2023 Tesla Model 3: adaptive cruise control problems

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 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 4, 2026 · Acceleration, Driver assistance · IL

Whilst driving on highways which feature multiple speed limits - eg. 70 cars, 65 Trucks, 60 Buses. If full self driving more or when in adaptive cruise control - the car systems fail to recognize the restriction linked to the lower speed limits. As a result, you can be driving on Full Self Drive at 75mpm, the car sees a 65 followed by a 60 speed limit (neither applicable to cars), but the car brakes hard dropping the speed from 75 to 62 almost instantly and, on more than one occasion, a closely following car has almost collided with me. Until such time as the Tesla system can recognize the 'sub text' on a speed limit - the FSD and Adaptive cruise should not be certified. I also drive a BMW i4 and this reads all signs correctly, only applying those applicable to a car to the vehicle.

Filed Sep 23, 2025 · Driver assistance · TX

While driving my Tesla equipped with Autopilot/Traffic-Aware Cruise Control, I experienced an unexpected and abrupt braking event. A vehicle had entered the center turn lane and had already cleared my lane, posing no obstruction to my path. Despite this, my Tesla suddenly applied the brakes without warning, causing a rapid deceleration that could have led to a rear-end collision had another vehicle been following closely. There were no visible hazards, warning messages, or alerts prior to the braking. The incident occurred in clear daylight conditions on a dry road, and the vehicle in the center turn lane was stationary or turning away from my lane. This appears to be a case of phantom braking, possibly due to misclassification of the adjacent vehicle or overcautious object detection by the vehicle’s Advanced Driver Assistance Systems (ADAS). This issue has occurred more than once in similar scenarios, and I believe it poses a serious safety risk. I have not yet had the issue inspected by Tesla or a service center, but I am submitting this report to raise awareness and request investigation into the reliability of Tesla’s braking logic in these situations.

Filed Jul 28, 2025 · Driver assistance · CA

Autopilot (adaptive cruise control) will freak out and slam on the brakes when a motorcycle passes by splitting lanes. This is a serious safety issue as cars and motorcycles behind me may not be able to react in time and cause a rear end collision or into the wall or vehicles next to them. It is impossible to override the braking with the accelerator as it will be too late by the time the car accelerates. Flooring the accelerator is also not a safe option.

Filed Jul 18, 2025 · Acceleration, Driver assistance · CA

My Tesla Model 3 disengaged cruise control while going 68 mph and braked hard for no apparent reason. I was driving northbound on I-405 at 3:45 a.m. going to LAX airport in the number 3 or 4 of six or seven lanes. Cruise control had been activated for at least 10 minutes before the incident at a speed of 68 mph. There was no traffic within half a mile before or after me due to the time of day. Neither my left or right foot were near either the brake or acceleration pedal, nor were they in motion. Both hands were on the steering wheel and no control was being activated. The only noticeable environmental condition is that the road surface had just changed from a dark gray asphalt to a bright white new concrete roadway. No emergency braking alert was seen or heard, so I do not think it was a false collision detection, and there was no car within a half mile. However, I do believe the severity of braking could have caused an accident if there had been someone behind me. Tesla Model 3 Software Version was v12 (2025.20.6 046c4575d120).

Filed Jul 1, 2025 · Driver assistance · CA

While driving with the Adaptive Cruise Control enabled, on California highway 5 on Aug 28, 2023, the vehicle applied the brakes very aggressively and suddenly, shy of making a complete stop, without any object or shadow requiring it to do so - known as the "Phantom Breaking". It was so dangerous that if it was a weekend with many cars behind me, I would've been violently rear-ended and perhaps not lived to report this incident. This happened twice in two hours, to the point that I have never engaged the cruise system again. The Adaptive Cruise Control (ACC) system (which is part of the Auto Pilot system) on this vehicle is dangerous and should be avoided. I wish the vehicle had the [old fashioned] non-adaptive cruise control but it doesn't. Answering the questions: Nothing failed but the ACC clearly malfunctioned since there was no object, shadow, road animal, change in asphalt color, etc. to cause it to abruptly break. It was a clear sunny day. Any accident at such highway speed could've been deadly to multiple drivers on the road. When I informed the dealer, they "verbally" acknowledged and informed me of the term "Phantom Breaking" that they had heard of the problem being reported by others but nothing to worry about and they didn't inspect the vehicle. There we no warning lamps, messages or symptoms prior to the problem. Again, this issue happened twice within a two hour period and I have not used the ACC system again. My spouse was with me in the car in both cases and witnessed the scary situation.

Filed Jun 17, 2025 · Acceleration, Driver assistance · CA

I was traveling at highway speeds on a highway with no vehicles or other obstacles in front of me. I had adaptive cruise control on. Then, the emergency brakes deployed for no reason (so called “phantom braking”), decelerating the car quickly. I turned off adaptive cruise control as fast as I could and nothing bad happened. But the situation was dangerous, as if a car was close behind me it could have rear ended my vehicle.

Filed Aug 19, 2024 · Driver assistance · FL

While using standard cruise control (without autosteer), car sporadically & aggressively brakes for no reason with no obstruction or cars ahead and while at highway speeds. With cars close behind, a serious, life-threatening accident could've occurred. Can not determine how to recreate issue on demand. This is a known issue with Teslas that has not been addressed by Tesla. I have not reported this issue to Tesla.

Filed Aug 6, 2024 · Driver assistance, Electrical · 28,000 miles · FL

The contact owns a 2023 Tesla Model 3. The contact stated while driving at various speeds with the Adaptive Cruise Control or ADAS Self Driving feature activated, the vehicle would independently decelerate without warning. During the failure, there were no other vehicles or objects nearby. The Service Center was notified of the failure through the Tesla App. The contact was informed that since a time stamp could not be provided for each failure, the Technician could not determine the cause of the failure. The manufacturer was not yet made aware of the failure. The vehicle had yet to be repaired. The failure mileage was approximately 28,000.

Filed Aug 6, 2024 · Brakes, Driver assistance · MO · crash · 1 injury

Vehicle was in cruise control, and cruise control did not deactivate causing the vehicle to propel into a building, causing airbag deployment. Safety sensors of car failed to recognize building, other vehicles, and obstructions as required.

Filed Jul 7, 2024 · Brakes, Driver assistance · ID

On [XXX], I was driving my Tesla model 3 from California to my new home in Idaho as part of my move there. During the day, I had 6 or 7 situations where the car would suddenly go into full regenerative braking, or outright apply the brakes for no apparent reason. Most of these events took place of freeways at freeways speeds, or on highways (not freeways) at the local speed limit. Every situation was when I had supervised self drive or traffic aware cruise control enabled. These situations were extremely startling and in my opinion potentially dangerous. I don't want to imagine what might have happened if one of these "phantom braking" events had occurred with a heavy 18 wheeler behind me in traffic. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)