2021 TESLA MODEL 3 Forward Collision Avoidance Warnings Problems

The problem I am having, when I use traffic-aware cruise control, is "phantom braking" This has occurred multiple times on two-lane highways when a large truck is passing in the opposite lane, and sometimes on a freeway when I pass a large truck that is in the right lane. The car suddenly slows or stops and the forward collision warning alarms sound. My vehicle is available for inspection upon request. This upsets everyone in the vehicle because it is so sudden that they are startled and frightened when the alarm sounds and the car abruptly brakes. My wife has asked me to not use the traffic-aware cruise control at all because of this problem. I have owned the car almost 9 months and my wife has not and will not drive it because of the this problem. It is also quite dangerous because a vehicle behind me would not be...

Our 2021Tesla Model 3, delivered in September 2021, has ongoing, repeated problems with sudden, unexpected braking, whenever cruise control or auto-steer is engaged. This happens regularly while driving on two lane highways, usually when a large sized vehicle is approaching in the opposing lane, but it also occasionally happens when there is no oncoming vehicle. Typically, an alarm also sounds and a warning light flashes in the car, warning of imminent collision risk. This happens every time we have used cruise control or auto-steer sometimes with nearly every large oncoming vehicle. This is unsafe because of the risk of a rear-end collision. The car dramatically slows. It also risks injury to the car occupants from being thrown forward unexpectedly. Along with the alarm and flashing signal, the braking is so dangerous and unnerving that it makes cruise control and auto-steer unusable. We have complained to Tesla of this problem. Tesla...

During a 144 mile trip, my late 2021 Model 3 "phantom-braked" 4 separate times in just one day. Meaning the car saw some imaginary object in front of it and proceeded to slam on the brakes with traffic behind me. The first two occurrences this day were due to what I'm assuming is the shadow of two Semis. The third occurrence was after driving past a van on the shoulder with the autopilot system off. The last occurrence, before I seriously began to feel unsafe in this car, occurred when about to cross below an overpass with nonexistent traffic in front of me. Up until this specific day, I've experienced 4 phantom braking events spread across 4 months and 4500 miles. After today, and an additional 4 occurrences of phantom braking added within a few miles, my model 3 feels unsafe to me

Phantom breaking has occurred regularly with this vehicle when using adaptive cruise control on two-lane roads. Oncoming traffic in the opposite lane will cause the vehicle to suddenly decelerate, which has led to moments where the vehicle was rear ended. This has most typically occurred during curves in the road. There has never been a valid reason for the sudden deceleration, and the car is apparently confusing the oncoming vehicle with a imminent danger.

The vehicle will unexpectedly slam on the brakes while using the Traffic Aware Cruise Control. I've noticed it happens mostly on two lane highways with oncoming traffic or heavy shadows on the road. It will also happen on interstates when a shadow is on the road or a dark patch. I'm afraid I will be rear ended if this continues.

Emergency braking is applied while using adaptive cruise or autopilot. This happens on two lane undivided roads with larger vehicles approaching on the opposite side. It does not happen with cars or pick ups. For no reason the forward collision warning will sound and emergency braking is applied. If a vehicle is behind my car I would have been rear ended. I have sent error reports over the air to Tesla at the moment. I also brought my car into service and documented this issue. They did recalibrate the forward cameras but no difference was seen. Just out of the blue the car will.reduce speed by 20 mph. In my video the speed went from 46 to 29. The funny thing is it did not slow fir the oversized truck. I have videos if the incidents but I cannot upload them on here.

Purchased my Model 3 in August 2021. Autopilot and cruise control features worked flawlessly for the first few months of ownership. In September of 2021 after a software update, the vehicle started to perform unsafe reactions while on autopilot or cruise control. If any large vehicle like a semi-truck or vans were traveling in the opposite direction of travel on any two lane road, cruise control or autopilot will slam on the breaks and activate the forward collision warning tones. Reactions like this from driver assist technology could easily result in a multi-car accident. While commuting on a busy road (10 miles) on cruise control/autopilot, this issue could occur over 10 times on one drive. While making contact with Tesla service in September, a representative said that Tesla's autopilot software team was aware of the issue affecting Model 3's similar to my VIN. The representative ensured that the team was...

Phantom braking events on most every type of road and drive when using cruise control, not autopilot or other automated systems. Standard cruise control is unusable and is a safety concern with constant warning alerts and automatic emergency braking when other vehicles pass by safely in the adjacent lane.

We continue to have issues with Tesla's autopilot feature. The Model 3 with autopilot activated or just with the adaptive cruise control activated, will "phantom" brake for zero reason. Today, 12/14/2021, it happened three times within 90 minutes. All three times there was no reason for the car to make emergency actions. Once I had a truck with a trailer behind me, forcing them to brake hard to avoid hitting the rear of the car. I submitted a service request to Tesla and this is what they told me: Incidents like the one you are describing where the vehicle slowdowns for apparently no reason are generally caused by a few reason such as: Map data inaccuracy, Speed limit data inaccuracies, the vehicle reacting to an upcoming event, GPS position inaccuracies, and predicative driving anomalies. In all of these situations the computer is trying to make the safest determination of what...

ADAS systems detect oncoming traffic from the opposing lane on single lane roads and sounds forward collision alarm. If using adaptive cruise control or Autopilot, vehicle will rapidly decelerate. This poses a risk to the occupants and vehicles behind from unexpected changes in speed, which could cause a rear-end accident. The issue can be repeated in the scenario described above. Forward Collision Warning alarm goes off when it sees a oncoming vehicle far off in the distance.

Terrible phantom braking. On a road trip, flat straight open roads, little to no traffic in front of me, and consistent full on hard braking from 75mph down to 35mph in a split second. Multiple times and so consistent I had to stop using the cruise control completely. This never happened like this in my day to day city driving. But as is, the cruise control is nerve wracking and dangerous. Thankfully no cars behind me because it could very easily cause a serious and deadly accident.

Recurrent, frequent, and unpredictable sudden braking while vehicle is being driven in TACC (Traffic Aware Cruise Control). These event, or "phantom brakes", occur when there is no visible obstruction ahead of the car (i.e. crossing vehicle or object), nor any environmental explanation (sun glare, heavy rain, etc.). Events occur in all conditions, including daytime, clear sky, with or without traffic. Frequently the collision warning will sound during these events. Given the episodes occur during highway driving, the unexpected hard braking is a set-up for being rear ended by cars behind me. These events are most common on 2 lane divided highways, and can occur as frequently as every 2-5 minutes. Brought in for evaluation at Tesla service center, and they refused to acknowledge any problem, stating the car is "operating as designed." This was based on the fact that they did not reproduce symptoms on their test drive. Although I...

The “traffic aware cruise control” feature is flawed to the point of being unusable add dangerous. My Model 3 (leased in late September 2021) exhibits very frequent “phantom braking” problems when TACC is active. Some are mild, the car applying the brakes and slowing down despite the absence of nearby cars or hazards. Some are dramatic, the car slamming on its brakes and sounding an alarm — again, with no hazards. I have a service appointment scheduled for Dec 3 but I’m not optimistic.

Traffic Aware Cruise Control in the 2021 Model 3 is down right dangerous. Constant random braking for no reason at all. Happens multiple times if I use TACC on 2 lane roads. Happens nearly every time I use TACC on a 4 lane road. If I have traffic behind me I cannot use TACC at all for fear I would be rear ended.

"Traffic Aware Cruise Control" (aka Autopilot) applied full braking and sounded collision warning when no collision was imminent. Had traffic been following closely, a rear-end collision could have occurred. Several other similar "ghost braking" incidents have occurred but this was the worst and most dangerous. Vehicle has not yet been taken to a repair facility. Vehicle has not needed inspection by law enforcement nor insurance company.

While driving on C-470 westbound going 70 MPH with the car on Autopilot, the car braked hard dropping the speed to 40 MPH. If a car would have been behind me, they would have hit the back of my car. This issue is happening frequently, from neighborhood side streets, city streets, and on the interstate highway.

Autopilot constantly brakes due to automatic emergency braking on two-way highways at night. Every time a car passes in the other direction, the car starts braking, often as soon as the headlights are visible. This is a significant safety issue and resulted in me disabling AEB, which re-enables automatically every time I drive. I needed to go out of my way and ensure no one was tailing me because the car would brake check them. This wasn't an isolated incident. Every time I've been on a two way highway and sometimes even on multi-lane unlit highways, I have these braking issues constantly. I was driving under the speed limit.

When driving using the traffic aware cruise control, the vehicle experiences frequent abrupt and random rapid deceleration. This causes a safety issue when other vehicles are behind due to the rapid change in speed. Occasionally the vehicle will produce a forward collision warning with nothing in the path of the vehicle. This makes the cruise control function less usable and no option to disable the adaptive function.

Car hits the brakes and activates the emergency braking and forward collision warning very frequently (10+ instances during a 1 hr drive) in instances that absolutely do not warrant it (no obstacles or cars in the lane of traffic). Product is unsafe in the condition that it is in, and car offers no way to revert to standard cruise control. This type of automatic behavior could cause accidents.

Vehicle slams brakes on with on coming traffic when cruise control activated. Have attempted to contacted Tesla several times. Tesla actually canceled a mobile service stating they did an update to fix the issue. It did not. In fact it made the problem worse. The are not answering my emails or texts, calling the service line does no good the say they can’t see the issue in their data

System erroneously sounded forward collision warnings about once per minute. Automatic Emergency braking faulted and could not be enabled. Firmware version 2021.36.5.2

The vehicle will suddenly brake with no discernible obstacles when advanced cruise control is engaged. We experienced multiple “phantom braking” events during an 800+ mile road trip (round trip) last week, which was so frequent and unpredictable that autopilot and autosteer (Tesla’s terms) are unsafe to use. The first half of our trip was on two-lane highways and the car would brake heavily on clear roads and triggered two emergency accident avoidance events when large pickups were approaching in the opposite lane (screen showed a vehicle in red in our lane, audible alarms + heavy braking). The braking was so sudden that we were almost rear ended twice. We chose a different route to return home on a divided interstate, hoping that the TACC system would work. It did not. The car would brake dramatically when we went over a small rise, there was a vehicle in our lane at...

Automatic cruise control (autopilot) has twice failed to decrease speed when it should have. The vehicle will also brake at a moderate to high rate on the highway with zero warning or message, with no obstacle or vehicle on the road, creating a dangerous situation with following vehicles. ACC also requires the use of automatic wipers and automatic high beams, both of which activate at random times and thus encourage their disuse (e.g. sunny clear day, or with obvious traffic in front of the vehicle, respectively). Automatic high beams turning on and flashing when they shouldn't is unsafe for other drivers. Finally, the use automatic wipers and high beams is not listed as a requirement for active safety features such as FCW and AEB to function. However, these two critical safety systems rely on the same camera array and systems with problematic functionality described above. It's hard to believe that...