Vehicle Speed Control Problems of Tesla Model 3 - part 1

On xxx, while full self-driving (supervised) was engaged, my 2022 Tesla Model 3 rwd abruptly decelerated without any visible vehicle, pedestrian, debris, or other obstacle requiring braking. Based on my best recollection, this occurred on approximately five separate occasions in clear daylight with clean cameras. On xxx, the first event occurred near xxx while traveling from [xxx] toward the [xxx]/[xxx] area. I took manual control for about 30 minutes. After I re-engaged fsd, a second event occurred and included approximately three rapid braking pulses. The occupants lunged forward during both episodes. On xxx, the drive from [xxx] to the ukiah costco was normal. On the return toward [xxx], fsd suddenly braked hard at approximately 63 mph and reduced the vehicle's speed by about 25 mph, to approximately 38 mph. Family members and friends in the vehicle were startled and moved forward. Later that day, there were two additional unexpected braking episodes while traveling from xxx toward xxx. I used accelerator input to override the unwanted braking. The unexpected highway-speed deceleration created a risk of being struck from behind and made the system unpredictable to supervise. No crash, fire, injury, or property damage occurred. I do not recall a warning message before the braking. The vehicle has not been inspected or diagnosed for this issue and is available for inspection upon request. As of xxx, the vehicle reports Tesla software 2026. 20. 3 and fsd (supervised) v12. 6. 4; it has hardware 3. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

See all problems of the 2022 Tesla Model 3 🔎.

On July 11 at approximately 6:47 a. M. , I was operating my Tesla Model 3 on interstate 65 in hart county, kentucky, with full self-driving (fsd) engaged during normal highway travel. Approximately one hour earlier, I had departed a highway rest area after sleeping from the previous day’s travel. Rain developed during the trip, but I observed adequate visibility, apparent roadway traction, and I was not impaired. I was traveling in the far-right lane of a three-lane interstate. The posted speed limit was approximately 70 mph; however, fsd limited the vehicle to approximately 65 mph and displayed warnings indicating that the higher speed was unavailable. While fsd remained engaged, the system initiated a lane change from the far-right lane into the center lane. After entering the center lane, the vehicle began displaying repeated warning messages and fsd disengaged multiple times. I attempted to locate settings related to the warnings on the touchscreen but could not identify an available adjustment. During the third disengagement, I perceived that the vehicle continued braking without releasing while steering resistance increased significantly. The steering wheel then rotated abruptly, and I was unable to regain normal directional control before the vehicle departed its intended travel path and struck a concrete median. The collision caused personal injuries and substantial vehicle damage. I have not been able to reproduce the condition. The incident was investigated by the kentucky state police. Based on the sequence of repeated fsd warnings, disengagements, continued braking, and abrupt steering behavior, I believe this event warrants investigation. I request that NHTSA review the vehicle’s full self-driving logs, telemetry, event data recorder (edr) data, steering and braking commands, diagnostic records, and software history to determine whether a vehicle or software malfunction contributed to the collision. Almost like someone had control, into the wall -km.

See all problems of the 2020 Tesla Model 3 🔎.

While turning right, I slowed down and put on my turn lights. The vehicle accelerated all of a sudden and did a sharp right. There was a vehicle in front of me in the opposite direction and my car turned very sharply to avoid it. The accelerator pedal was fully pressed down and for that fraction of a second, it didn’t allow me to control the speed.

See all problems of the 2024 Tesla Model 3 🔎.

My wife had a collission on June 25th at 2 30pm cst while she was parking her vehicle in her office parking spot. The car suddenty sped and hit a tree. We suspect it be a misfire in Tesla.

The vehicle was purchased pre-owned directly from Tesla. On the day of pickup and five days later, while operating on full self-driving (fsd), the vehicle phantom-braked abruptly and then dangerously accelerated through a solid red light into cross-traffic intersections. The driver had to forcefully override the vehicle to prevent a crash. Tesla service center was notified but dismissed the issue, performing only a camera recalibration and charging a fee. Following the service appointment, the red-light running behavior stopped, but the vehicle continues to suffer from aggressive, sudden phantom braking multiple times on every single trip, creating a severe and continuous risk of a rear-end collision on public highways.

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-I was driving down into an indoor basement level garage very slowly as there is a steep incline. It descends from street level to basement level within a distance of approximately 30 to 35 ft. At the end of the incline is a sharp curve to the right, followed by a sharp left turn to proceed straight. -while on the incline, the car was slowing to a stop. I gently tapped the accelerator to keep it moving. -the car suddenly lunged forward, rapidly accelerating. The acceleration was not consistent with the amount of accelerator input I applied. -I quickly steered right to avoid hitting the wall, then immediately steered left to avoid hitting parked cars and garage columns. -I braked as hard as possible, pumping it. The brake pedal was stiff. The car kept moving forward despite my efforts and did not stop until I crashed into a parked car at the end of the garage. -my son was in the front passenger seat. We both had seatbelts on. Other than whiplash, there were no major injuries. -there were no warnings, messages or any indications that a problem was present prior to the incident. -there was no one in the parked vehicle that was struck and no other people in the garage. -my cell phone automatically alerted emergency services. The police responded, and I reported the incident.

The forward-facing camera and autopilot computer system on my 2021 Tesla Model 3 has failed. The dashboard first showed intermittent warnings that "automatic emergency braking is currently unavailable" and "adaptive headlight features are unavailable. " over several weeks the problem worsened from intermittent to constant, and the vehicle progressively lost its forward road visualization and all active safety features. Using the vehicle's service mode diagnostics, the autopilot computer's primary (a) processing node reports a "critical" status. The fault log records repeated alerts including dasmia (driver-assistance system not responding), aebfault (automatic emergency braking fault), and fisheyecaminitfault and fisheyecamerastreamexit (forward camera initialization and stream failures). The cameras themselves are physically clean and unobstructed. Safety risk: the failure disables automatic emergency braking and forward collision avoidance, lane-keeping/driver assistance, and the adaptive auto high-beam headlights. Aeb is a critical crash-avoidance system; losing it leaves the vehicle unable to brake automatically for an imminent collision, and the loss of adaptive headlights reduces nighttime visibility. A Tesla service center inspected the vehicle, confirmed the diagnosis, and determined the autopilot computer — a sealed, solid-state control unit — had failed and required full replacement at approximately $3,400. The vehicle is well under 50,000 miles. This failure appears consistent with the same car-computer power-component shorting failure for which Tesla issued a recall on its newer model-year vehicles. The vehicle and the failed component are available for inspection on request. The vehicle has not been inspected by police or insurance.

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The contact owns a 2019 Tesla Model 3. The contact stated that while the vehicle was stopped at a residential gate, the vehicle unexpectedly accelerated. There was no warning light illuminated. The vehicle was towed to a private residence. No warning light was illuminated. The vehicle was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 80,000.

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When using cruise control, there has been 4 times that the car has engaged in “phantom braking”. We were driving on highways going the posted speed limit of 70 mph, when the car suddenly slammed on the brakes and decelerated to less than 30 mph – all four times we were thankfully not being closely followed by another vehicle or we would’ve had a devastating crash. One time when we looked at the screen, it showed the outline of a person in the median but there was no person/ other obstacle at all. We have reported this to the Tesla service center and they said it is a known issue, and what we have to do is just click the scroll bar and report it so that the engineers can mark the timestamp and collect data so that some patches can be sent over the air/ uploaded at a future date. Nothing has been done to fix the issue and we feel dismissed about our concerns about our family’s safety, and the safety of drivers around us.

I purchased the full self-driving (fsd) package for approximately $10,000 on my 2022 Tesla Model 3 long range awd. Tesla marketed fsd as a feature that would enable autonomous driving capabilities including navigate on autopilot, auto lane change, autopark, summon, and city street driving - all to be delivered via software updates. Tesla has since confirmed my vehicle's hw3 (hardware 3. 0) computer cannot support fsd as advertised. There is no hardware upgrade path. The fsd transfer program that allowed owners to move their purchase to a new vehicle ended March 31, 2026 with no accommodation for affected owners. The system regularly fails to perform as advertised. It requires constant human supervision despite being sold as "full self-driving. " I have sent three formal complaints to Tesla's executive team (may 7, 8, and 12, 2026) with zero response. Tesla's own support chatbot confirmed I am not eligible for fsd transfer.

Tesla full self-driving (supervised) repeatedly ignored the “avoid toll roads” navigation setting and attempted last-second lane changes into express toll lanes at freeway speeds. This has occurred approximately 10 times. I was repeatedly forced to take over steering immediately to avoid entering the toll lane, creating a serious safety risk due to sudden maneuvers in heavy traffic. On several occasions, I could not safely intervene before the lane change was completed. Tesla service center inspected the vehicle, found no hardware or camera faults, and stated the behavior appears to be software-related.

See all problems of the 2025 Tesla Model 3 🔎.

On February 5, 2026, at 12:21 pm pst, my 2026 Tesla Model 3 (hardware 4) collided with a 5-inch wooden pillar while using the autopark feature. The system failed to provide any audio chimes or visual warnings prior to the impact. I officially requested the driving logs from Tesla to investigate the cause of this failure, but Tesla refused to provide any logs or data. Furthermore, Tesla service center technicians insisted there were no hardware defects, effectively confirming that the collision was caused by a software/algorithmic failure of the Tesla vision system to detect a stationary vertical object. Despite Tesla’s claim that the vehicle is "operating as designed," the system's inability to recognize common infrastructure and its failure to warn the driver constitutes a severe safety risk. This defect must be investigated to ensure the safety of the hardware 4 autonomous platform, as the lack of proximity alerts could lead to far more serious accidents involving pedestrians or other obstacles.

Screen is black and no app access. No power to accelerate.

The newer versions of fsd do not allow driver control of the max speed. The current versions allow you to set a maximum speed with a scroll wheel on the steering wheel.

Component/system that failed: Tesla full self-driving (supervised) software version 14. X (2025. 38. X and later). The issue is software-only and remains installed on any vehicle updated to v14. Description of safety defect: fsd v14 deliberately removes the driver’s ability to set or adjust maximum speed offset using the right scroll wheel (feature present in all prior versions including my current v13. 2. 9). As a result, the system routinely exceeds posted speed limits by 5–20 mph with no way for the supervised driver to correct it short of fully disengaging fsd. The vehicle ignores speed-limit signs, relies on inaccurate map data, and follows surrounding traffic speed instead of the legal limit, even in school zones, construction zones, residential areas, and adverse weather. This significantly increases risk of collision, injury, and traffic citations. Reproduced/confirmed: widely reproduced by thousands of owners on Tesla forums, reddit, and x immediately after v14 rollout in late 2025. I have chosen to remain on v13. 2. 9 to avoid this exact defect. Inspected by manufacturer or others: no in-person inspection required; Tesla has full remote log access. Multiple owners have submitted in-car bug reports. Warning lamps/messages: none. The speed-offset control is simply grayed out and non-functional by design in v14. Vehicle available for inspection upon request.

The vehicle’s brakes did not work, automatic emergency brakes and collision warning both did not work. I pressed on the brake for about 5 seconds but the brakes did not work, resulting in a collision with the car in front. Everything is available for inspection if needed. Both my safety and the driver of the vehicle in front of me was at risk. The problem has not been confirmed yet. The vehicle is currently at a shop, waiting inspection. There were no warning lamps, messages, or symptoms.

In the new Tesla update to full self drive they removed the ability to adjust the speed control while using fsd yet state "note: you are responsible for the speed and control of your vehicle at all times, whether fsd (supervised) is enabled or not. ".

Full self drive 14. 1 removes the max speed setting that allows drivers to control the speed of the vehicle while under computer control, leaving no way to prevent the car from speeding when the speed profiles choose to drive over 28+ mph over the speed limit. The lack of ability to control the speed of the system is fundamentally unsafe by design.

The center display (vehicle pad) on my 2018 Tesla Model 3 went completely blank while driving. This eliminated access to all vital driving information including the speedometer, gear selection, and safety indicators. Safety concern: without visible speed data and wipers the vehicle cannot be operated safely or legally. I attempted to reboot the system and power cycle the vehicle but the screen still failed.

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My family and I were in my Tesla Model 3 2022 and heading from charlotte to orlando on [xxx]. The car was in full self-drive (fsd) mode while commuting through daytona beach. The rain was heavy in the area. While driving in daytona beach, fsd caused the car to change lanes and go to a lane that had standing rain puddles on [xxx]. After fsd caused the lane change, the car immediately hydroplaned out of control. The car's short clearance from it's bottom and the ground which traps water that exacerbates hydroplaning, along with its generative breaking feature made matters worse and uncontrollable. The car spun into the median three times and settled in the middle of danger interstate. The car is totalled. My family and I require medical attention and counseling due to the trauma. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

Repeatedly and randomly, with cruise control (not fsd) engaged, the car would brake, sometimes aggressively. The last time, it braked so hard the tires or brakes squealed and the car swerved slightly before I was able to regain control. This was on the freeway (in colorado, if I remember correctly) while I was cruising at 70 or 75 mph. I decided that that was the last time I would use cruise control; it was just not safe. I had an appointment on October 22 to take the car in for service. But then a friend told me this was called "phantom braking" and that there was no fix. A friend suggested that I contact the NHTSA.

I love my vehicle and its technology. However after installation of the latest (fsd v14) update, I observed issues I believe pose a risk to the safe operation of the vehicle. I have made dozens of reports for 30+ days to Tesla for these issues. 1. Driving profiles and speed the update features multiple driving profiles (e. G. , "sloth", "chill", "standard", and mad max). Only the "sloth" profile drives at the “speed limit” (what their outdated map thinks speed limit is). All other profiles drive over the posted speed limit (sometimes significantly). The ability to manually adjust the speed limit setting has been removed or disabled in these profiles. Once the vehicle is in a profile, the system stays in its own selected speed. This behavior prevents the driver from easily controlling the maximum speed when using the system, undermining driver-intent. 2. Incorrect or outdated speed limit data the vehicle frequently displays incorrect speed limits: for example, school zones, reduced speed zones, temporary speed changes, work zones, and even a busy high way I drive everyday that’s been changed for 3 months now, are often not recognized or updated in the system. On several occasions over the past months, the system continued to use an outdated or incorrect posted speed, despite the road clearly being a lower limit. Because the system uses the erroneous speed data as the basis for its automated driving decision (and without manual override of speed in fsd), this situation increases risk-especially in areas where lower speed limits are enforced for safety (pedestrian zones, near schools). 3. Safety risk description the lack of manual speed adjustment under autonomous mode means the driver has less control over vehicle speed when using fsd, reducing the driver's ability to mitigate risk in a dynamic environment. I’m asking for Tesla to either make sure they have constant real time speed limit data, or allow again for manual speed adjusts when in fsd.

The contact owned a 2023 Tesla Model 3. The contact stated that while driving at an undisclosed speed in the third floor of a parking garage, the vehicle suddenly accelerated to full speed unintendedly, and the steering wheel and the brake pedal were inoperable, causing the contact to lose control of the vehicle. The vehicle crashed into a wall and crashed into the vehicle in front, and the vehicle stopped. No further information was available. No warning lights were illuminated. The front driver's side air bag deployed. The vehicle was towed to a tow lot and was deemed a total loss by the insurance company. A police report was filed. There was no injury sustained. The manufacturer was not notified of the failure. The failure mileage was 66,000.

On September 18, 2025, my 2023 Tesla Model 3 (VIN: 5yj3e1eb9pf632327) suddenly accelerated on its own and the brakes failed to respond despite repeated pressing. To avoid hitting other vehicles, I turned into a property driveway and struck a tree. The airbags deployed. This was a case of sudden unintended acceleration combined with complete brake failure, creating a serious safety hazard. Forward collision warning also did not prevent the impact. A police report was filed by the dekalb county police department, GA, USA (report #25-074809, case #0440200), which specifically documented brake failure as the cause of the accident. The report also notes that the driver was injured by the airbag and that the vehicle had to be towed from the scene. A copy of the police report can be provided upon request.

Incident #1 vehicle sitting at a red light. After several seconds the vehicle operating under Tesla fsd suddenly started to drive as if the light had turned green, which it had not. I stopped it immediately. Incident #2 vehicle was stopped a t a red light and started forward again as it the light had changed but had not. I noticed a flashing red light at the next intersection a few hundred feet away. So, I went around the block and tried again and it behaved the same. After a few seconds it started to go again. There was not another light near where the first incident occurred.

On September 7, 2025 at ~7:53 pm, my 2025 Tesla Model 3 operating with full self-driving (fsd) engaged performed an aggressive, uncommanded turn while under computer control. The maneuver occurred so abruptly that I could not safely override steering before impact, and a crash resulted. The Tesla app trip view for trip 3 (7:34–7:53 pm) shows “vehicle on fsd” for 18 min 54 sec and records an “aggressive turning” event at 7:53 pm (2. 0 sec) immediately before the trip ended (screenshot attached). This reflects a steering/driver-assist control defect in fsd’s turning behavior and a failure of collision-mitigation to prevent the crash. I sustained bodily injuries and the vehicle incurred significant damage. I request that this incident be treated as a safety-critical malfunction warranting investigation and corrective action.

On [xxx], at just 9,526 miles, my brand-new 2025 Tesla Model 3 (VIN: [xxx] ) suffered a front motor/inverter failure. The vehicle displayed the warning “front motor disabled. ” Tesla vallejo service confirmed this and replaced the front drive inverter (3du). A catastrophic drivetrain failure at under 10,000 miles is unacceptable and raises serious concerns about reliability and safety. It still doesn't not accelerate as before. In addition, since delivery on [xxx], this vehicle has had persistent rattling and vibration issues in the cabin. I have returned to Tesla vallejo multiple times (April, June, July, and August 2025). Each time, the service manager, steve mcnerney, dismissed or minimized my concerns, blaming “seatbelt rattling” or claiming the issue could not be replicated. After July, I even sent three separate videos clearly documenting the noise, yet the most recent service invoice still instructed me to “provide a video,” showing Tesla ignored or failed to record my evidence. This ongoing defect has been reproduced and confirmed at Tesla service but remains unresolved. Tesla’s dismissive handling and failure to fix the defects create both safety risks and loss of confidence in the vehicle. A front motor failure while driving could result in loss of power, reduced acceleration, or unsafe driving conditions. Tesla has failed to provide a reliable or safe resolution despite repeated repair attempts and clear evidence. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

I want to add an update to my previous report # 11690629. I think it would be helpful to provide what the max speed should be based on my input. So, I will just resubmit the previous report with some additional information. On December 31, 2024, I purchased a new Tesla Model 3 long range with full self-driving (fsd). The problem is the car goes faster than it should when full self-driving is activated. I have attached an example photo of the Tesla screen taken while the car is being controlled by fsd. It shows the actual speed limit of the road is 35 mph, and the car is traveling at a steady speed of 51 mph. It also shows a “max speed” of 64 mph which means the car may travel that fast on this road if it chooses to. Since I use an offset of 10%, the max speed in this 35 zone should be 39 mph. However, the car increased it to 64 mph, and I certainly did not use the right scroll wheel to increase it. This is clearly a safety issue which can lead to accidents. Tesla has made 5 attempts to fix this without success. On the last attempt (September 24, 2025), they refused to answer my questions such why does the max speed suddenly change to a value much higher than my specification? they simply stated that the system was operating as designed. Really? it’s design to drive 51 mph in a 35 mph zone? furthermore, they went on to say I should disengage the fsd system or intervene manually if I believe the car is operating in an unsafe manner. One reason I purchased this car was for fsd. I would expect them to fix it rather than my having to abandon this feature that I pay for. I hope you will encourage Tesla to fix this issue before there are any more fsd-related accidents.

On December 31, 2024, I purchased a new Tesla Model 3 long range with full self-driving (fsd). The problem is the car goes faster than it should when full self-driving is activated. I have attached an example photo of the Tesla screen taken while the car is being controlled by fsd. It shows that the speed limit of the road is 35 mph, and the car is traveling at a steady speed of 51 mph. It also shows a “max speed” of 64 mph which means the car may travel that fast on this road if it chooses to. This is clearly a safety issue which can lead to accidents. Tesla has made 5 attempts to fix this without success. On the last attempt (September 24, 2025), they refused to answer my questions such why does the max speed suddenly change to a value much higher than my specification? they simply stated that the system was operating as designed. Really? it’s design to drive 51 mph in a 35 mph zone? furthermore, they went on to say I should disengage the fsd system or intervene manually if I believe the car is operating in an unsafe manner. One reason I purchased this car was for fsd. I would expect them to fix it rather than my having to abandon this feature that I pay for. I hope you will encourage Tesla to fix this issue before there are any more fsd-related accidents.

Vehicle information: 2023 Tesla Model 3 VIN: [xxx] incident date: [xxx] location: [xxx] summary of the problem: on [xxx], while autopilot was active, my 2023 Tesla Model 3 suddenly accelerated without driver input. I was pressing the brake pedal, but the vehicle surged forward uncontrollably, struck a fence and a tree, and caused major property damage. Both I and my wife (passenger) required urgent care treatment after the crash. Details / safety defect evidence: •Tesla’s own raw logs show the accelerator spiked to 100% immediately before impact. •brake pressure was recorded prior to impact, proving the brake pedal was applied. •despite this, Tesla’s official vehicle data report falsely states “manual brake not applied. ” •autopilot did not disengage when the brake was pressed, contrary to Tesla’s design claims. •the vehicle logged a “near-deploy collision” at ~27 mph, yet the airbags did not deploy. Why this is a safety defect: this incident reflects multiple critical failures: 1. Sudden unintended acceleration. 2. Failure of brake-override safety design. 3. Airbag non-deployment in a crash severe enough to trigger “near-deploy. ” 4. Inaccurate Tesla reporting that conceals braking input. This defect created an extremely dangerous situation that could easily have resulted in fatalities. I am requesting NHTSA investigate Tesla vehicles for unintended acceleration, brake override failure, and airbag non-deployment. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

On August 7th, 2025 at around 8 am in the morning, my vehicles mobile phone car key was in-operable and I was unable to get in the car which led me to trouble shoot how to fix this issue with the car. Upon researching I was directed by Tesla to directly complete a soft reset of the vehicle holding down both buttons on the vehicle once I was inside, and pushing on the brake pedal. Upon completion, my vehicle booted up and I realized that all camera systems were down, my navigation systems were down, my safety features were down, my auto pilot, lane keeping assist and auto brake were down, sensors were down and I was no longer able to pre heat my battery to charge my vehicle due to issues with the navigation. I then took the vehicle to Tesla service center irvine where a service advisor quoted me 2900 for a new ecu and bolts and told me that I needed to replace my whole unit and that I was to cover the cost of the repair even though my vehicle is only 2 years of age and this failure is due to the quality control and software of the vehicle. I have been driving around a vehicle with absolutely no safety features whatsoever such as no cameras, sensors, auto braking, or full self driving due to this ecu failure and I fear for my safety and well being while driving this car.

Had acc set on 80 mph on the hiway yesterday. A vehicle was passing me and the Tesla suddenly applied heavy brake pressure to the point of tires screeching. Speed dropped very quickly to about 50 mph. I had not touched the brake pedal. Brakes released and speed resumed to 80 mph. Very scary and high risk of rear end collision. Lucky nobody was behind me. Don’t want to experience that again.

While driving to work on a local road, I approached a red light where there were no vehicles immediately ahead. However, my vehicle unexpectedly steered off the road in front of a construction sign, entering a ditch. Despite my attempts to regain control of the steering and braking systems, I was unsuccessful. The vehicle subsequently stopped automatically on an incline. Fortunately, I avoided a collision with a gas station and intersecting roadway, but sustained damage to my car’s front bumper. Law enforcement and a towing service were contacted to remove the vehicle. I tried calling the dealership almost half day without an answer, then I went to the dealership where they told me that the hardware is fine but they can’t do anything about the possible software issues which leaves me in a situation where I’m nervous to drive the car. I reached out to the company about the accident and didn’t hear back yet from them. I request a thorough investigation into this incident to determine the cause of the unexpected, highly dangerous, autopilot behavior. I am disturbed mentally and emotionally due to the accident. I also require confirmation of the vehicle's roadworthiness and assurance that it is safe to operate before resuming driving.

Automatic emergency braking, for no reason, occurred twice while on autopilot. Driving on a remote interstate, during the day, no one and nothing in front of me (and I had a passenger that can confirm), and suddenly the car rapidly braked extremely hard. If I hadn't slammed the accelerator immediately I would have been rear ended the first time. The second time, no one was near me. I am attempting to report this to Tesla, although that is somewhat difficult as I am just getting bounced around their automated systems. My passenger and I, and the car behind us were put at serious risk of collision at ~ 85 mph, due to the completely unexpected and extremely rapid braking. This was under simple autopilot, no fsd or other driving assist. Nothing has been inspected yet, or reproduced past these 2 incidents. No warnings or symptoms occurred before or after this issue. Slightly terrified to use autopilot now, as if a semi-truck had been behind me, we would have been flattened. It is also difficult to turn off this so-called "assist" with emergency braking, it auto-reverts to on every start up, which is also dangerous.

My Tesla Model 3 disengaged cruise control while going 68 mph and braked hard for no apparent reason. I was driving northbound on I-405 at 3:45 a. M. Going to lax airport in the number 3 or 4 of six or seven lanes. Cruise control had been activated for at least 10 minutes before the incident at a speed of 68 mph. There was no traffic within half a mile before or after me due to the time of day. Neither my left or right foot were near either the brake or acceleration pedal, nor were they in motion. Both hands were on the steering wheel and no control was being activated. The only noticeable environmental condition is that the road surface had just changed from a dark gray asphalt to a bright white new concrete roadway. No emergency braking alert was seen or heard, so I do not think it was a false collision detection, and there was no car within a half mile. However, I do believe the severity of braking could have caused an accident if there had been someone behind me. Tesla Model 3 software version was v12 (2025. 20. 6 046c4575d120).