Y vehicle. I had the car checked-out at the Tesla Lynnwood, WA, Service Center on September 30, 2021, and when picking-up the car I was informed that no anomalies had been found. At later dates, similar emergency braking occurred without any reason, while driving with Adaptive Cruise Control. Obviously, I do not trust this Cruise Control system one bit anymore, and no longer use it. I have written a letter to Tesla (11/12/2021) requesting a time frame when a solution can be expected, but so far, I have not received any word from them. I sincerely feel that Tesla should temporarily disable this Adaptive Cruise Control feature on ALL Model Y vehicles currently on the road and those still to be delivered (to unaware new owners), until this serious safety issue has been resolved.

Phantom braking has occurred multiple times randomly when autopilot and cruise control are activated.