Vehicle Speed Control Problems of Tesla Model Y - part 1

This is my 10th report; it relates to 2 issues I have reported before 1. The "phantom breaking" on cruise control that I have reported a few times previously has apparently been fixed on a software update, but we were not notified. I went in to santa fe Tesla where I took delivery of my vehicle and got into a discussion about my disappointments with this car, specifically the tires (see #2). I mentioned my past problems, including the phantom breaking. The man was dismissive and a bit defensive and asked if I'd made an appointment. I said I'd been told several times they hadn't figured out a software fix (and even Tesla employees were simply refraining from using cruise control, which is what I did). He said they "fixed it a while ago" and he's not had complaints since then. I tried cruise control on my 45 minute freeway drive and indeed, the problem did not occur. Interesting that they knew it was an ongoing problem, didn't deal with it, and didn't announce when they finally did fix it. I do not yet know if it is an ongoing safety problem for me but I'm planning to gradually increase my use of cruise control, since most of my driving is high-speed freeway driving. 2. I asked about getting warranty rebate for my original tires that have failed at 38k miles. He said I would have to pursue that through the distributor (american tire?) and that he'd only had 2-3 customers ever do that. He said most customers just pay for better tires. He offered to sell me another continental tire in the $400 range and implied that I could find tires through a tire store. I went to discount tire who can get me a rebate on only 1 of the 4 tires because it's down to 4/32" tread. The other 3 can't be warrantied until they reach 4/32". . . And I've already hydroplaned/slid on the freeway in a sleet storm with wet roads. The company knowingly provides inadequate tires and does not stand behind them. This is an unacceptable safety risk and a moral outrage.

See all problems of the 2023 Tesla Model Y 🔎.

Vehicle will suddenly apply brakes while using standard cruise control for no apparent reason. This is extremely dangerous as it has almost caused several accidents on the highway. I have almost been rear-ended several times. This is a very common problem and well documented problem referred to as "phantom braking" on Teslas and something needs to be done immediately.

See all problems of the 2021 Tesla Model Y 🔎.

I was at full stop on [xxx] facing [xxx] at a red traffic signal at intersection. Then while still at light which was red the vehicle unexpectedly accelerated toward [xxx] on its even with feet on brake, I attempted to maneuver to avoid colliding with vehicles traveling on [xxx] , then made a sharp right turn on sidewalk of [xxx] drove striking a "bee line bus" sign located in front of [xxx] . I was able to maneuver not hitting any pedestrians and crashing vehicle out a brush on sidewalk without putting passengers/family in car at risk of injury information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

See all problems of the 2025 Tesla Model Y 🔎.

On February 11, 2026, the 2025 Tesla Model Y "vision autopark" system initiated an uncommanded high-speed reverse acceleration into a stationary yellow concrete bollard in a parking lot. The vehicle's vision-only parking assist hardware failed to detect a clearly visible, fixed obstruction and displayed a clear path on the system interface immediately before impact. No warning lamps, chimes, messages, or other alerts preceded the failure. The system provided zero indication of the imminent collision. The vehicle closed the distance to the bollard in under one second, exceeding human reaction time and making manual braking intervention impossible before impact. This failure mode — autonomous acceleration toward a stationary object without detection or warning — creates a severe crush hazard for pedestrians and property. The vehicle and its onboard data logs are available for inspection upon request. High-definition video evidence of the failure has been preserved showing the system ignoring the visible obstacle. The problem has not been confirmed by a dealer. The manufacturer's service center refused to inspect the vehicle or review data logs on the date of the incident despite an immediate in-person request. The vehicle has not yet been inspected by insurance, police, or the manufacturer. The failed component is the Tesla vision-only autopark system, including its camera-based object detection and autonomous vehicle control software.

It was snowing and I was driving slow. About 8:40am, Feb 6th, 2026, I got a "one pedal driving disabled" alert just for a moment, then tried to stop before an intersection because a signal was turning to red. However, break didn't work and I had to enter the intersection under a red signal. Fortunately, there was no car in front of me, also a car coming from the side didn't notice signal changed. No accident, but very very scary. On Dec 6th, I also got an alert "one pedal driving disabled" and even after I released an accelerator pedal, speed didn't slow down. I reached Tesla on Feb 6th, but the service scheduled 4 weeks later. It's not safe to drive at all, thus, I will try to have them to check my vehicle ASAP.

Tesla supervised self driving (fssd) update 14 removed the ability for the vehicle operator to set speed targets. Additionally, their system is unable to accurately determine speed limits for many roadways. The discrepancy between fssds perceived speed limit and actual speed limit can be as much at +/- 25mph. The discrepancy can occur suddenly and at any time during a drive, even on stretches of road with a consistent speed limit. This results in moments of dangerous acceleration and/or deceleration that is not requested by the vehicle operator or can be reasonably anticipated. This causes erratic driving behavior to both the Tesla and to other motorist in the vicinity. Erratic, unpredictable driving is a major cause of traffic accidents that can lead to serious damage, injury, or death. Prior versions allowed the operator to set a speed target, similar to standard cruise control, that the vehicle attempted to maintain and would not exceed. Fssd v14 does not allow the vehicle operator to have any control over the speed of the vehicle to any degree that meaningfully contributes towards safe, legal driving.

On January 9th my wife got into an accident in our 2022 Tesla Model Y vehicle. She reported that as she was backing out of a prking spot in a strip mall, the vrhicle suddenly accelerated backward involuntarely which resulted in colliding with a vehicle which was approaching from the rear side. My wife reported the speed was so violent that she felt dizziness. When she took the car bto the Tesla shop for repair by the insurance, the Tesla repair people discounted her reporting and did not do any follow-up to investigate the issue. Note the onboard camera recorded the swift movement of the vehicle and I will try to upload it. We have read that such problem was looked into by the nthsa in the past and that it is being revisited again. Note that that Tesla has determined the vehicle as being totalled and has kept it at their shop. Please let us know your thoughts on this matter so if this is a serious problem that it can be addressed so it won't happen to others. My wif was lucky she didn't get hurt and also she didn''t heart others. Please note I am currently traveling out of the country and will be be back in the us on March 12, 2026. You can contact me via my email or I will be available for phone conversation on the indicated date. Also please note I could not upload the recording of the on board camera because of the format incompatibility. The phone number included is my wife's and please feel free to contact her.

See all problems of the 2022 Tesla Model Y 🔎.

Vehicle equipped with Tesla full self-driving (supervised v 14. 2) software exhibits unsafe automated following behavior. The system maintains following distances that are too short at steady speeds, including behind stable lead vehicles with no braking or traffic disturbances. Tesla’s own safety score system flags this behavior as “following too closely,” indicating elevated collision risk. However, the driver has no available control to adjust minimum following distance or impose safer headway while using fsd this represents unsafe autonomous tailgating behavior with loss of driver control authority over safe following distance, creating increased risk of rear-end collision and hazardous automated driving conditions. Tesla offers several controls (sloth, chill, standard, hurry, and madmax) modes, none of which solve the issue if the driver in front is driving the speed limit. My car under fsd will crowd (or tailgate) the front car regardless of the mode. In one instance, I was following a car under fsd in sloth mode and it made the car in front of me pull over just to get me off their tail. . . . This is certainly now how I wish to drive, and don't want my car driving this way. Failure mode: automated headway policy dominance, lack of driver override, unsafe autonomous following distance.

I am reporting a repeated safety defect that happens only in rainy conditions. My 2022 Tesla Model Y repeatedly shows critical safety warnings including “automatic emergency braking unavailable”, traction and stability control disabled, and “vehicle hold unavailable”. This has occurred during normal driving in rain every rainy season for 3 years, despite 4 service visits and parts replacement including the inverter. It started when I was pregnant and is now ongoing with my newborn in the car. The system failures happen while driving in normal wet/slippery conditions and greatly increase the risk of a crash. This appears to be a systemic safety defect, not driver error, and Tesla has not fixed it after multiple service attempts. Events & dates: •first occurrence: Feb/2024 •service visits: 02/01/2024 1. Verified customer's concern via vehicle log data. Technician reviewed the vehicle's logs and found that the vehicles communication system was faulted. Technician was not able to duplicate the concern at this time. Performed diagnosis and found no issues present at this time. Verified vehicle's communication system is operating as designed at this time. No further repairs are recommended at this time. Recommending customer to continue to monitor situation at this time. 2. Updated vehicle to latest available firmware version per service bulletin. •most recent occurrence: 01/01/2026 fyi today is the 4th time I’ve indicated this issue , and this is during my pregnancy again, I feel extremely stressed and helpless.

I have a 2023 Tesla y. The curvature assist function has nearly caused a half dozen rear end collisions. When in cruise control, it kicks in on (1) highways, near exits when I'm not taking the exit (2) regular roads with no curve or intersection, (3) regular roads with departure lanes that I'm not using. The car behind me only see's a sudden brake light with slow down until I press on the accelerator. Please have Tesla install a disable function for curvature assist.

Tesla self driving detects and sets a speed limit and displays it as a speed limit icon. I used self driving to exit my driveway, which turns onto a dirt road with a speed limit of 15 mph. Near the bottom of the driveway self driving suddenly reset the speed limit from 10 mph to 55 mph. The car then accelerated abruptly shortly before the turn onto the dirt road. There is no mechanism for overriding the speed limit the Tesla self driving automatically selects. It is clear that the speed of the vehicle is adjusted according to the speed limit that Tesla self driving selects. Before I could regain control of the vehicle I was almost into the field opposite the driveway. The inability to re-set the automatically selected speed limit is dangerous. The speed limit has spontaneously reset to 55 mph on two other occasions, and the vehicle spontaneously speeded up.

The car spontaneously accelerated while approaching a stop sign. I was able to hit the brake to stop it.

See all problems of the 2024 Tesla Model Y 🔎.

Vehicle equipped with Tesla full self-driving (supervised v 14. 2) software exhibits unsafe automated behavior due to removal of driver speed control. The system infers speed limits and driving speed without allowing the driver to set a safe maximum speed. In residential neighborhoods with children, pedestrians, and shared social spaces, the vehicle drives at model-inferred speeds that are socially and physically unsafe. Driver is unable to impose a lower safe speed limit without disengaging. Tesla removed previous option for driver to adjust speed. In a state park campground, the system failed to detect a posted 15 mph speed limit and inferred a 55 mph limit. The vehicle accelerated to unsafe speeds on narrow, pedestrian-heavy roads, with no driver ability to cap speed while under fsd. This represents a loss of human override authority and unsafe autonomous system behavior, creating pedestrian hazard and safety risk. Failure mode: automated speed inference dominance, map prior misclassification, lack of driver override, unsafe autonomous acceleration in pedestrian environments.

The car stopped in a busy freeway saying electric issue and doesn’t give sufficient time to drive to shoulder. This is the 2nd time this happened within 2 weeks. First time, Tesla said high voltage controller had an internal issue with voltage sensing. The hv controller was replaced along with pyrotechnic fuse. Tesla assured this shouldn’t repeat and it repeated again. This has kept us in a catastrophic situation. I request immediate attention to this error and matter.

The vehicle was in supervised full self driving on the turnpike, when all of a sudden it darted out of the lane into th grass hitting a guard rail.

The contact owned a 2025 Tesla Model Y. The contact stated that while the vehicle was parked in a school zone area, and while engaging the brake pedal, the vehicle unexpectedly lunged forward with no warning light illuminated. The contact stated that after lifting their foot from the brake pedal, they heard a hissing sound and the vehicle accelerated. The contact attempted to avoid a collision by making a left turn; however, the vehicle traveled into a bushy area and rolled down a hill. The contact sustained injuries, including head, neck, and back injuries, and received medical attention at a local emergency room. The contact stated that the air bags deployed during the incident. A police report was filed. The vehicle was towed and deemed a total loss. The dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was not made aware of the failure. The approximate failure mileage was 7,213.

See attached document for complaint.

The contact is a police officer from the simi police department, who called on behalf of the owner of a 2026 Tesla Model Y. The contact stated the owner was driving at 30 mph with full autopilot mode with direction destination set, the vehicle increased in speed to make a u-turn on the opposite side of a driveway; therefore, the driver attempted to disengage the autopilot and depressed the brake pedal. The vehicle failed to stop and instead increased in speed, causing the driver to crash into a curb, a Dodge ram truck, a light pole, and an occupied Nissan maxima vehicle, where the vehicle came to a stop. Both vehicles that were crashed into were occupied by 1 occupant each. The contact stated the owner's air bags did not deploy. The contact stated that the owner did not sustain any injuries. No medical attention was required. The vehicle was towed to an auto collision center; however, the vehicle looked drivable. A police report was filed. The manufacturer was not notified of the failure. The approximate failure mileage was 5,000.

Incident date 11/27/25 incident location: CA state highway 101between san luis obispo and los angeles. Driving conditions: daylight/dry roadway. Description of safety defect / complaint: during a single approximately 400-mile highway road trip, while using Tesla’s traffic-aware cruise control (tacc) feature enabled, the vehicle abruptly and forcefully applied the brakes on at least six (6) separate occasions without any apparent cause. On each occurrence: • no vehicle ahead was braking or decelerating, • no vehicle was merging or cutting in front of my vehicle, • no stationary or moving obstacles (including overpasses, road signs, or debris) were present in or near the travel lane, • the forward roadway was clear and unobstructed for a considerable distance. These sudden, un-commanded braking events were severe enough to cause significant deceleration, requiring me to immediately intervene by pressing the accelerator pedal to override the system. Due to the frequency and unpredictability of these phantom braking events, I no longer feel safe using traffic-aware cruise control or any Tesla advanced driver-assistance features that rely on the same sensor suite and software. I am filing this report because repeated uncommanded braking in highway traffic constitutes a serious safety hazard that could lead to rear-end collisions, particularly when closely followed by other vehicles or commercial trucks. Additional information (if applicable): • software version at time of incident: v12 (2025. 38. 9 fe 714a33a545) • full self-driving capability package: no. Enhanced autopilot: no. • any dashcam or sentry mode footage available: no I request that NHTSA investigate this recurring phantom braking issue in Tesla vehicles equipped with traffic-aware cruise control and autopilot systems.

My car installed update v12 (2025. 38. 8. 7) last night. This morning I was driving to work using autopilot when alarms sounded, the hazard lights turned on, and the screen flashed a warning that I had to take over immediately. The message included a note that autopilot had failed due to a "systems error. " the navigation and visualization screen froze, went blank, and took 10 minutes to come back on. I asked Tesla to roll back the update and they have told me that they cannot do that. I came very close to crashing into a concrete guard rail as the car was going around a turn when the system failed.

When using cruise control (traffic aware cruise control and autosteer) the car acts dangerously and stops for no reason. I've been driving on open roads with no traffic in front of me on regular roads, the car will slam on the brakes and it causes the people behind me to need to slam on their brakes as well. I feel like I'm going to get into an accident constantly. . . I was on the freeway and no one around in front of me and the car slammed on the brakes to almost a stop on a 70 mph speed limit road. Today the same thing occurred in high traffic on a 55mph road, luckily the driver behind me wasn't to close and was able to stop in time . . . There is no option to use regular cruise control or disable enough features to prevent this from occurring. . . It's incredibly terrifying. If they can't do traffic aware cruise, there should be the option to do regular cruise. . . And it shouldn't require passing Tesla $8000 for full self driving to be able to drive your car at a speed without the that of being rear ended. This feels like extortion. . . I've submitted feature requests to Tesla, talked to their bot about fixing this and I've currently been on hold for almost an hour without any response. This dangerous tech is unacceptable!.

The latest version of Tesla fsd software does not let me fully control my speed. You can switch profiles or stop using full self-driving, but you cannot set the speed to what you want. In the last version, you could use the right scroll wheel to increase or decrease the speed. Now that shifts profiles but even that does not give you control over what exact speed you are driving.

Detailed description of the defect: Friday incident: while picking up my son from school, the vehicle abruptly disabled multiple safety and driver-assist features. The car rolled backward on a slight incline, failed to display any surrounding vehicles on the fsd visualization, and retained accelerator input even after I removed my foot from the pedal. The vehicle continued to speed up slightly in drive and reverse without my input. Soft resets did not resolve the issue. Monday incident (collision caused by malfunction): on Monday morning, the same malfunction occurred. As I reversed into my garage with the door opening, the car again held the accelerator input after I lifted my foot, causing the vehicle to continue moving backward unexpectedly. The vehicle struck my garage door, causing property damage and a dent to the trunk. This was not driver error. It was unexpected propulsion after pedal release — an extremely dangerous condition.

On 11/01/2025 at (12:15 pm]) my Tesla Model Y (VIN: 7saygaee8rf983245) was **parked in park/hold mode** in the winchester park parking lot, los angeles ,California the * navigation was set to an address in the center of the park**. The address on the address log of the car navigation system. The **Tesla gps navigation destination was set to a point marked in the middle of the park** (not a parking spot or road). **without any driver input** (no accelerator pedal pressed, no hands on wheel), the vehicle **suddenly shifted into drive, jumped the curb, and accelerated approximately more than 30 feet] into the park grass**. This caused **damage to wheels, and all the passenger side of the vehicle to impact with a large rock placed in the park **zero pedal input** — confirmed by driver and will be verified in Tesla server logs. No injuries. No other vehicles involved. **root cause**: **full self-driving (fsd) software / navigation system** incorrectly engaged **lane keeping assistance** while parked, triggering **unintended acceleration** via **speed control** logic. The car was on software update and suddenly disappeared. The car **autonomously drove itself** toward the gps point **from a complete stop**. Police report filed to lapd (case #251102900293). Tesla vehicle data report requested. **request NHTSA investigation** into * navigation-induced unintended acceleration from park**.

Recently Tesla released it's latest version of fsd, v14. 1. 4. One of the key features is the revamping of the driving modes: sloth, chill, standard, and mad max. Tesla also removed the ability to manually increase or decrease the speed of the car. This is a problem. Let me illustrate it with a real-life example. Yesterday I was driving of a 40 mph road and the car correctly set the speed. I was using the standard mode so the car allowed an overage of around 10% so the actual speed was 45 mph. In our area this is typical for most drivers. As we entered a village, the posted speed limit was changed to 30 mph. The panel was perfectly visible and readable. The car did not register it and continued at 45 mph. I changed to mode to "sloth" and the car decreased its speed to 40 mph but I was still 10 mph above the legal speed limit. I came across a second 30 mph panel and again the car "ignored" it. Because I did not have the ability to manually reduce the speed of the car, I had to disengage fsd and drive the car by myself. Tesla claims fsd must be supervised. Fine. But removing the ability to manually change the speed of the car should be a requirement not a design preference.

The contact owns a 2021 Tesla Model Y. The contact stated that while coasting into the garage, the vehicle independently accelerated. No warning light was illuminated. An independent mechanic or dealer was not contacted. The vehicle was not taken to a dealer or independent mechanic to be diagnosed or repaired. However, the contact was in the process of repairing the vehicle. The manufacturer was not notified of the failure. The approximate failure mileage was 38,727.

Full self driving disengage with no warning and won’t start up again. Unsafe.

The newest fsd update v14 as of 10/23/25 took away the ability to manually limit the speed limit. Full self driving profiles are fixed, and the limits are invisible to me as the driver. The all except the sloth fixed profiles can cause the speed to go 15 miles an hour over the limit unexpectedly which can cause arrest. There is also some very concerning random breaking now in the middle of empty roads where there might be a slight bump during the dark morning hours. The lack of manual speed control also is an issue when the expected speed limit is wrong in the system. In a 20 mile an hour neighborhood the car thinks it is 25 and can never drive compliant to the speed limit even with the sloth profile. This is a dangerous oversight.

Upon purchase of the vehicle, unlike previous models and versions of the software - the vehicle’s speed limit control was incapable of being set - instead, using fsd, you had to select from percentage based offsets - which were frequently ignored and would still go much higher or much lower than the percentage value set. The owner of the vehicle was unable to say limit to only 10 over the speed limit; instead it was percent based and not reliable. In addition, more than a third of the time - the speed limits in the infotainment system did not match the posted speed limits. Sometimes, in the middle of a highway - it would randomly go from 55 to 25, posing a significant threat hazard when using the fsd or cruise control system (which is something Tesla charges extra for access to) causing the vehicle to immediately decrease speed when other vehicles behind are getting up to speed and not expecting a vehicle to randomly slow down excessively. Additionally, when you manually override the speed limit control, or the system does, the user interface hides this limit so the driver is unaware of what limit of speed it is set to. These issues were already bad enough, but just yesterday my vehicle was pushed a software update that dramatically reduced the performance of fsd, and now I am unable to manually control the speed limit at all in fsd. This was a regression from purchase, when a scroll wheel at least allowed me to manually set the speed limit or correct it when it was wrong. Now, that feature has been removed and instead there’s a duplication of fsd profiles (left/right on the right scroll wheel does the same as scrolling up/down). And continuing this trend, the driver is incapable of seeing what the speed limit is set to because it’s hidden from the user interface. In addition, the driving behavior for fsd has significantly regressed from before the update. Cruise control’s most basic functionality should be to set a speed limit. Now this feature has been removed.

I am writing to formally report a serious malfunction involving my Tesla vehicle. On my 2024 Tesla Model Y. I experienced an unexpected accelerator malfunction that caused the vehicle to surge forward uncontrollably. The incident occurred at approximately as I attempted to dive in slowly, the accelerator suddenly malfunctioned and my car creeped in slowly and rapidly increased power without my intention. Despite immediate attempts to brake and regain control, the vehicle continued to accelerate and subsequently collided with a gate, resulting in significant front-end damage. I firmly believe this was due to a mechanical or electronic failure in the vehicle’s accelerator or related control systems. The malfunction posed a serious safety hazard and could have resulted in injuries, and this has affected me mentally. I am requesting a full investigation into this malfunction, including an inspection of the vehicle’s electronic logs, sensors, and accelerator system to determine the cause of this unintended acceleration. I would appreciate your prompt response and guidance on the next steps to resolve this matter, including vehicle inspection, repair, and coverage options.

There was a sudden unintended acceleration and the brake did not work, causing a major accident. Car caught fire and door would not open. The car has completely engulfed. There were no warning lamps, messages or other symptoms prior to the failure. Vehicle has been inspected by insurance and police, but not by manufacturer.

Tesla removed the speed limit offset feature in fsd version 14. 1. 4 and now only uses speed profiles called sloth, chill, standard, hurry, and mad max, and this has made my car extremely unsafe to drive. The problem is that these profiles make the car go either way too slow or way too fast and I cannot adjust it to match actual traffic conditions anymore. To make matters worse, the speed limit detection is broken and frequently shows the wrong speed limit for the road I am on. When I use sloth, the car never goes over the detected speed limit no matter what, so if the system thinks I am in a 35 mph zone when I am actually on a 55 mph highway, my car crawls along at 35 while traffic is flying past at 60-70 mph. I have people tailgating me, honking, flashing their lights, swerving around me dangerously, and I have almost been rear-ended multiple times because my car is going so much slower than everyone else. Without the ability to set a maximum speed offset, I am stuck going whatever speed the broken detection system thinks is right. If I switch to standard, hurry or mad max to try to keep up with traffic, sometimes the car goes way too fast for the actual conditions or blows through school zones and residential areas at unsafe speeds. I cannot fine-tune the speed anymore to drive safely with the flow of traffic. I am forced to either be a rolling roadblock and risk getting hit from behind, or use an aggressive profile that might go dangerously fast. This happens every single time I use fsd now and the combination of broken speed limit detection plus no manual offset control has created a seriously unsafe situation. I feel endangered every time I drive and I am genuinely worried about causing or being in an accident.

Client was severely injured (traumatic brain injury, fractured skull bone and ankle with ongoing cognitve and physical symptoms, probably permanent) as a pedestrian when crossing rt 28 in chatham, MA. He was struck by a 2023 Tesla Model Y in reduced roadway visibility conditions due to sun/shade conditions. The auto braking system failed to activate in time to avoid the collision. This appears to be directly related to NHTSA investigation pe24031.

It was raining on I-287 north bound in bridgewater township, NJ. I was driving my Tesla Model Y well below the posted speed as it was raining. Suddenly my car took a spin, I lost control of the steering. Car took a 360 degree turn from right most lane on 3-lane highway and ended up on the side of the left most lane, rear ended into the bushes, hit the trees and damaged the back of the car. My car is all wheel drive, still I lost the control. I was so lucky to be alive.

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.