2023 Tesla Model 3 Driver Assist & ADAS Problems

The Full Self Driving (Supervised) system (FSD(S)) failed by running a red light. Video is available for inspection upon request. My safety was not at risk - this time - because the system waited until there was no cross traffic to resume motion, even though the light was still red. I have not tried to reproduce the problem for a dealer since it happens infrequently. (This is the third time in perhaps 6 months of subscription to TESLA's FSD(S). TESLA has not informed me of any inspections they have performed, even though they have been notified through the channel they provide. There was no indication from the car that it perceived any failure. It stopped only when I applied the brake. Prior symptoms include two previous incidents of stopping for a red traffic light, waiting until there was no cross traffic, then resuming motion while the traffic light was red. This is the first time I thought to save dash cam video.

In autopilot mode on 1/28/26 the vehicle without any warnings went through a red light causing an accident. A week prior it failed to adjust speed in a 35 mile per hour zone maintaining 71.

While driving at highway speed under normal operating conditions with the accelerator engaged and no braking input, the vehicle suddenly experienced a sustained 6-minute-12-second ADAS/EDR degradation cascade. This included OVERHEAT_PROTECT_FANONLY activation, repeated AEB_CAN_STATE_UNAVAILABLE toggling, FAULT 14.0 brake-signal mismatch, impossible negative brake pressures, and 27+ ABS/EBD/ESP fault-lamp cycles. No warning lamps, messages, or alerts appeared prior to the cascade. The degradation resulted in loss of braking assist and stability control functions, causing two collision events (right-side T-bone impact followed by curb strike) despite no driver error or input. This failure mode matches the exact ADAS/EDR degradation pattern under active NHTSA Engineering Analysis EA26002. Full technical details, timestamps, fault logs, sampling gaps, and EDR data are provided in the attached narrative PDF and supporting CSV files.

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.

The Tesla ran a red light on two separate occasions while in full self driving mode. The first time it went through without me being able to intervene. Given it had done it before, the second time I was able to stop it. Both times occurred at the intersection of [XXX] and [XXX] . It has not done it at other intersections. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

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.

Description of Problem: While driving under normal highway conditions on July 2, 2025, my Tesla suddenly and violently phantom braked — meaning it rapidly and without cause applied the brakes forcefully. There were no obstacles, vehicles, or hazards present. The sudden deceleration caused a severe flare-up of a recent cervical disc replacement surgery I had undergone. I experienced extreme neck and spinal pain and had to seek emergency medical attention. I am now under medical supervision, on pain medication, and unable to work. I contacted Tesla requesting the logs from the incident and have received no response. I’m deeply concerned about the safety of this vehicle and the lack of accountability for this known and previously investigated issue. I am in the process of retaining legal counsel and intend to pursue this further as a product liability and injury case.

Curvature Assist feature agressively brakes while driving at highway speeds. This is supposed to slow down for curves, but frequently intervenes for straight, clearly marked lanes. Feature cannot be turned off. Drivers behind me have gotten agitated several times for the sudden, harsh braking, and I do not feel comfortable driving this car.

When traveling on an interstate highway with a speed limit of 65 mph, with navigation system operating and with TACC engaged, the system sometimes resets the maximum speed to that of the speed limit of the exit ramp (usually 40 mph) when I am NOT exiting the highway. This results in rapid deceleration significantly below the prevailing highway speed with the potential of causing a rear end collision from following traffic. This is consistent some certain exit ramps along I-93 in NH, and is prevalent when traveling in the right traffic lane.

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.

model 3 self deleted after failing to maintain lane and crossed the white line, and off pavement, into eroded ditch.

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.

The contact owns a 2023 Tesla Model 3. The contact stated while driving approximately 72 MPH with the cruise control activated, the vehicle abruptly decelerated and nearly came to a complete stop. During the failure, there were no other vehicles or objects nearby. The cause of the failure was not yet determined. The local dealer was notified of the failure, but no assistance was offered. The manufacturer was not yet contacted. The failure mileage was 6,730. The contact stated the primary concern is that unexpected emergency braking for no apparent reason on our 2023 Tesla Model 3 was dangerous. The dealer indicated that their review of the data for the approximate date and time did not show anything and cancelled the appointment.

Tesla Motors has two self-driving features, a mode they call enhanced autopilot and Full Self-Driving. Enhanced Autopilot is used primarily on freeways, and allows the car to switch lanes without driver's assistance, while maintaining the speed of traffic. Full Self Driving is a separate system in and of itself that relies on far more sensors, and is far more complex, as it needs to be in order to handle all the nuances of allowing a car to drive itself on and around city streets. During the month of April ,Tesla previewed the supposed improvements in its full self driving mode by releasing it to everyone for free for that month. I was exiting the 101 freeway in Los Angeles, utilizing the enhanced autopilot feature to navigate myself to my destination. At this exit, the car makes a right on Main St, drives downabout 500 feet and then makes another right so that you're briefly traveling underneath the freeway from you'd just exited. As the car made that second right, while on what should have full self-driving mode, the car failed to navigate the angle of that turn and ran right into a steep curb at a fairly fast speed, destroying the right drive train, the right tire, the entire front bumper, and the cars wheel chassis and suspsnesion system all still have to be fixed. I believe the malfunction was caused by the car failing to properly switch vbetween enhancd autopilot and full self-driving if they utilize GPS to mmake that determination, because it felt almost as if the car was trying to switch into the lane to the right (which didnt exist there was the curb there) and not like it was attempting to negotiate or preparing to make a wider turn maneuver. I don't believe it even decelerated as it hit the curb. I broke my toe but otherwise am all right. Tesla won't honor their warranty and is threatening to repo the car they won't fix.

The adaptive cruise control of the Tesla Model 3, like other Tesla models, rely on the cameras for determining speed. While driving on the freeway the Tesla Model 3 began to abruptly break almost causing a car to rear-end me. This has occurred multiple times since the full self driving was released to everyone. I discovered that the software reads the freeway's "Minimum Speed Limit" signs as the maximum speed limit. I reached out to Tesla and was told that there would be a firmware up-date but one has not come out since.

Using the Tesla "Autopark", the car backed right into a pole in back of the parking space. When the car hit the pole, it kept trying to back up rather than disengaging. It was a clear day, there was no traffic and there was no car in the adjacent parking space. This is using the latest version of Tesla's self-driving software, 12.3.3.

The car phantom brakes constantly (at least every 10 miles) when using cruise control. You will be driving highway speed and the car will slam on the brakes for no reason,, making the cruise control dangerous and unusable

Tesla autopilot drifted over two lanes and into the side of a semi-truck on the freeway. It was night time but with plenty of light, no rain, and clearly marked lines separating the lanes. Not only did autopilot fail, but the features to help avoid drifting out of a lane even when not using autopilot, also failed. Those features are supposed to auto-steer back into the lane and beep to alert the driver. None of this occurred. 1. Yes vehicle is available for inspection upon request 2. Could have easily led to extensive damage, injuries or fatalities. Everyone got lucky 3. Problem has not been reproduced by dealer, but I have video of the event 4. Vehicle has not been inspected by any 3rd parties

The Autopilot feature of my Tesla Model 3 was safe and effective prior to the update mandated by NHTSA. With the recent update, I now receive multiple warnings during my drive on a daily basis for checking my mirrors or adjusting the radio. These are loud and startling. This update was completely unnecessary and counterproductive to my safety. I'm sure some Tesla drivers drive recklessly, but it makes just as much sense to require ICE vehicle manufacturers to install hardware/software to prevent drivers from doing donuts. Please reconsider the "recall" you mandated of Tesla. It was unhelpful. Respectfully, [XXX] Palmdale, CA INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Repeated "phantom braking". With cruise control engaged and zero traffic in front of the vehicle, false readings on the collision detection system will cause strong, sudden, and unpredictable braking. Highly unsafe particularly in conditions where there is traffic behind the vehicle. In my first 900 miles of driving the vehicle there have been 20-25 of such incidents. When triggered, breaking force is strong and deceleration is sudden.