Tesla Model 3 adaptive cruise problems

Filed Oct 4, 2026 · Brakes, Driver assistance · NC

Urgent Safety Concern — Uncommanded Braking During Manual Driving. On October 2, 2026, while driving my 2021 Tesla Model 3 Standard Range manually at approximately 45 mph and slowing to make a turn at an intersection, my vehicle unexpectedly applied very strong braking for approximately 1–2 seconds before releasing. Neither Autopilot, FSD, nor Traffic-Aware Cruise Control was engaged. I am concerned about a possible unintended Automatic Emergency Braking activation or braking-system malfunction. This creates a serious safety concern for my family, including our newborn child. I request that this be urgently reviewed and determine what triggered the braking, including whether AEB, ABS, or another braking-control system intervened in suck similar cases, so many were reported online. Please also provide the diagnostic findings and a written assessment of whether the vehicle is safe to operate.

Filed Sep 12, 2026 · Acceleration · CT

When using Tesla's Full Self Driving (supervised) speed control is erratic and not subject to the driver's control, such as it would be when using adaptive cruise control. As a result, the available speed modes (sloth, chill, standard, hurry and Mad Max) can cause the vehicle to dangerously exceed speed limits and at times to drive well below the posted speed limit, causing confusion and frustration to following drivers. There is no reason why the software cannot be changed to a safer method that would permit the driver to select the speed at which the car will travel, i.e. the speed limit, similar to adaptive cruise control found in most modern vehicles. When the operator of a vehicle is not in charge of the vehicle's speed, this is inherently dangerous.

Filed Sep 10, 2026 · Driver assistance · PA

Interior camera circuit failed in the main computer as diagnosed by Tesla, it disables most safety features of the car, no collision warning or avoidance, no automatic emergency breaking, no lane departure warning or correction, no reverse cam, no cruise control or self driving, and probably more. Only Tesla can replace it because it's vin matched to the car, for $2400. This part should be more durable

Filed Sep 8, 2026 · Driver assistance · CA

Most recently, on or about 09/05/2026, driving on the freeway at about 65 mph with the sun directly in the windshield, the car suddenly issued an urgent take-over-immediately alert and Autosteer disengaged with no advance warning. My 2025 Tesla Model 3 uses a camera-only driver assistance system (Tesla Vision). Whenever I drive toward a low sun - at sunrise or sunset - the forward-facing cameras behind the windshield are washed out by glare. The vehicle displays a camera blocked/blinded warning, and Autosteer and Traffic-Aware Cruise Control disengage and become unavailable while the car is moving in traffic. The handback is abrupt: the system does not warn me that it is losing visibility until it has already quit. This is fully reproducible whenever my direction of travel puts the sun low and straight ahead. The windshield is clean, including the inner glass in front of the camera housing, and the factory glare shield is intact, so this is not dirt or an obstruction - it is a limitation of camera-only sensing. There is no action an owner can take to prevent it. Tesla removed radar from these vehicles in 2021, leaving cameras as the only forward sensor. I believe this is the same defect covered by the federal safety agency investigation EA26002 (upgraded from PE24-031), concerning the failure of Tesla's FSD/Autopilot to detect and respond to reduced roadway visibility caused by sun glare. I am filing so that my vehicle is on record in that investigation. No crash, fire or injury has occurred. The risk is an abrupt loss of driver assistance at highway speed, in exactly the conditions where the driver's own vision is also degraded.

Filed Aug 27, 2026 · Acceleration, Brakes · GA

On XXX at around 3:30 PM EST, I was driving my 2023 Tesla Model 3 on [XXX] about 10 miles outside of [XXX]. I had the adaptive cruise control set at 75 mph. I was driving in the right lane of the two available lanes of travel in that direction. I noticed an unattended car on the right shoulder about a 1/4 mile up the road and continued my drive as normal. The car was at least 5' to 6' off the highway. As i got about 30 yards from the car, my car suddenly slammed on the brakes automatically, which forced me to react in a corrective manner. Thankfully there was nobody behind me or the severity of the braking would have likely caused a rear end collision. To my understanding, this phantom braking is a known issue with Teslas, so I wanted to document my experience to add to the record. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Aug 20, 2026 · Driver assistance · NY · crash · 1 injury

Adaptive cruise control was on, i was driving on the highway, traffic was speeding up and slowing down, and the tesla was braking accordingly. I was paying attention to the road and noticed, all of a sudden, that the tesla was not braking as traffic in front of us slowed. I immediately slammed my foot on the brake as hard as i could, yet there wasn't enough time or distance, and my car collided with the one in front of me. I wasn't injured, but there's a chance someone in the other car was. The emergency brake did not kick in whatsoever, and the adaptive cruise control completely failed, leading to an accident.

Filed Aug 19, 2026 · Driver assistance · SD

Driving on a 2 lane road going 65 with Traffic-Aware Cruise Control enabled at 65 MPH with a car behind and no car in front of us. the car phantom braked for no reason going from 65 to 40 mph in a matter of seconds. Luckily we were able to accelerate to avoid being rear ended

Filed Aug 16, 2026 · Driver assistance · MA

After Tesla pushed software update 2026.20.6.11 or “FSD 14 lite” the self driving feature stopped functioning. Also all of the driver assistance safety features stopped working at the same time, forward collision warning, emergency braking, lane keeping assist, adaptive cruise control, blind spot detection have all stopped working as well. It appears one of the two “self Driving” ECU was damaged or disabled by the update. Without these features the drive is not notified in advance of a collision and the emergency braking does not function to stop the car. The car is awaiting inspection and repair by the manufacturer.

Filed Aug 9, 2026 · Driver assistance · UT

Two separate incidents occurred on July 10th and July 12th 2026 involving adaptive cruise control. While adaptive cruise control was engaged my car slammed on the brakes for no reason. There was nothing in the roadway to cause abrupt braking. The second time it occurred my car was close to being rear ended by a vehicle driving behind me. I took the car which is still under warranty to Tesla who confirmed there is a known firmware issue. No time frame was provided as to when the issue will be fixed.

Filed Aug 7, 2026 · Steering · NJ · crash

On July 18, 2026, at approximately 10:00 AM EST, my son was manually driving a 2024 Tesla Model 3 at approximately 26 MPH when the steering suddenly became extremely stiff and difficult to turn. He attempted to steer away from a roadside barrier but was unable to turn the steering wheel sufficiently, resulting in a collision. There was no warning or indication observed on the dashboard before the steering suddenly became extremely stiff. Autopilot, cruise control, and Full Self-Driving were not activated; the vehicle was being driven manually. Fortunately, my son did not sustain any physical injuries. However, a sudden loss of normal steering control is a serious safety concern and could potentially cause severe injuries to the driver, passengers, pedestrians, or occupants of other vehicles. After the accident, the vehicle was towed to the insurance-designated facility and is currently being examined by the insurance adjuster. Within a few minutes of the accident, the vehicle also became completely locked, preventing us from retrieving personal belongings. I previously reported this incident to the federal safety agency under complaint number 11751698, but all required documentation was not available at that time. I am therefore submitting the complaint again with the additional information and documentation now available. I respectfully request that the federal safety agency investigate this incident and determine the root cause of the sudden steering stiffness and whether there is a safety-related defect or condition that could affect other vehicles.