During the time we have owned this car, it exhibits random and sudden deceleration events when operating AutoPilot (adaptive cruise control) on highways and freeways. The events are not explainable by presence of any notable present or potential hazard. The risk presented to and by surrounding (following) vehicles is so significant that it renders this function unusable. Saturday, April 1, was the last time this occurred before we decided we could no longer safely use this function, instead going to full manual control of the throttle and brake for all highway driving.
2021 Tesla Model 3 driver assistance complaints
Page 5 of 16: complaints 101 to 130 of 431, newest first, as owners wrote them.
there were 2 phantom braking incidents today traveling between pasadena and berkeley onhighway 5. it was getting cloudy. the first incident occurred just after i passed under an overpass, and thought it might have been due to the lighting. the braking was mild . there were other cars passing me on the left. i had the cruise control set to around 74mph. i probably slowed to 65mph the second phantom braking incident was about an hour later, and it was HARD. fortunately the cars behind me were far enough away. the cruise control was also set around 74mph. interestingly, no audio alerts were issued with either incident. normally, when driving without cruise control, the car will issue audio alerts (loud, urgent beeping) if a car gets too close. in both of my cases, there were no cars in front of me as i was in the slow lane.
The car will apply the brakes suddenly when in control when there is no obstacle to be avoided.
When driving on the highway on autopilot (not full self driving or enhanced auto pilot), the vehicle will experience “phantom braking” where it will suddenly brake with full regenerative braking force without any perceivable reason/cause. I have noticed this event occurs every time at the same location as it is on my commute to work. I’ll be on the highway with my speed set to around the speed limit of 65mph in autopilot mode, and when approaching the merge of a specific on-ramp, the car’s set speed will suddenly change from 65 to 55 and then the full power of regenerative braking is applied until I manually disengage them. There can be no vehicles around me or any logical reason for it to brake, and it will do so anyways. This is a safety concern as a vehicle following behind me may not anticipate a random and hard braking event for no apparent reason or cause to do so. The car acts if the speed limit decreases, which it doesn’t, and then its reaction is to brake very very hard and abruptly. If I don’t manually disengage the brakes, I’m not sure if it would come to a complete stop on the highway or just brake until a certain speed is reached. This phantom braking event has occurred in other areas as well, but I have noticed it always happens at this one specific location every day. There are no speed limit signs/changes in the area.
My model 3 on crusing speeds on high ways, automatically applies brakes and makes sudden,abrupt, jolted slowing down which causes extreme pressure on persons body
The car suddenly braked hard when there were no obstacles or other reason. If someone was behind me I would have been hit.
Car put on brakes unexpectedly during use of adaptive cruise control (autopilot). This phantom braking happens often at highway speed. Bug reports have been sent from vehicle to Tesla
While driving on the interstate I was using Autopilot (cruise control). I started into a slight curve when the vehicle suddenly emergency braked. The roadway was clear and thankfully no vehicle was following close behind me. Also there was no warning alarms, just a sudden, aggressive braking. This has happened several times before but the first time with no alarms beforehand.
My operating my Model 3 in autopilot mode, there is one particular location that my car "phantom brakes" every time I pass. I travel this location an average of 4 times per week. I have been reporting the phantom braking to Tesla for almost two (2) years and they still have not fixed the problem. They claim the car is doing what it is supposed to do. The phantom braking occurs on a divided highway on an overpass that passes over a highway with a lower speed limit ( 37° 4'54.40"N 94°18'48.09"W). It only occurs in the east bound direction. Tesla says their mapping information is provided by Google and until Google updates or corrects their mapping data, the problem will persist. On a day with no traffic behind me, I did not intervene and allowed the car to brake as it saw fit. I went from 70mph to 40mph all while in a 70mph zone. As I have mentioned, I have been telling Tesla about this since March of 2021 yet it is not resolved.
I was driving Tesla on the freeway using adaptive cruise control at 65 miles per hour and the car suddenly brake and the sped jumped from 65 to 20 in seconds. It was scary. There was no one in front of nothing in the road to cause that to happen. It did say on the screen something about visibility. I had to take control of the car after. It has happened several times before. When I spoke with Tesla they said it’s a safety feature and it only happens when you pass certain cities. I find that hardly true
I was driving with the Autopilot on, traveling about 65 mph on the freeway when the automatic emergency braking system kicked in for no reason. There was absolutely nothing in front of the car when it aggressively braked, very suddenly. I was very lucky no one was behind me. I have not reported this directly to Tesla, no one has inspected or confirmed this event.
This incident happened last summer, 2022 but I recently read that it is happening to many other people and thought I should report it. I was driving on Hwy 71 south in the Cincinnati area with the ADAS with the cruise control and auto steering in operation. All of a sudden the brakes slammed on with me not doing anything to cause it. There were no cars behind me and I touched and released the brake pedal and it went back to a normal driving mode. I don’t believe I hit a pothole or bump on the highway. I did not report it to Tesla.
Tesla software release 2022.44.25 My Tesla autopilot continues to exhibit phantom braking while in traffic aware cruise control and autopilot. The vehicle will suddenly slow down either gently or harshly. This behavior was observed after Tesla released software that disabled the cars radar. Since then, multiple updates have remedied the issue but 2022.44.25 has introduced phantom braking again. No accidents have occurred but luckily I live in a remote area of Arizona and can take control of the car as it phantom brakes. After Tesla working in autopilot for years, I think it’s time for additional validation to start happening on autopilot and traffic aware cruise control. I’m also of the belief that normal cruise control should be banned. Thanks!
While using the base level of "autopilot," remaining in a lane and maintaining speed, the car will randomly slam on the brakes even when there are no vehicles or objects in front of it. The first incident occurred while driving late at night on an interstate. There were no vehicles in front of the car, but it rapidly reduced speed from 75mph to 30mph, before immediately speeding up again. The camera based "autopilot" is essentially useless and I have decided not to use it when driving.
Twice in October 2022 (18th and 20th), my vehicle decelerated suddenly during cruise control with no impediments in the road (i.e., phantom breaking). The breaking on the 20th was akin to slamming on the breaks, and both occurred at freeway speeds. I did *not purchase Tesla's self-driving feature. The vehicle also on the 18th tried to steer around an object that did not exist in the road while I turned onto a freeway on-ramp. I reported all three incidents at that time to Tesla for servicing of the vehicle. It is unknown whether any "repair" was actually done to eliminate phantom breaking (I no longer use Tesla's cruise control in similar traffic conditions which were at the time crowded outside of the carpool lane I was using).
On 1-14-2023, while driving westbound on I-64, around sunset (5:20ish pm) in a straight portion of the highway, the vehicle suddenly braked for no reason. There was nothing in the road and no cross traffic. There was an all white semi in the right lane that I was approaching in the passing lane. I immediately disengaged the cruise and continued my trip with no further incidents.
The only cruise control feature available on this car is the adaptive cruise control. This car continues to make sudden unsafe braking maneuvers for no reason. It seems to get confused by steep hills, bridges, shadows, and other factors. You can be on a highway going 70mph and it will slam the brakes, terrifying passengers and potentially causing you to get rear ended. This has been ongoing since the purchase of the car 1 year ago.
Trip from Piedmont, California to Salt Lake City, Utah, I experienced three (x3) phantom breaking incidents at over 80 mph on interstate 1-80. The car without warning dramatically de-accelerated from approximately 85mph to 65mph or 60mph without warning and suddenly. Dog was riding in back and thrown into front dashboard on one occasion. Visited Tesla dealership on State St in Salt Lake City Utah upon destination arrival and manager/head at front desk laughed indicents off saying, "we've heard of such incidents just wait for the software update." Horrible. Beyond dangerous. I can report that in all three incidents there were no cars in front or behind me and the phenonenon occurred totally unexpectedly. Reported it also to Tesla repair shop in Berkeley, California, and intake group had zero sympathy and said, "it's a known software glitch."
While driving on an otherwise unobstructed road, with no nearby obstacles on a Rural South Dakota Interstate, the vehicle suddenly slammed on breaks in an unsafe fashion, forcing the vehicle behind us to swerve to evade our car. We were told by Tesla service that sometimes, "road shimmering" can cause this behavior, and there is no remedy available. In response to this, I gunned the accelerator to try and remedy the issue, hitting unsafe speeds before being able to fully return control to the vehicle. This was NOT while using the vehicle's autopilot system for FSD (which was available on the car), but adaptive cruise control, though the same issue happens with FSD regularly. This is not the first instance of this happening (I have stopped using cruise control and FSD on the vehicle since), but the first time it seriously endangered myself and another driver.
On multiple occasions, the car will suddenly decelerate while using adaptive cruise control on the highway. Malfunctioning component: adaptive cruise control. Safety: rear end collision if another vehicle was following too closely. Manufacturer is fully aware of the problem.
I was going 80mph on the interstate coming back from Little Rock to Tulsa. The time was 4am in the morning with little or no traffic on the road. I was using only the cruise control with adaption turned on. The car all of a sudden without any warning almost came to a complete stop on the interstate. I later asked what caused this and was told it is phatom braking but this was VERY dangerous, if someone had been behind me they probably would have been messed up. I merely accelerated to make sure I was at least keeping the minimum speed limit. Please advise. Shawn
Adding our vehicle to the list of those affected by what seems to be commonly known as "Phantom Braking". The most recent occurrence was on Interstate 25 southbound in northern Colorado when the "Autopilot" (Adaptive Cruise Control) suddenly braked and reduced our speed from 75 to 51 mph, with no vehicles or other obstructions visible. We were almost rear-ended by a car following us, however. I want to point out that this was only the worst example of several episodes that occurred that day, and on earlier dates as well. We no longer use Autopilot, which makes long trips much less comfortable. I also want to mention that our vehicle does NOT have Tesla's "Full Self Driving" (FSD) installed, so my hands were on the wheel at all times.
On certain sections of highway unsuccessfully attempted to activate auto-steer (two down clicks) multiple times in a row. Did this multiple times in a row but was unsuccessful to activate auto-steer. Instead a supposed "easter egg" (which activates with 4 down clicks) very loudly plays loud jarring music (called "rainbow road")...this is NOT FUCKING FUNNY--I nearly ran my car off the road and into oncoming traffic. Giant 2000 pound hunks of metal going at 60 mph should NOT FUCKING COME with special surprises. This is incredibly dangerous and jarring to drivers.
The contact owns a 2021 Tesla Model 3. The contact received notification of the federal safety agency Campaign Number: 22V235000 (Electrical System, Forward Collison Avoidance) however, the part to do the recall repair was not yet available. The local dealer was contacted. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The manufacturer was made aware of the issue. Parts distribution disconnect.
Random "phantom braking" while using autopilot or cruise control. Causes the car to slam on brakes and has lost control once almost causing me to go off the road. Also, has brake-checked many cars that follow behind me while I'm using autopilot or cruise due to the phantom braking. Also Tesla Repair center in Chicago replaced my front bumper with a discolored front bumper that had the same issue of peeling on the inner edges of the bumper as the prior front bumper. When I brought up the issue to Tesla they said that was a manufacturing process issue due to the molding process of the bumpers and that is how they all are. If that is the case why change the bumper? Could have just told me that's how all the cars are and saved a lot of my time. Also, have had many repairs from Tesla that don't seem to end. These cars arent being produced in a consistent manner. What was promised during the purchase of the car doesn't seem to hold up.
The contact owns a 2021 Tesla Model 3. The contact stated that while driving at various speeds, the vehicle experienced phantom braking. The contact stated that the adaptive cruise control was activated during the failure. The failure recurred several times. The vehicle had not been taken to the dealer to be diagnosed or repaired. The manufacturer was not made aware of the failure. The approximate failure mileage was 14,169.
I believe that Tesla's autosteer and Full self driving features are improperly designed. I will speak to them as if they were one and the same. I noticed that you have a check box for Lane Keeping Assistance above, but there is no checkbox for coercive auto steering, which is Tesla's product. The only ability it offers as far as steering the car is to forcibly disengage the autosteering feature. This is not assistance and this is the problem. A properly designed Lane Keeping Assistance feature continuously monitors driver steering action, lane position, and traffic conditions. If the Lane Keeping Assistance system finds itself 'alone' with little or no measurable input from the driver, action is called for. With the Tesla, the feature has an embarrassingly stupid 'driver attention check' which, until recently, could be easily defeated by the simple addition of a weight to one side of the steering wheel or the other. In a misguided attempt to correct this ridiculously poor design, they have recently made matters much worse. Now they distract the driver's attention from driving by forcing the playing of some sort of 'patty cake' type game, which does prove alertness of the driver, but detracts from the real and necessary work of circumventing the actual threats encountered in everyday driving. In short, a proper Lane Keeping Assistance feature should not be totally ignorant of the driver's subtle driving moves (it's an excellent feature as long as autosteering isn't engaged) and should honor requests to move into different parts of the lane long before disengaging, and no attention measuring system should come at the expense of driver awareness of actual issues. I have tried through email and phone to convince Tesla that something needs to be done, but have received no response from them.
While using cruise control on a cross country drive, there have been numerous instances of phantom braking in my Tesla Model 3 SR+ (2021). This has been occurring during both day and night driving on the highway, at speeds of 65-75mph. It appears to happen most frequently when there’s a slight up-hill on the highway followed by a slight downhill and then phantom brake, but there have been instances on flat highway road at night with phantom braking taking place.
I have had the car for about 1.5 years. In the last week it has started to have phantom braking where on a clear, flat road with no traffic, it suddenly has hard braking and slows from about 65 mph down to 40-50 mph. This has occurred when operating on Autopilot with the cruise control and autosteer on. There is a risk of a rear collision with this sudden braking. There was no warning. I do not have Full Self Driving.
Model 3 sudden Max speed reduction (60/55 to 25/30) when using Autopilot. This happens every time and in multiple areas when driving on I-4 through Orlando, FL.
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