Adaptive Cruise Control problems of the 2025 Tesla Model Y

I am filing a safety complaint regarding Tesla's removal of driver-controlled maximum speed in fsd (supervised), a change that has alarmed a significant number of Tesla owners and safety-conscious drivers. Previous software allowed drivers to set a precise maximum speed via the steering wheel scroll wheel while fsd (supervised) was active. Tesla replaced this with fixed "speed profiles" (sloth, chill, standard, hurry, mad max), none of which allow a driver to set a specific speed. Each profile operates at a programmed range relative to the posted speed limit. Even the slowest profile (sloth) has been observed exceeding the speed limit. The system also frequently misreads posted limits entirely. This is a serious safety regression. In winter conditions, a cautious driver may need to travel well below the speed limit due to snow or black ice. Previously, they could reduce fsd's max speed precisely. That is no longer possible, the system determines speed, and the driver cannot override it downward while fsd remains engaged. This concern is not isolated to just me. Online forums and Tesla owner communities have seen widespread discussion and frustration over this change, with many drivers expressing that it has made them feel unsafe and less in control of their own vehicle. Removing precise speed control from a supervised autonomous system directly contradicts Tesla's stated position that the driver remains responsible for safe operation. This is an ongoing issue and not limited to a single date for the "tell us the approximate date this incident occurred. " I request NHTSA: 1. Investigate Tesla's removal of driver-adjustable maximum speed in fsd (supervised); 2. Evaluate compliance with fmvss and driver control guidelines for automated driving features; 3. Require Tesla to restore precise, driver-controlled maximum speed settings.

On January 28, 2026, the vehicle (a Tesla Model Y) was operating with the full self-driving (fsd) system actively engaged in normal highway traffic conditions. Without any prior warning messages, chimes, or system alerts, the fsd system abruptly disengaged approximately 1 second before the vehicle steered into a concrete road divider. Component failed: the Tesla full self-driving (fsd) software and underlying perception/control systems failed to maintain the lane and abruptly handed over control with insufficient time to react. The vehicle and its data are available for inspection. Safety risk: the sudden, sub-second disengagement provided the driver with zero time to react, take manual control, or perform an evasive maneuver. This system failure directly resulted in a high-speed collision with a road divider, causing significant vehicle damage and physical injuries to the driver that required medical treatment. Inspection/confirmation: the vehicle is currently subject to an open insurance claim and has been evaluated for repair. Warnings: there were no warning lamps, messages, or requests for the driver to take over prior to the immediate 1-second window before the crash. Evidence: I have downloaded and preserved the complete event data record (edr) and the multi-angle dashcam video files. The edr data mathematically documents the sub-second disengagement, and the video files confirm normal traffic flow with no external hazards forcing the collision. I can provide the edr pdf and video files to NHTSA investigators immediately upon request.

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.

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.

Incident report – Tesla y – unintentional acceleration Saturday November 29, 2025, approximately 2:40 pm on the above-referenced date and time, we were returning home with the intention of pulling the car into our garage, an activity performed over a hundred times in the one year we have owned the car. Because of the need to back in to allow the car to be charged, the following procedure is adhered 1. Disengage self-driving (if it was being used) in the street prior to entering the courtyard for residence. 2. Pull forward three-quarters of the way into garage (since the residence is the last on the courtyard and the car cannot be pulled beyond the garage opening to directly back in). 3. Place car in reverse and slowly perform k-turn to back into garage. On the date in question. The following anomalies occurred: 1. After placing the car in reverse (action 2), instead of starting to back out, the car lurched forward. The brake was immediately applied and the car stopped about a foot before hitting the garage wall. 2. The brake was applied again to assure self-driving was disengaged and proceed with action 3. 3. Car was placed in reverse and accelerator was lightly pressed to slowly back out of garage. Rather than slowly back out (as was done hundreds of times) the car immediately accelerated and rapidly gained speed. 4. The brake was applied to stop the car but could not overcome the acceleration (pictures of skid marks were taken). 5. In order not to directly hit the wall located across from garage, car steering wheel was turned to minimize any direct contact ( skid marks will show turn). 6. Car came to a stop when it hit the wall causing significant damage to the car and causing damage to the wall (pictures can be forwarded).

While on a two lane road, my car decided to go around the car in front of me into on-coming traffic while in full self-driving mode. I had to jerk the car to the right to prevent a head-on collision!!!! I missed the on-coming vehicle by seconds!!! this was terrifying!.

In fsd mode, my Tesla Model Y always heads to the "do not enter" road and I have to take over manually to prevent entering the "do not enter" road. This has happened almost all the time I am there. This is a very unsafe. Tesla needs to correct this issue at their highest priority.

I have had multiple incidents of "curvature assist active" message appearing on screen while on cruise control. It suddenly reduces the speed of the car. This happens on a straight road with no curves or slope. It also happens at random. On the same stretch of road at the same time of the day, this issue pops up sometimes and doesn't on other times. Every time this comes up, the car reduces speed suddenly. For example, I go from 45 mph to 23 mph in a few moments. If there is a lot of traffic behind me and the car behind me was not expecting such a sudden decrease in speed as there is no obstruction in front of me, this could lead to a safety issue. I took the car in for repair. The technicians could not find out what the issue was. They said they recalibrated the sensors and test drove and did not see this occur. As this is occurring randomly it might not have shown up when they test drove. But, it happened to me when I took the car back and it keeps happening randomly at least twice a day. There is no specific location and/or time of the day. Tesla doesn't provide an option to disable this "curvature assist" feature for something so basic as cruise control. Along with this I have had 2 incidents where my car applied brakes suddenly when there was no obstruction in front of me. In both incidents, I had to immediately take over and speed up to avoid any issue with traffic behind me. If there is any safety incident due to these issues, Tesla will have to be held liable.

It is impossible to disable automatic emergency, breaking system permanently. The vehicle brakes strongly and abruptly causing the cars behind to slam on their brakes and potentially cause accidents. Every time I disable it, it comes back on next time we get into the car. There has been several instances where the vehicle hit the brakes really hard, even if there was nothing in front of it. . I was told that this is happening because Tesla does not use sensors but realize on cameras for these features and it can be quite wrong. I don’t know how to drive this car safely because the car makes decisions for me. Since it happens all the time, I’m having to keep my foot on the gas, and when it slams on the brakes, I counter it by pressing the gas pedal. The incident date is just an estimate, but it happens all the time.

On or about may 23 or 24, 2025, while using fsd to park the vehicle, I engaged reverse mode. The vehicle was fully under fsd control during this maneuver. Unexpectedly, the car reversed into a fixed pole, impacting the rear of the vehicle and causing a noticeable dent. The system did detect the collision and stopped upon impact, but failed to avoid it entirely. This incident occurred despite my hands being on the wheel and full attention as a supervising driver, in accordance with Tesla's guidelines for fsd use. I believe this represents a malfunction in the fsd system's object detection or path planning during reverse parking.

While driving westbound on lee jackson memorial highway (u. S. Route 50) after passing the intersection with stonecroft boulevard in chantilly, virginia, the autopilot system on my Tesla Model Y malfunctioned. Without any warning or obstacle in my lane, the vehicle suddenly and sharply veered to the right, directly toward two vehicles traveling in the adjacent lane. I was holding the steering wheel at the time and was able to immediately countersteer to prevent a collision. There were no audible or visual warnings from the vehicle before or during the incident. The autopilot system did not display any messages or alerts, and no braking or turn signal was engaged by the system. The lane shift was abrupt and uncommanded. The dashcam footage clearly captured the incident, and it is available for inspection upon request. To my knowledge, the issue has not yet been reproduced or inspected by the manufacturer or service center. The vehicle has not been examined by police, insurance representatives, or others at this time. This unexpected maneuver created a serious safety risk for myself and nearby drivers.

I was trying to reverse the car from my garage. I turned on the engine and put the vehicle in reverse gear. The vehicle just zoomed out of the driveway leaving me without the ability to control it and hit a tree on a neighbor's house and stopped. Then I tried to bring the car into the garage by engaging the drive gear. Again, the vehicle zoomed into the garage, hit a few objects in the garage and stopped. At that point I just turned off power and walked out. I took pictures of the damaged parts. At that time, I only noticed damage to the rear on the driver side and the front on the driver side. When a tow-truck came a couple of days later, I noticed damage on the front on the passenger side also. When the incident happened , the street was empty and luckily no one (including me) was hurt n.

I took delivery of the Tesla Model Y yesterday (12/24/2024). The car has 73 miles on it as of now. First, the rear view camera stops working this morning (12/25/2024) and parking assistant is not available. Then the autopilot won't turn on and the car shows an alert that "power limited". After I arrived home from a supercharger (the car is charged to 80% as of now) around 1pm, the screen turns brick, and it will not turn on again after rebooting. It can drive, but the power feels weak. I called Tesla roadside service. The car has been towed to the fresno service center.

The automatic pilot computer (ap4) failed on my 2025 Tesla Model Y after approximately 400 miles. This controls a lot of the vehicle's auto pilot features but it also controls a lot of its safety features, such as the back-up camera, forward collision warning and blind spot warning. As of 19 December, the Tesla service center has had my vehicle for 14 days with no fix for the foreseeable future.

Safety is the first think that I believe.

On or around December 1 2024, the * computer** in my 2025 Tesla Model Y shorted out, causing a **complete failure** of all systems controlled by this computer. The following safety-critical and driver-assist features have become *-functional**: 1. **cruise control** (adaptive or otherwise) 2. **forward collision warning** 3. **lane departure warning** 4. **lane keeping assistance** 5. **blind spot warning** 6. **parking collision warning** 7. **full self-driving** and **auto park** features 8. **cameras** required for autopilot functionality additionally, because the * system has failed**, the vehicle’s **navigation system** is inoperable. This impacts Tesla’s unique route planning feature that **sets up supercharger stops** during long journeys. Without a functioning navigation system, I cannot properly plan my travel or locate charging stations, which severely affects the usability of the vehicle. **safety concerns:** the failure of these systems, especially safety features like forward collision warning, lane keeping assistance, and blind spot monitoring, puts both the driver and others on the road at risk. Losing access to safety-critical functions after an update is unacceptable and poses a serious danger to vehicle occupants and surrounding traffic. **incident details:** • the issue occurred **immediately following a software update**. • Tesla pushed the update **remotely** without providing any warning or indication of potential risks. • the failure appears to be related to a hardware short in the * computer**, directly caused or exacerbated by the update. **desired outcome:** • a thorough investigation into Tesla’s software update process and its effect on vehicle hardware and safety systems. • a resolution that prevents similar failures in other vehicles and ensures system updates do not compromise vehicle safety or critical functionality.

We were driving east on I-40 at mile marker 245 Friday Nov 29 2024 around 8:50am in the right lane. We were passed by a gray Ford f-150 on the left. We had the "traffic aware cruise control" enabled. Our Tesla braked hard when the f-150 was directly beside us. The Ford was not in our lane at any point, and never changed lanes. Luckily a car behind us was not following too closely or an accident could have happened.

2025 Tesla Model Y cameras and sensors all stopped working within 700 miles driven from brand new. Affected systems included all cameras, including backup camera, as well as gps navigation, with the gps system believing the vehicle to be static at a Tesla facility in California. This not only prevented the self-driving and navigation from functioning, it caused numerous safety features to be disabled including (mandatory) backup cameras, collision-avoidance system, lane-departure warning system, cross-traffic alert system, rear collision avoidance system, and automatic safety braking. Upon reporting to Tesla, was told a "new component" was required, which later was told was a new computer. The manufacturer initially set a date 2 weeks in the future for a repair; then they pushed it a month; then tried to push it another month before I pushed back. This resulted in it being taken in earlier than the repair date. The vehicle is still awaiting repair. There were no warnings of this failure, it simply all happened at once. Upon confronting Tesla service with this being a known issue [xxx] ) and requesting a loaner for the meantime, they eventually found one, but only after great protestation and pushback, with eventual threats of legal action leading to a more personal touch. This is clearly a known issue which they are downplaying. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).