Automatic Emergency Braking problems of the 2022 Tesla Model Y - part 1

The autopilot/fsd computer (driver-assistance ecu) on my 2021 Model Y (hw3) began failing intermittently on August 2, 2026, days after installing a software update -fsd v14 "lite" branch. The component is in the vehicle and available for inspection. While driving at highway speed in high ambient temperatures (112–125°f), the system repeatedly disengaged with "cruise control unavailable" (alert di_a175) and "system error — take over immediately" warnings, and later alert app_w46u on fsd engagement. Failures included: fsd and autosteer aborting within seconds of engagement or disappearing from the menu entirely; complete loss of driving visualizations (no lane lines or vehicle overlays); rear camera blacking out; loss of speed-limit recognition and automatic turn-signal cancel. Both fsd and autosteer beta failed identically, indicating the fault is in the shared autopilot computer/camera pipeline, not one feature. Because the same camera/compute stack supports automatic emergency braking, forward-collision warning, and blind-spot warning, the status of those safety systems during the failures is unknown — I had to complete long desert highway stretches fully manually, with repeated unrequested hand-backs of control creating a sudden-takeover risk. The fault is thermal-load related and intermittent: it recurred at high ambient temperatures, sometimes recovered after a rest or power-off reset, but on August 4 one full power-off reset at 88°f ambient failed to restore the system (it later self-recovered), suggesting progressive hardware degradation rather than ambient heat alone. Not yet reproduced by a service center: a Tesla service appointment is scheduled for August 13, 2026, and a service request with fault codes was filed in-app while the faults were active so remote diagnostics could capture them. No inspection yet by the manufacturer, police, or insurance. Public owner reports describe similar autopilot-computer thermal failures on hw3 vehicle.

Tesla released a new version of fsd: 2026. 20. 6. 11 v14 lite for my 2022 Model Y long range. I installed it overnight and the next morning, several systems become intermittent. The backup camera stopped working immediately, and fsd would drop out, with the message "take control immediately". I would then lose traffic visualization and other advanced features. Eventually the system would recover and start the cycle all over again. Several times per drive. I took the car to the dealer and they diagnosed it as a failed hw3 computer. The cost to repair it was $2,939 out of pocket since my car was 2 months out of warranty. The car was 100% functional before the v14 lite update. The dealership denied the problem was related to the update, but the internet now has numerous instances of this problem, and attribute it to the computer running much hotter under this new update, causing components to fail. Our update was installed while the car was in our garage at a temperature in the 70’sf and immediately caused the computer failure before the car even left the garage. I requested and was given the failed computer in case any independent investigation is needed.

I was driving at approximately 30-35 mph on a 30 mph residential road with my son in the front passenger seat. My vehicle unexpectedly collided with a parked, unoccupied car on the right side of the road, impact occurring between my front passenger side and the rear driver side of the parked vehicle. Following the initial collision, the vehicle continued past a small tree, mounted the sidewalk, and struck a second parked car before I was able to manually bring it to a stop 2–3 houses further down near an intersection. Throughout this sequence—with the vehicle traveling at ~35 mph—neither the automatic emergency braking (aeb) activated nor did any airbags deploy. Fortunately, neither my son nor I sustained catastrophic injuries, though my chest struck the steering wheel during the impact, causing ongoing pain my and mental trauma for my son. I am currently receiving medical advise. Given the speed and sequence of impacts, it is terrifying that the vehicle’s primary safety systems failed to engage before, during, or after the collision. I am seeking a thorough technical investigation into why automatic emergency braking and airbag deployment failed in this scenario with Tesla Model Y.

**incident report — Tesla Model Y safety system failure** the subject vehicle, a Tesla Model Y equipped with full self-driving (fsd) technology and advanced safety features, was involved in a collision at an estimated impact speed of 40–45 mph. The vehicle's onboard recording system captured the incident and clearly documents the impact dynamics, vehicle speed at impact, and the contributing actions of the other party involved. **incident details:** - **impact location:** left front side of vehicle - **impact speed:** 40–45 mph - **damage assessment:** vehicle declared total loss by insurance - **recorded evidence:** onboard system footage available **safety system failures:** despite the severity of the impact and speed involved, the following safety systems failed to activate: - emergency braking system did not engage - forward collision warning failed - seatbelt pre-tensioning/locking mechanism did not activate - airbag deployment systems failed (front, side, curtain, and knee airbags) **concern:** the vehicle's advanced safety features—which are primary design components marketed for collision mitigation—did not function as designed or expected. Given the impact speed and severity, these safety systems should have either mitigated the collision or deployed to protect occupants. The failure of multiple redundant safety systems raises questions regarding the reliability and function of these critical systems at the time of impact. **available evidence:** - onboard system footage (speed, impact angle, timing) - insurance total loss assessment - medical records (if applicable) - vehicle service history.

I am writing to formally raise a serious concern regarding the functionality of Tesla’s full self-driving (fsd) system. On may 11th, while the vehicle was operating under fsd, I experienced an unexpected disengagement of the system, which then reengaged on its own without any input from me. This erratic behavior caused the vehicle to hit the garage door and resulted in a crash.

The vehicle was delivered with a critical safety defect in the braking system and inoperable safety software (gps/fsd/navigation). Upon further inspection by the dealer's own technician, it was confirmed that the vehicle had 'extremely poor brake feel' and 'extreme rust build up' on all pads and rotors, which violated Tesla’s 6mm minimum safety standard for used vehicles. Additionally, a physically damaged windshield harness caused the failure of gps and fsd features. These defects posed a significant safety risk to myself and my family during operation. The dealer has documented and confirmed these safety issues but is now refusing a buyback and is retaliating with storage fees for my rejection of the unsafe product. No warning lights appeared prior to the technician's discovery of the brake defects.

Around 02/10/2026, all of adas functions of my 2022 Tesla Model Y has suddenly stopped working, and the rearview was just black. On 02/27/2026, Tesla service diagnosed the car and tole me that the car computer should be replaced and its total repair cost would be about $3,200. My car's mileage was 51,000 at the onset of the problem, so just passed the standard 50k warranty. My car has total loss of rearview camera (fmvss 111 violation) and loss of active safety systems (aeb/fcw), but Tesla refused to repair a federally mandated safety defect if I don't pay the full repair cost.

Incident summary: car computer (hw3) suffered internal hardware failure on 12/17/25 following software update 2025. 44. 3. While the media screen and rearview camera functioned, the autopilot board (apb) was "mia. " Tesla randolph (invoice #3000s0015357298) confirmed the internal failure and replaced the unit. Safety risk: failure disabled safety-critical adas: automatic emergency braking (aeb) and forward collision warning. Driving visualizations were severely compromised; the vehicle failed to detect pedestrians or lane markings while in motion, creating an immediate collision risk. The car’s active safety "intelligence" was essentially blind despite the camera feed being visible on the screen. Inspection & contradictions: Tesla service confirmed the "internal failure" (12/19-12/23). Note: the service manager verbally claimed "no codes," but the official invoice explicitly states technicians "found multiple alerts present. " part was retained by Tesla. Warning symptoms: failure followed a software reboot loop. Symptoms (mia board/power cycle failure) match recall 25v-002. Vehicle had only 36,289 miles. Reporting as potential hw3 defect expansion.

On October 8, 2025, while using full self-driving (fsd) to drive to a hospital in oak park, illinois, the vehicle experienced sudden unintended acceleration during the disengagement of fsd. As the vehicle approached the hospital area, I initiated disengagement of fsd to manually enter the parking area. During—or immediately after—the disengagement, the vehicle suddenly accelerated at full power without warning, causing an immediate loss of control and a collision with a nearby fixed structure. No system warnings or alerts were issued prior to the event, and the acceleration was so abrupt that manual intervention was not possible. This occurred in a low-speed, street-level environment where no acceleration was intended or expected and does not correspond to any normal driver input. Based on review of preliminary incident data provided by Tesla, there appear to be irregularities during the fsd-to-manual control transition, including missing or invalid input values, gaps in accelerator/brake/steering signals, and speed readings inconsistent with the crash severity. These indicators suggest potential instability in the real-time control system during disengagement. This report is submitted due to concern that sudden unintended acceleration during fsd disengagement may represent a safety defect with potential risk to drivers and the public.

While driving at approximately 25 mph on a local street in seattle, wa, my Tesla suddenly engaged the brakes without any apparent reason. The vehicle was not in autopilot or full self-driving mode, and my foot was actively pressing the accelerator pedal at the time. The braking was abrupt and forceful, causing a sudden deceleration. The weather was clear with good lighting. There were no obstacles, vehicles, or road hazards in my path that could have triggered the braking. The unexpected stop was shocking and could have led to a rear-end collision, as there were vehicles behind me.

Phantom braking event on highway. Going about 65 miles an hour. It slammed on the brakes. Car is on latest software. I have the video clip whet it shows me trying to get the car under control.

I was driving the car on supervised self drive and going home around 9 pm. When I reached my house I tapped the break to disengage the fsd and take over so that I can pull into our driveway. After coming to a stop the car all of a sudden just took off on its own at almost 60 mph on a residential street. I was repeatedly pressing on the brake to try to control the car. But it seemed like the car had a mind of its own and was not responding to me at all. Approximately 8 seconds (based on Tesla dashcam recordings) later after travelling a distance of approximately 700 feet the car hit 2 parked cars on the street, which eventually activated the brake and brought the car to a stop at the front yard of a house across the street from where the parked cars were hit.

The vehicle suddenly starts to slow and slams on the brakes without warning when there is no danger.

The fsd is not fully matured and I have tried multiple times and all times and the experience is weird and very hard braking and no control on parking lots. So not sure why this is called fully self driving capability by Tesla? I have paid 12k for this capability in my car and unfortunately it's not fully functional. Hope some safety precautions will be taken for the safety of the drivers and passengers. Happy to provide more details if needed. Thank you.

Two incidents: 1) non-accident: my wife was slowing to make a right turn at a stop light and the steering locked up for about 3 seconds, where she wasn't able to regain manual steering control. We did not have full self-driving mode at the time. Luckily, she was only going about 10 mph, and was able to brake before running into oncoming traffic. 2) accident: our son was driving on a country road, along a section with a slight curve. We had a free trial for full self-driving mode during the previous month, but it ended two weeks before the accident, so he could not have had it in self-driving mode. It appears that he didn't make the curve, but as evidenced by a single long tire skid mark, continued almost perfectly straight, across the oncoming lane, and ran into a redwood tree. The car rolled and ended up upside down, against the bank back on the right side of the road, with the lithium batteries on fire. Our son and his passenger sustained severe injuries and neither has a memory of what caused the accident. Naturally we suspect the possibility that the steering locked up again. But it also seems likely that the aeb and abs were not functioning correctly, as if they were, there should have been several short skid marks for the tires on both sides of the car, rather than only a single long skid mark. Additionally, there's no shoulder on that road, and there is a clump of bushes that come very close to the white line, so it's possible that a steering auto-correct initiated the incident. We have not yet been able to recover edr or log data from the vehicle.

I was performing a 3-point turn on a residential street. While reversing during the turn the automatic emergency braking enabled and slammed on the brakes, bringing the car to a complete halt instantly. This caused my head to hit the headrest with enough force that I have headaches and brain fog the next day, indicating a concussion. I was 10 feet from the nearest parked vehicle when reversing; the aeb kicked in erroneously. This is not the first time that Tesla's aeb has erroneously and dangerously engaged while I was driving.

On November 12, 2023, approximately 3pm, my family and I were traveling eastbound on miramar road, near camino santa fe road, san diego, when we experienced an immediate and sudden braking of our vehicle (2022 Tesla, Model Y), for no apparent reason. There were no warning lights or symptoms that would have exhibited any kind of problem with the vehicle. This sudden braking caused my wife, the driver, to panic and swerve. We were traveling at the posted road speed of about 50mph. Fortunately, there was no traffic and no other vehicles in the vicinity or there might have been an accident. We have not yet reported this incident to Tesla, the police, or anyone else. I am conducting my initial research. Coincidentally, my daughter just experienced a similar incident this morning in her 2017 Tesla, model 3. She will file her own report. After hearing of the problem happening to my daughter I decided we need to file immediate reports and contact Tesla today.

I was driving south bound on hwy90 at about 78mph using navigate on autopilot. Without warning the car swerved into a left turn lane and then slammed on the brakes when the turn lane came to an end. This caused a number of personal belongings to be damaged. Thus happened as I was on my way home from a service center visit that stated the autopilot systems were all functioning correctly. Tesla was notified immediately a d has not responded to my complaints.

While driving at night with the cruise control on, the emergency braking system engaged. It appeared that the road surface went from dark to a lighter color.

The vehicle has suddenly applied automatic emergency braking on numerous occasions when there is no obstruction in the road or potential emergency situation. This often occurs multiple times per trip on longer trips (multiple hours of driving). It seems to happen regardless of whether autopilot is activated or just cruise control. It seems much more common on hot, sunny days when highway mirages are present but it occasionally happens due to some shadow conditions. None of these situations have resulted in compromised safety but that might have been different if there had been a vehicles immediately behind us. The brakes are applied without warning and the vehicle decelerates rapidly.

There was an update last night on my Tesla Model Y. I've noticed two episodes of phantom breaking after this update this morning when I was driving to work. There was a truck in the next lane but the car hit the brakes all of a sudden on the highway when the autopilot was on active. It was at a curve on the highway. I'm assuming the car thought that the truck was moving into my lane leading to sudden activation of brakes. This could have been dangerous. Fortunately there was nobody behind me and we were safe.

Many occurrences of phantom braking have occurred since I purchased the vehicle several months ago. I was driving on I-5 in California with the cruise control set at 70mph, then changed lanes from left lane to right lane with about 5-6 car links from the semi truck to the rear in the right lane. The emergency braking feature engaged with no vehicles in front of me in either lane for at least 500 yards. The semi truck locked up its breaks to avoid rear ending me. I applied the accelerator as quickly as possible and when I did the semi was approximately 3 feet from crashing into the rear of my vehicle.

Driver seats heat up on its own. Windows go up and down on its own. Front collision sensor beeps with no cars nearby. Wipers issues. Back up camera issues.

During auto pilot or cruise control the vehicle suddenly brakes causing a sudden deceleration with no obstacles or obstruction! phantom braking! happens several times during a trip.

When I drive a Tesla Model Y under self-driving mode at night inside yellowstone np, there is another car on the opposite side with a high beam turned on, and just near that car there is a bison on the road, the self-driving computer fails to detect the bison in the beginning, and too late to do emergency break, the car hit the bison after passing that car. The bison died but driver is safe, the front right head light part and right repeater camera was missing. It's very hard to see the bison in the dark when the other car turns on the high beam, for both humans and cameras, the self-driving without radar or lidar is not able to detect the obstacle at the blind spot. I want to report this accident as a reference, the car's self-driving software helped me avoid serious injury. The Tesla fsd(full self-driving or autopilot) is great but I still hope there's more sensor such as radar or lidar can be added to the car for better night vision self-driving. The car deemed a total loss and there is a video from the front dash cam record how this accident happen.

When using Tesla's cruise-control, traffic aware cruise control or enhanced auto-pilot the vehicle severely brakes without any reason. This happens every time the vehicle is taken on the highway. It is sometimes reproducible because it happens every single time at specific geographic locations. Most often it is not reproducible. On the highways it has put me in danger more than once. The vehicle would brake while going at 75mph and slow down rapidly all the way down to 45mph. Other vehicles following at safe distances have to veer away quickly or slam on their brakes to avoid an accident. Everyone inside the car experience a whiplash from their seat belts. I opened a service ticket with Tesla. I was told that they ran a remote diagnostics and found no hardware issue in the car. The ticket was closed by Tesla after they pointed out that enhanced auto pilot is a beta version. I gave them very specific examples of how to reproduce this issue. No on came to drive the car before closing the ticket.

Phantom braking issue at highway speeds with autopilot engaged. The car will harshly start braking suddenly on highway to a near complete stop.

My wife and I were on the highway 44 in the Model Y travelling at around 79 miles an hour. There was no other vehicles close to us or in front of us. This was about 1:30 pm and there was no clouds in the sky. The autopilot had been engaged and for no reason, the car started to emergency brake. This was very scary since it was very abrupt and if another vehicle would have been following too close we would have been hit from behind causing damage and or causing death to us both. The vehicle has done this numerous times since we have owned it. It was reported to Tesla and I had a service scheduled to have them look at it. They claimed they looked at the logs and did not see any issues, which I find hard to believe, I asked for the logs and they refused to provide them to me. They claimed I would not understand them, although I explained that I am engineer and I have 25 years of experience with such things. Trust me, I can read a safety log! they claim they will fix with a software update, but when asked for an ecd or eta they refused to give me that information.

While driving between Lincoln nebraska and denver using the driver assist system in my Tesla the car braked for no apparent reason. This occurred 3 times in my 8 hour drive. I would be driving at 80 miles an hour with nothing around on a sunny day and all of a sudden the vehicle would hard brake.

Since I received this awful vehicle it has never properly identified emergency vehicles. Sometimes it confuses neon/led signs with emergency lights and smashes on the brake for emergency vehicles that aren't there. Other times it slams on the brakes on the highway when behind an emergency vehicle and the reflective tape is lit up from my own headlights bouncing on the awfully hard and cheap suspension on this 'performance' vehicle. Lately I've captured video of the car completely failing to see a fire truck right in front of it for at least 1 minute straight with the lights and sirens on. This is unacceptable. Tesla not only wants me and my family dead, they don't care about the lives of our brave firefighters, emts and police officers. Then don't care about you either. . Read more...

Within the last week, while driving cross-country on interstate highways at speeds of 65-75 mph, car repeatedly (estimate 10-15 times over 1800 miles) experienced “phantom braking,” automatically engaging the brakes in the absence of any sort of hazard whatsoever (no cars or other objects nearby, fortunately; clear, sunny weather). This occurred when full self-driving was engaged and also when cruise control without fsd was engaged.

The car experiences phantom braking very often. A 3-1/2 hour drive this weekend probably happened 8-10 times. Sometimes brakes very hard at speeds of around 70 mph.

Same issue I've been reporting several months. This morning I downloaded yet another software update, got in my car, drove to chick-fil-a on a Sunday because Tesla has not fixed this fatal braking bug on the highway for a non-existent round-a-bout so I use that for the car to navigate to. The car tries to get on the state road instead of the highway so I cancel and take over and drive onto the highway/expressway myself. After a couple miles the fsd finally takes over in a 70mph zone and reduces my speed to 45mph and stays at 45mph while passing several 70mph signs it clearly sees in its own 'Tesla vision' on the map in ar(augmented reality). I cancel and speed back up to 70 before the next overpass where the car puts its hazards on, pulls into the slow lane, says it's executing a round-a-bout. Comes to a complete stop on the highway with hazards while in the travel lane, cars whipping past me on the driver side. Then the car starts yelling at me to grab the wheel which I've never let go of during this entire event so I shake the wheel vigorously left and right and the car does not process that I'm holding the wheel (this is so Tesla can commit fraud when they blame it on the driver and buy more time because NHTSA rules aren't up-to-date on software patches and NHTSA needs to just recall all fsd because Tesla has displayed inability to repair) then to add the cherry on top while the car is stopped on the highway, yelling at me to pay attention while I'm shaking the wheel; I press the door open button and my door opens into the fast lane; allowing the (inattentive driver) to unconsciously fall onto the highway in the fast lane at 0mph while not in drive. I have been reporting these vulnerabilities for months specifically the bluetooth radio vulnerability that was just proven in a hacking competition where Tesla awarded a new car and $350,000 for a vulnerability I was reporting 6 months before. Https://drive. Google. Com/file/d/11kurzkffs4axs21pqyd_urdzlchtuozp/view.

On March 23rd and most recently the car while on cruise control with no cars infront of me emergency (phantom breaking).

This isn't another case of the auto pilot being engaged and the driver not paying attention. I was driving, in the rain, on a normal road surface, with both hands on the wheel. The car attempted to steer away and out of my lane when there wasn't an obstacle or any other hazard near me. My hand went from the 10 and 2 o'clock positions to the 11 and 3 o'clock position before it straightened back out. Because of this abrupt movement that the car made, the rear end of the car lost traction and spun around on me before the car came to a stop. Fortunately, no one else was hit during this accident. By looking at the dashcam video, the car does show brakes were applied before spinning out of control but this wasn't by my input. I feel that the car made a descision for me that I had no control of. The car was not on auto pilot but yet still steered for me. Accident report indicates no issues with road surface, no speeding, and no citations.