2019 Tesla Model 3: adaptive cruise control problems

Filed May 5, 2025 · Acceleration, Brakes · OH

Phantom braking (as it's referred to by experts) happened to me twice on the highway using Traffic-Aware-Cruise-Control. Very scary. I was on cruise control going 60 mph when suddenly my car braked suddenly and inappropriately, losing at least 20 mph in a split second before I was able to slam on the accelerator and prevent an accident (rear-end collision). This happened TWICE in the course of 5 minutes on the same highway! There was no obstruction in the road, no cars moving into my lane, nothing but normal road conditions, when it occurred. From my research, this is a huge problem with Tesla vehicles that thousands of individuals are loudly complaining about online and now in court cases in the country. I see there are thousands of reports to your organization about this, but it says you have only complaints from 2021 and later years. However, I have a 2019 and it's happening to me. And it's happening to every single model year out there, just from researching and talking to Tesla owners. This is a major safety hazard, plain and simple. I was inches of being in a rear-end collision, and drivers behind me are extremely upset and vengeful on the road after an incident like this (understandably!). Because of this I fear for my safety and well-being on the road using Tesla's cruise control features. Very disappointing. Above for the ADAS option, I wasn't able to select 2 options, but "automatic emergency braking" is also applicable here as that is what happened. Somehow Teslas are falsely activating emergency braking during cruise control!

Filed Feb 18, 2025 · Acceleration, Brakes · MI

When cruise control or self-driving systems are engaged, there have been numerous times when the automatic emergency braking system mistakenly slowed the car suddenly. At 70+ mph, this is incredibly dangerous. The AEBS apparently sees shadows as dangers. Fortunately, there has never been an instance when another vehicle has been close behind.

Filed Nov 13, 2024 · Brakes, Driver assistance · CA

It brakes at highway speeds of 70 without reasons on cruise control and FSD. Happened three times on highway 46. It can be very bad if there was a car behind me. This happened to me through all these years since 2019.

Filed Sep 15, 2024 · Driver assistance · MD

Tesla Model 3 with FSD (Full Self Driving) package. Engaged FSD to drive home today but vehicle failed to recognize ALL traffic control signals (stop signs, red & green stoplights. The first time this occurred, I had to brake emergently to avoid collision with cross traffic that had a ‘green’ light. Subsequently reactivated FSD to check the issue and vehicle attempted to run several more red lights and stop signs.It did, however recognize and stop for stopped traffic ahead and performed fairly well with autosteer. This is the first time we have had this potentially-fatal issue. We have, for several months had an issue where some or all of the Tesla cameras fail intermittently. This usually happens at the beginning of a drive and the vehicle alerts us ‘Automatic braking temporarily unavailable.’ Sometimes it recovers on a subsequent drive the same day and rarely recovers on same drive. When cameras are out, ALL the ADAS features are inoperative as they require camera input. Also, the standard feature of ‘speed control’ does not function because Tesla has only adaptive cruise control. Today’s drive was the first time cameras seemed functional on drive home & vehicle allowed me to engage FSD when there was apparently a major safety issue.

Filed Jun 18, 2024 · Acceleration, Driver assistance · FL

Tesla has combined cruise control with their Auto Pilot feature. Now there is no human override to what speed limit to use, Tesla determines the speed to used based on certain criteria. This puts the driver at risk who may want to lower or increase the speed limit based on certain conditions Tesla may not be able to detect. For me it was a 9 PM run to the store thru an area that had temporary road construction and known to be a speed trap zone.

Filed Feb 24, 2024 · Brakes, Driver assistance · CA

I was driving on the road at night a few days ago and there was a car that was pulled over on the side of the road with hazard lights flashing. The Tesla slowed down and applied the brakes very hard. The Tesla also applied the brakes for no reason. It was on adaptive cruise control, and all of a sudden it would hit the brakes really hard and I would have to take it off the adaptive cruise control because I did not want to get into an accident. The system automatically applied the brakes in both cases which I would call it, “The “phantom braking”. The car had done this before but not to this extent on adaptive cruise control. This only happened when it was on cruise control. I have been very hesitant on putting it on adaptive cruise control because it acts up at times.

Filed Sep 16, 2023 · Brakes, Driver assistance · CA

The car is plagued by "phantom braking." It occurs when I am on the freeway - the car suddenly brakes and/or decelerates. (Sometimes it is a sudden braking and sometimes the cruise control just turns off.) This is very unsafe - I am fortunate that it has occurred when there is no car close behind me. I feel it happen and put my foot on the accelerator as soon as I can. It's happened as many as 3-4 times during a long (@500 miles) drive, and other times only once. It occurs in various kinds of weather and I have never been able to figure out why it happens. It has happened when there are no cars in front of or next to my car. I believe this problem has been reported many times before. I do not know what system or part is responsible for this. I have had the car since 2019 and this has been happening as long as I can remember. I have never received any kind of a warning or signal that the car would brake. NOTE: B/c the problem is ongoing, I did not put in an approximate date below.

Filed Sep 4, 2023 · Driver assistance · FL

I experience frequent "phantom" braking while driving north or south on highway I-75. Many times this happens near state route 70 traveling north, but I have had this phenomenon happening driving south or headed north on 275. Cruise control is on, autopilot may or may not be on (I have had it happen in both modes). It's a frightening and very dangerous problem. Speeds decelerate from 75 or so to about 35 or 40. It's sudden and scary and potentially life threatening. I have immediately hit the gas in the multiple times this has happened.

Filed Aug 29, 2023 · Brakes · KY · crash

the federal safety agency is forcing Tesla and other self-driving cars to come to a complete 0 mph stop at stop signs and according to Elon, only 0.5% of all drivers in their fleet actually do this and that seems inline with the general public also doesn't come to a 100% stop at every stop sign and as a result I got rear-ended because in a completely wide-open intersection the driver behind me thought I was going to do a rolling stop but didn't. The point of the federal safety agency is to keep drivers safe and driving like a safe driver and not a robot that follows 100% of all road rules makes an unpredictable driver therefore an unsafe driver. the federal safety agency has allowed car manufacturers like Volvo set max cruise control to 125 mph!!!! That breaks the speed limit on 99.999% of all roads in America but you've allowed it for years because everyone goes above the speed limit and that's ok with the federal safety agency. Letting self driving cars slow to 1 or 2 mph before proceeding in an intersection where no other cars or people are present aligns with what over 99% of all drivers do so that would make them a predictable driver and therefore a safe driver. Not saying allow them to blow through intersections at 3+ mph but not come to a 100% stop, seriously no one does that!!

Filed Jul 9, 2023 · Driver assistance · TX

I own this Tesla model 3 for approximately 4 years. I was driving this car on US interstate highway 10 east, on July 8, 2023. Cruise control and Navigation on Auto pilot was on. A very serious Phantom breaking took place at around 10:52 am, about couple of miles before exit number 400 on I-10. It was clear a day, there was no car in front of me or on my left lane. I was on right lane. auto pilot suddenly reduced my speed from 72 miles per hours to 39 miles per hour in about 2 to 3 seconds. Due to this, a 16-wheel truck behind my car has to swerve to avoid hitting my car from behind and running over me. My wife was in passenger seat. If the 16 wheeler driver would not have taken evasive action, we will have at least two potential deaths.

Filed Jun 18, 2023 · Driver assistance · FL

I recently updated my 2019 Tesla Model 3's software to version 2023.7.15. Ever since I did so I have been getting random, unexplained, and unnecessary decelerations in both adaptive cruise control mode and while driving using the vehicle's autopilot (not FSD). While this is annoying at least it is also unsafe as I could easily be rear-ended for no reason when this happens. It has happened every time I drive the vehicle and usually more than once per drive.

Filed Jun 10, 2023 · Driver assistance · AZ

Driving on a clear, sunny day in Arizona on interstate 8 at highway speed with the Tesla AutoPilot engaged. There were no vehicles in front of me and no obstructions in the road when the car did heavy braking (aka phantom braking) for no known reason. I immediately had to override the braking with pressing on the accelerator. This occurred multiple times on the same road. If a vehicle had been traveling behind me when this happened, it would be highly likely that a collision would occur because of the random nature of the extreme braking. I did not use the adaptive cruise feature the rest of the trip in fear that a collision would occur. No warning messages were/are present. The Model 3 I drive is equipped with sensors on the front bumper that (I believe) Tesla has deactivated to use vision-only instead. I drove for years using the non-vision (sensor) method without experiencing phantom braking, so this experience is new to me.