2021 Tesla Model S Speed Control & Cruise Problems

Driving on divided highway at night, the car slowed dramatically at each exit from the highway.

Vehicle braked without warning with cruise control engaged. Luckily there were no other vehicles near us when this phantom braking occurred.

On March 19, 2023, I put my Tesla in drive and it went into reverse . When I tried to brake the speed accelerated. We were unable to stop the vehicle, while driving in reverse the car hit two mailboxes and two ceramic flower pots. It has been over 6 weeks and Tesla will not return my calls or messages. My insurance company looked at the body of the vehicle for a repair estimate. Nothing indicated that there was a problem prior to the incident.

The Traffic-Aware Cruise Control has been braking unexpectedly and for no valid reason. The most recent example was when we were driving along US Hwy 24 between Wilkerson Pass and Fairplay, CO. The car suddenly braked even though there was no hazard. This has been happening regularly on this drive, in both directions, multiple times per drive. When this happens, the road is generally straight, with little, if any, elevation change. This is a safety issue because if this happens when a car is driving closely behind us, the unexpected braking could result in a rear-end collision. I have not reported this to Tesla because I understand this is a widespread issue that many people encounter, so I believe Tesla is fully aware of the issue. This problem seems to have gotten significantly worse after Tesla deactivated RADAR in the vehicle (without my consent). My understanding is that they are now using only cameras to manage Traffic Aware Cruise Control. Regardless of the reason, this issue has been happening with much greater frequency since around December, 2022 or January, 2023.

Car repeatedly, randomly slams in brakes while cruise control engaged for no apparent reason. Not speeding, no other cars or blockages around, open highway on a bright, clear day.

The vehicle intermittently brakes for no reason with the cruise control enabled. This is going to cause an accident.

On 4 Aug 2022, at 10:24am (CST), while traveling northbound on Hwy 287 just south of Henrietta, Texas with the Tesla Autopilot speed set at 80mph with a posted speed limit of 75mph, the car was in the left lane of a two-lane, high-speed highway, when the car suddenly and unexpectedly slammed on the brakes, gave a "TAKE CONTROL IMMEDIATELY" warning and rapidly shifted its lane position, almost causing a wreck with the car behind me. There were no vehicles beside me and nothing to the front or sides to cause concern or indicate that there was any reason for the sudden and abrupt braking maneuver.

The contact owned a 2021 Tesla Model S. The contact stated while driving approximately 100 MPH, as he took his foot off of the accelerator, with the vehicle brake control set to "aggressive slowdown," as the vehicle slowed the contact looked into the rearview mirror and observed white smoke issuing from the rear of the vehicle. The contact then depressed the brake pedal, and instead of slowing the vehicle accelerated at a dramatic rate and the contact lost control of the vehicle and left the roadway. The contact stated he was not aware of any warning lights being illuminated. The vehicle went into a ditch and continued straight following the ditch. The contact stated that the vehicle had not lost any speed, rather it seemed to be going faster. The vehicle crashed through a fence, drove up a slight berm, and went airborne. The contact's vehicle crashed into the ground, front end first, after flying 130 feet in the air, and began to roll end over end two to three times. The contact and his two passengers were unconscious after impact with the ground, the vehicle had come to a stop and caught on fire. The contact had attempted to exit the vehicle once he regained consciousness, however, he had difficulty since the driver's side door was jammed and his left ankle was dislocated and his right ankle was broken. The contact had managed to crawl out of the vehicle through the driver's side window which had completely shattered. The contact stated that the passenger in the front seat was not seriously injured, although he was transported to a hospital and released that same day. The passenger in the rear was transported and hospitalized with internal bleeding and a broken rib, the contact was not told which rib was broken by the passenger. The vehicle had been engulfed in fire and the contact had rolled into a ditch, a passerby was on the scene and called emergency services. The contact was transported from the scene by a rescue helicopter and flown to a trauma center. At the trauma center, the contact was treated for internal bleeding, the contact stated that 30 percent of his colon was removed, and his spleen had been ruptured. The contact had fractures of both orbits of his eyes, his nose was broken, and he had a severe concussion, with two broken ribs on the right side and one broken rib on the left of his chest. The contact stated that according to a police report and insurance investigation all the air bags had been deployed. The vehicle had burned completely and had to be lifted onto a flatbed truck and was driven to an impound lot. The fire had been so intense that the vehicle's black box was destroyed. The manufacturer had been informed of the failure. The failure mileage was approximately 8,000.

experiencing phantom braking. On a recent trip I had several episodes of phantom braking where the vehicle slammed on the brakes without any obstacles in front of the car. Just an open road. While this has happened on two lane roads with oncoming traffic on this recent trip it happened on a freeway with nothing in front of it. There were a lot of bugs in the air and I'm wondering if a bug hitting a camera was the cause. Also, the car at a stop light gave me a heads up that the light had changed. Without looking at the lights I started to accelerate only to find out that it picked up the left and turn light not the light controlling my lane. Almost crashed into oncoming traffic.

when travelling around 70-75 miles on AutoPilot car makes strong brakes which is known as phantom breaking. This is happening every single day on highway which is really scary.

I was driving on I39 north of Madison WI this afternoon, it was a clear day with light traffic and early afternoon on adaptive cruise control when the car on two occasions braked hard for no apparent reason. This braking would be a serious safety concern if a car had been behind me, as they would not have anticipated me braking so severely for no reason. From my reading this is a known problem with this car.

DRIVING ON HIGHWAY AT 65-70 MPH WITH AUTO PILOT AND SPEED CONTROL ENGAGED. WENT TO CHANGE LANES FROM LEFT TO RIGHT. PUT ON TURN SIGNAL, CANCELLED AUTO PILOT BY TURNING STEERING WHEEL TO RIGHT AND MOVED TO OPEN RIGHT LANE. THERE WERE NO VEHICLES AROUND US AT ALL. THE CAR SUDDENLY, UNEXPECTEDLY, AND VERY SHOCKINGLY SLAMMED ON THE BRAKES CAUSING ITEMS TO BE TOSSED AROUND IN THE CAR, ENGAGING ALL OF OUR SEAT BELTS WITH SOME DISCOMFORT, AND SENDING SOME LOUD ALARM OR WARNING SOUND TO GO OFF IN THE CAR. IT SCARED ME, MY WIFE AND DAUGHTER VERY MUCH. IF THERE HAD BEEN A VEHICLE IN THE LAND BEHIND US, THERE'S NO WAY THEY COULD HAVE AVOIDED HITTING US VERY VIOLENTLY AND CAUSING INJURY AND PROPERTY DAMAGE. THIS HAPPENED 2 OR 3 TIMES IN MY FORMER 2016 MODEL S, BUT I NEVER EXPECTED IT IN THIS 2021 MODEL. A GOOGLE SEARCH WILL REVEAL THE VAST NUMBER OF TESLA DRIVERS WHO HAVE HAD THE SAME OR SIMILAR EXPERIENCES.