Adaptive Cruise Control problems of the 2026 Tesla Model Y

Tesla fsd v14. 1. 3 feels unsafe for the typical “average” driver because it no longer allows users to set a maximum speed limit offset when using the standard driving profile. In fsd v13, drivers could specify a max speed offset—such as 10% or 15% above the posted limit—when fsd was enabled. However, this option is no longer available in fsd v14. As a result, fsd v14 in the standard profile often speeds on highways and makes aggressive lane changes to pass slower vehicles. This behavior feels unsafe and stressful for most everyday drivers. Tesla should restore the ability for each driver to set their own comfortable max speed limit and reduce the aggressiveness of lane changes.

Tesla fsd issues: 1. Phantom braking sudden to a full stop for no known reason in the middle of the road, throwing my dogs into the floor and the car stopped completely on the highway. If an infant had been in the car ina car seat, their neck could have been broken 2. Sudden jerkiness when making turns 3. In one case the car suddenly changed lanes and was a close encounter. 4. Fsd system is now completely non-functioning. 5. These issues started about about 1 month ago and worsened in the past 1 week after the latest software update. Tesla premium connectivity navigation issue 1. Instead of taking me on main roads to my destination, it has been taking me down rural, isolated dirt roads. In one case I was directed to a dirt, logging road, isolated and dangerous terrain. I had to turn around in a secluded area and the navigation system kept directing me to dirt roads, although main roads were close by once I opened my iphone for directions. 2. In lynchburg, va the navigation directed me towards an exceptionally steep downgrade to the river and would have been a catastrophe 3. These issues started this weekend 10/24 - 10/26/25 door locks 1. Door locks respond occasionally and there have been times I left the car assuming it would lock but it had not. There is no rhyme or reason to this. 2. This issue started 10/25/25 I am following up with Tesla next but thought you should be made aware. I did the recent Tesla software update and things just got worst.

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.

Reporting fsd incident on 10/08/25 approx around 8. 15 pm I was going on I-90 towards western mass / u mass amherst using fsd on 10/08/25 on I-90 road work was ongoing and it was 2 lanes. All the vehicles started going in the right lane as left lane had cones . Left lanes cones were tapering on its way ahead. My Tesla fsd chose the left lane which I would not choose as I saw at the distance cones were tapering to form a single lane . Tesla fsd drove in left lane and as it noticed cones tapering into single lane fsd acutely cut into the right lane in front of the of the truck at a very very narrow margin . Once the right lane , fsd asked me to take control of the car. From there till u mass amherst I could not use fsd . This was scary experience. I wanted to report using voice command but I got busy . Please you must have recording of the event. No body was hurt no vehicle damage just wanted to make aware about fsd.

I would like to formally report several incidents I have experienced with my newly purchased Tesla Model Y. I acquired the vehicle on [xxx], collected it from washington d. C. , and drove it back to houston between September 20 and 21. Prior to my return journey, I conducted a test drive. During this drive, at dusk, I engaged full self-driving (fsd) mode. The vehicle stopped appropriately at a traffic light; however, once the light turned green, it moved forward but veered into the yellow safety buffer zone located between the lanes of opposing traffic. I intervened by manually steering the car back into the correct lane. A similar occurrence happened in washington d. C. While attempting a left turn under a highway overpass—the vehicle again crossed into the yellow lines. These incidents suggest that the fsd system did not reliably detect the yellow lane markers. On the weekend of [xxx], during my drive to houston, I primarily used fsd. While navigating a road construction zone, the system failed to recognize large safety cones (yellow columns) and nearly collided with them. Fortunately, I was attentive and promptly took control, braked, and changed lanes to avoid an accident. This demonstrated the fsd’s inability to identify these safety markers. On Tuesday, [xxx], I drove the vehicle to work and returned home using fsd. As I exited the highway onto a ramp merging with frontage lanes, I observed that fsd did not reduce speed appropriately and nearly made contact with vehicles on the frontage road. This indicates that the system was unable to interpret the ramp as a short section intended for deceleration and safe merging. On [xxx], while returning home in the evening after work, I used fsd due to light traffic. The vehicle navigated turns and stops satisfactorily and paused roadside before my house. When I resumed manual control to park, the vehicle suddenly became unresponsive, accelerated onto my front yard, struck the flower bed stones, information redacted pursuant to the freedom of information act (foia), 5.

Bought a brand new Model Y and I less than a week I received the below two error message warnings and the airbag light comes on. Cabin occupancy radar obstructed. Front passenger safety restraint system issue. Also to engage the fsd, I have to double tab 2-3 times in order for it to engage.

This happened after I installed the most recent software version. My wife was driving with fsd enabled when the car suddenly braked hard. A little while later, as it was supposed to make a left turn, it suddenly accelerated on its own, ignored a red light, and drove straight through the intersection. A warning light appeared on the screen, notifying her that fsd was inoperable, but it was already accelerating, so it was too late to intervene. Therefore, the car crashed with another car. My wife, mom, and my baby were in the car, and my wife got injury on her face. I have a recorded video, and Tesla should have the log for that moment.

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.

Update to odi 11678614. This problem applies to non-fsd (full self driving) Tesla Model Y cars. Tesla's manual describes autopilot as traffic aware cruise control - it's the first step on non-fsd cars. The second step on non-fsd cars, autosteer, is active lane keeping. In older ys, the first stalk pull engages autopilot, second pull engages autosteer. 2026 juniper doesn't have a stalk - a single scroll wheel press engages both. I read the 300 page juniper 2026 Model Y manual before driving it for the first time. On page 108, it lists 7 things that will cause autopilot to disengage. I presumed that comprehensive list was complete. Unable to attach. Having *autopilot* disengage when turning the wheel in *autosteer* is not listed. During my 59k miles on my 2021 model y, I used autosteer for at least 20k miles. Turning the wheel in autosteer did * disengage autopilot. In my first emergency situation in the 2026 juniper Model Y, turning the wheel * disengage autopilot, and the regen properly kicked in for the disengagement. This action came very close to causing a serious accident. My objections are 1) the action of *autopilot* (disengage / remain engaged) when the wheel is turned in *autosteer* is not documented, and 2) it's different between the old and new ys using the same current software. I understand there were problems with autopilot remaining engaged, and perhaps the change was a good idea; that's an entirely different discussion. Make the action consistent and document it and I'm happy. Summary: in heavy traffic, while on autopilot / autosteer (cruise + active lane keeping), the car beside me suddenly tried to pull into my lane. I made an emergency lane change by turning the wheel, but the cruise also disengaged, (contrary to operation in the prior model) and went to maxiumum regen braking, causing the car behind me in the new lane to nearly rear-end me. Punching the accelerator during the surprising braking avoided the collision.

I've driven my old 2021 Tesla Model Y for 4 years / 59k miles. Four days ago, I got a new 2026 Tesla Model Y. The new y has made a change to the interaction of the cruise control and automatic lane keeping. In the old one, first cruise was enabled, then lane keeping. If you disengaged lane keeping by overriding the steering wheel, cruise control was maintained. In the new y, a single selection enables both cruise and lane keeping. The safety issue is that overriding lane keeping by turning the steering wheel disengages both features at once - the old method kept cruise control enabled. I was driving in heavy traffic today on a 6 lane interstate with cruise and lane keeping enabled. The car next to me abruptly swerved into my lane, causing me to make an emergency lane change to avoid a collision. When I overrode the lane keeping to avoid the other car by turning the steering wheel, my cruise control also disengaged (unlike the old system), which caused maximum regenerative braking to kick in, abruptly slowing me in the new lane. I had to punch the accelerator to avoid being rear-ended in the new lane. This change in lane-keeping / cruise control applies to all new 2025/2026 Model Ys - the "juniper" model update. This change, according to reddit and facebook forums, seems to be universally hated and many other drivers have raised the same safety concerns. I agree with them, but didn't make a report until now because I had not yet experienced an issue where this almost contributed to a high-speed crash. Thank you.

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 incident occurred on [xxx] around [xxx] (from the dashcam footages) in a highway (don't know the place, but I have a police report). I was driving my Tesla Model Y 2026 with full self-driving (fsd v13. 2. 8) beta engaged when the vehicle suddenly off the road and hit the fence on shoulder. I retrieved dashcam footage from the incident, including footage leading up to and during the accident. The fsd system malfunctioned, the car is in a body shop and is available for inspection upon request if done quickly; huge risk to myself and others because no way know when the fsd failed; from this link, same issue: [xxx] the vehicle has not inspected by others no any warnings, the fsd had been working properly in the firt 300 miles trip; but all of sudden, swerved to the roadside with full speed. Information redacted pursuant to the freedom of information act (foia), 5 u. S. C. 552(b)(6).