Vehicle Speed Control Problems of Tesla Model Y - part 2

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.

See all problems of the 2021 Tesla Model Y 🔎.

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**.

See all problems of the 2024 Tesla Model Y 🔎.

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.

See all problems of the 2023 Tesla Model Y 🔎.

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.

See all problems of the 2022 Tesla Model Y 🔎.

Pulled into hospital parking garage. Stopped to pull parking ticket. When the parking gate was raised, Tesla immediately took off at very high uncontrolled speed. Basically a runaway vehicle. There was no accerlation on my part. Brakes did not work. Hit parked car in the garage about 300 feet from the parking gate. I was taken to hospital with broken wrist. Car has been totaled.

The contact owned a 2026 Tesla Model Y. The contact stated that while depressing the brake pedal to attempt to stop at a stop sign, the vehicle failed to respond as intended. The contact mentioned that when attempting to make a left turn, the steering wheel seized and became difficult to maneuver, and the vehicle crashed into a curb and merged into a landscaping facility. The contact was able to shift the vehicle into neutral, then reverse. The vehicle began to work as intended, and he looked out of his rearview mirror. He could see smoke coming from the rear passenger side, and he heard an abnormal noise coming from the rear passenger tire. No warning lights illuminated. A dealer was contacted. The vehicle was towed to a dealer to be diagnosed; however, the diagnosis was unknown. The contact mentioned the dealer, and insurance deemed the vehicle a total loss. The vehicle was not repaired. The manufacturer was notified of the failure and offered no assistance. The approximate failure mileage was 4,900.

In 9/2025 I noticed that the vehicle software was defaulting to a speed limit of 55 mph. I noticed that when in any form of autopilot and fsd it would accelerate to that speed. This happens in any situation before the car encounters a sign or an area that it's internal map corrects it, which is not common outside of major routes in idaho. This includes paved marked roads, graded roads, single track dirt roads, my driveway and garage. Sometimes the car controls it's speed consistent with conditions, sometimes not. It can happen unexpectedly, and that's the issue. Where I have learned this is a problem, I of course turn off the ap or fsd and drive myself, however, if I am in driver assist mode and things are going well and the speed limit in the vehicle changes suddenly to the default 55 mph, it can take a moment for me to react. In October 2025 I reported this to my Tesla service center as well as Tesla's over the air and on line email reporting options (from which I got no response). The service center entered a ticket directly with Tesla, and told me that that Tesla was aware. The explanation that came back was that it was due to a mapping update for the internal map of the car. They said it was the result of google maps setting the default speed limit in idaho, which is where I live, to 55 and that this was due to a September 2025 update. They said it might be corrected with the next update, which has not occurred at this point (January 2026). This speeding behavior can happen suddenly and unexpectedly and seemingly randomly, and has the potential to injure pedestrians, the driver, and property, not to mention that it is also exceeding by far the legal speed limit. Drivers from other areas that may not be aware of the issue are likely to be caught unaware. There is absolutely no reason for the default speed to be 55, ever. It's unsafe, and unnecessary. It is rare to see a speed limit of 55 at all in idaho. Most of the roads are above or below that speed limit.

When using the adaptive cruise control or “autopilot” feature on my Model Y, the vehicle will brake extremely hard without warning. This sudden, unnecessary braking is commonly referred to as phantom braking. The failure is available for inspection upon request. This malfunction poses a significant safety risk to myself and others, especially vehicles following behind, as it could lead to rear-end collisions. The issue is widespread, with many other drivers experiencing the same problem. The problem is easily reproducible on highways, particularly at certain intersections where no obstacle is present. The system will sometimes display a “curvature assist” prompt despite the road being straight, causing the vehicle to brake abruptly. I have not taken the vehicle to a dealer because the warranty has expired. The issue has not been confirmed by a dealer or independent service center, nor has it been inspected by the manufacturer, police, or insurance representatives. However, I reported it directly to Tesla and have received no response. No warning lamps or error messages appear before the failure, aside from the inaccurate “curvature assist” prompt. Cause: unknown.

The curvature assist function activates and applies the brakes automatically on straight and level sections of freeways with no observable obstacles or curves, requiring driver to resume acceleration to override the brakes.

After installing the most recent Tesla software update, my vehicle immediately displayed multiple alerts: traction control disabled, stability control disabled, and reduced steering assist. Cameras were disabled, navigation was disabled and my vehicle location was wrong. The vehicle lost core safety systems that are critical to safe driving the car functioned normally before the update. Immediately afterward, these safety systems were disabled. Tesla service has since diagnosed and confirmed, they state “an internal short within the drive assistance module (computer). The internal short is causing excessive current draw, resulting in loss of driver assistance features. The latest software has revealed the underlying root issue within the car computer. ” this indicates that the vehicle was operating with a latent defect that Tesla’s diagnostic update exposed. The update did not cause wear-and-tear failure; it surfaced a hidden safety defect inside Tesla’s own hardware. Why this is a safety concern loss of traction control, stability control, and steering assist creates a significant risk of loss of vehicle control. If this had occurred while driving at speed, the sudden loss of these systems could have led to an accident. Attempting a reboot while driving (Tesla’s standard troubleshooting suggestion) would have created further distraction and risk. Luckily when the car catastrophically failed and was unable to turn, I was in my driveway and not on a highway or any other roads.

Driving on I 880 south on the fast lane. The car suddenly braked for no reason and began to shutdown. It warned me to pull over before complete shutdown. Luckily there was space on my left and I was able to rolling stop. Nothing on the screen was working. Turned on hazard light. Got out of car with my phone. Accessed Tesla app and ran battery check. After couple mins the error went away. Tried to slowly move with hazard light on. It appeared to have fixed itself. Slowly merged back into freeway when it was safe. Attached notification when I tried to schedule service request.

While driving along a few roads using traffic aware cruise control (tacc) or autopilot (ap), the car will suddenly brake for no reason at all. Speeds reduced from 75 to 50 in 2 seconds. Had there been a car close behind me, we may have collided. I am able to reproduce this on several other roads as well. I have not yet reported this to the manufacturer, but a review of internet forums shows this to be a relatively common occurrence among owners. They refer to this as phantom braking.

The car don't run well.

Tesla's fsd functions slowly has been reduced in the last years. Firts Tesla disabled the double pull function, resulted taken away the standard cruise control function. Lately, the fully paid ($12000) fsd is not recognizing streetsigns anymore, which worked perfectly before. This function is crucial to manage speeds, lanes, pedestrians and school zones or just attend in public roads! Tesla service center refuses to fix this issue or offer any additional solutions! this is very concerning and those vehicles with full fsd are not safe to operate on public roads anymore! thank you.

Unknown I was driving with no advanced driver assistance systems (adas). My vehicle took control of the steering wheel, swerving uncontrollably, almost hitting approaching cars, and a wooden electricity post. It was diffucult to keep the steering wheel steady. I struggled to pull the vehicle to the side of the road until I made a complete stop. A witness checked on me and was concerned that I had almost crashed.

I have had supervised full self driving in the vehicle for well over a year. I have used the Smart parking feature Monday-Thursday to park the vehicle at work and it has worked flawlessly. On [xxx] around [xxx], I went to [xxx] . After entering the gate to parking on [xxx], I drove slowly. I was able to select a parking spot and tapped on it on the screen for the selection and then started the automatic parking. There were no other cars around as we were all just starting to enter the gate and park. The car began to move in reverse. It then paused turned the wheel a bit, turned it back, tried to decide what it was going to do and started to move forward. The car then drove up the curb on to the walkway and almost drove into the building. I was able to hit the brake quickly to stop the process. There was no damage to the building or the car. I had never had an issue with the Smart parking until this time. I then backed the car off the sidewalk and parked it myself. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

Both my wife and I accidentally used the right side stalk to signal for a turn. Our mistake, except the car responded by suddenly accelerating. Fortunately we were both able to put on the brake. In the wrong situation this could be very dangerous.

See all problems of the 2025 Tesla Model Y 🔎.

On Tuesday, [xxx], around [xxx] returning home and in my driveway when the following happened. Pulling into the left side of the driveway because a utility van was parked on the right side of the driveway with the rear door and driver’s side door opened with no one in the vicinity. There was not enough room to go forward into the garage. I was almost at a complete stop with the intention of getting out of the car to shut the drivers side door. That was when the car sped up at full speed and turned to the right into the van and continued in the right direction into the garage. The car was headed to the right back corner of the garage smashing into paint cans, a freezer, sink and cabinets. I had no control over the car from the time the car sped up and smashed into the back of the garage and it all happened in a matter of a few seconds. The vehicle has been totaled by the insurance company. This incident was recorded in the vehicle’s computer. The police department was called the same day and a police officer came to the house to record the incident. The car was towed to gerber collision & glass, 10491 corkscrew commons dr. , estero, FL 33928, phone (239) 947-6050. The car computer system should have recorded the event. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).

See all problems of the 2020 Tesla Model Y 🔎.

The adaptive cruse control would stop working off an on. Also it would give false land departure warnings causing driver to swerve thinking they were going to run into another care.

Vehicle hood latch censor . Around Feb 25 2025 my car was parked in parking lot when I shift to d it showes hood latch need service I towed the car to service center . They replaced the censor by saying its a old bad censor . Now again my car parked in garage March 17 the same hood latch censor error . And it wont let you drive more than 15 mph . Even the hood is locked . If you check kn social media alot of people faced the same issue.