On 09/18 , I was using the Smart Summon feature of my Tesla Model S in the parking lot of Costco, Greenwood (Indianapolis, IN). The intent was to have the vehicle autonomously navigate from its parked spot toward my location, as designed and advertised by Tesla. During the Summon operation: 1.The vehicle failed to correctly detect and avoid a fixed obstacle (the cart return stand where shopping carts are housed). 2.Instead of stopping or rerouting safely, the car collided with the structure, causing visible damage to the front of the vehicle. 3.While there was no damage to public property or injury to people, the incident demonstrated a serious safety risk, since pedestrians or nearby vehicles could have been struck had they been present. 4.The Smart Summon system did not provide sufficient warning or correction during this event, despite being marketed as capable of safely maneuvering in such environments. This failure shows that the Smart Summon feature did not perform as intended and behaved in an unsafe manner in a real-world public parking environment.
2020 Tesla Model S driver assistance problems
25 complaints (31% of all complaints for this car). 7 crashes reported.
- owner complaints
- 25
- of this car's complaints
- 31%
- crashes
- 7
- recalls
- 3
Which part fails
- Adaptive cruise control14
- Automatic emergency braking11
- Warnings6
- Warning2
- Sensing system: camera1
- Assist1
At what mileage
Complaints by mileage at the time of the problem.
Tesla Model S driver assistance problems in other years
Specific symptoms reported on the 2020 Tesla Model S driver assistance
Phrases found in the owners' own descriptions, so one complaint can mention several symptoms.
Related recalls
Forward collision avoidance: warnings: external/pedestrian alert
- What is wrong
- Tesla, Inc. (Tesla) is recalling certain 2013, 2018-2021 Model S, 2020-2021 Model X, 2018-2022 Model 3, and 2020-2022 Model Y vehicles. A factory reset muted the Pedestrian Warning System (PWS) sounds. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 141, "Minimum Sound Requirements for Hybrid and Electric Vehicles."
- Risk
- Pedestrians may be unaware of an approaching vehicle if the PWS sounds are muted, increasing the risk of a crash.
- Remedy
- Tesla released an over-the-air (OTA) software update, release 2023.44.30.14, free of charge. Owner notification letters were mailed April 27, 2024. Owners may contact Tesla customer service at 1‑877‑798‑3752. Tesla's number for this recall is SB-24-00-006.
Recall number 24V153000 · Recall details
Forward collision avoidance: warnings: external/pedestrian alert
- What is wrong
- Tesla, Inc. (Tesla) is recalling certain 2020-2022 Model S, Model X, Model Y, and 2017-2022 Model 3 vehicles. The Boombox function allows sounds to be played through an external speaker while the vehicle is in motion, which may obscure the Pedestrian Warning System (PWS) sounds. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard number 141, "Minimum Sound Requirements for Hybrid and Electric Vehicles."
- Risk
- Pedestrians may be unaware of an approaching vehicle if the PWS sounds are obscured, increasing the risk of a crash.
- Remedy
- Tesla will perform an over-the-air (OTA) software update that will disable the Boombox functionality when the vehicle is in Drive, Neutral and Reverse modes, free of charge. Owner notification letters are expected to be mailed April 5, 2022. Owners may contact Tesla customer service at 1‑877‑798‑3752. Tesla's number for this recall is SB-22-00-003. Note: This recall has been superseded by Recall 22V‑235. Tesla's number for the new recall is SB-22-00-003.
Recall number 22V063000 · Recall details
Forward collision avoidance: sensing system: camera
- What is wrong
- Tesla, Inc. (Tesla) is recalling certain 2017-2021 Model S, Model 3, Model X, and 2020-2021 Model Y vehicles operating software version 2021.36.5.2. A communication error may cause false forward-collision warning (FCW) or unexpected activation of the automatic emergency brake (AEB) system.
- Risk
- Unexpected activation of the AEB system may cause the car to stop suddenly, increasing the risk of a crash.
- Remedy
- Tesla Service has released an over-the-air (OTA) software update, free of charge. The recall began October 25, 2021. Owners may contact Tesla customer service at 1‑877‑798‑3752. Tesla's number for this recall is SB-21-00-004.
Recall number 21V846000 · Recall details
Related investigations
Unexpected Brake Activation
On February 16, 2022, the Office of Defects Investigation (ODI) opened a Preliminary Evaluation (PE22002) to investigate reports of unexpected deceleration while driving with the adaptive cruise control system engaged in Model Year (MY) 2021 – 2022 Model 3 and Model Y vehicles manufactured by Tesla. The subject systems include Autopilot (all versions), Full Self-Driving (FSD) and Traffic Aware Cruise Control (TACC). These complaints have been colloquially referred to as “phantom braking”. ODI opened PE22002 to determine the scope and severity of the potential problem and to assess any resulting safety issues in the subject vehicles. The alleged defect is an unexpected and unrequested vehicle deceleration triggered by the subject system during subject system engagement. The alleged defect does not occur when the subject system is not in use and is separate and distinct from Automated Emergency Braking (AEB). During vehicle operation, AEB is actively monitoring in the subject vehicles regardless of subject system and its intervention is accompanied by audible and visual collision warnings. A Vehicle Owners Questionnaire (VOQ) trend originating in November 2021 prompted ODI to open PE22002. VOQ narratives reported unexpected brake activation while using TACC, Autopilot or FSD. The trend grew from 99 by the end of 2021 to 314 by February 16, 2022, when PE22002 was opened. ODI sent Information Request (IR) Letters to Tesla on May 4, 2022, and July 11, 2024, to request salient data to quantify vehicle production, field incidents, and the physical parameters of the phantom braking reports. ODI also requested information pertaining to Tesla’s internal assessments, problem resolutions, and their assessment of the alleged defect. Typically, the complaints to ODI and Tesla allege a 10-20 mph speed reduction at highway speeds over a 1-3 second time period.No collisions were identified. Drivers reported seeing no vehicles ahead in the travel lane that would have triggered the deceleration. Many complaints reported the conditions taking place on higher speed roadways in sunny conditions with shadows on the roadway. Complainants typically applied the accelerator to override the unexpected deceleration, and subject vehicles did not come to a complete stop or steer out of their travel lane. ODI analyzed data provided by Tesla in addition to consumer complaints submitted to ODI. Tesla’s complaint and field data exhibited some behavior that aligned with the transition from a radar-vision fusion system to vision-only in mid-2021. VOQ traffic coincided with public events such as Recall 21V846, the opening of PE22002, and several related media publications. In February and March of 2022, Tesla released firmware updates 2022.4.5.1 and 2022.4.5.17 respectively to target aspects of the subject system programming that affect unexpected deceleration. Incident traffic has dissipated substantially in the past years, with 45 incidents reported in 2024, 19 in 2025, and 3 since the beginning of 2026. The conditions reported, while concerning to the drivers, did not alter the vehicle’s lateral positioning in their lanes and did not cause significant loss in distance between the subject and following vehicle to lead to a collision. Complaint traffic to both the federal safety agency and Tesla reported the same conditions- vehicles traveling with the subject system engaged at higher speeds decelerating suddenly with no commensurate vehicle or obstacle ahead in the same lane. In view of these points, and a low demonstrated hazard to drivers, this Preliminary Evaluation (PE) is closed. The closing of this investigation does not constitute a finding by the federal safety agency that a safety-related defect does not exist. The Agency reserves the right to take additional action if warranted by future circumstances. To review the ODI reports cited in the Closing Resume ODI Report Identification Number document, go to
PE22002
What 2020 Tesla Model S owners say
Most recent owner complaints, unedited.
Vehicle was tested for concern about self driving after test drive with tech told ok 3 days later Summoned car and immediately turned into adjacent vehicle all captured on video in 1-2 seconds. No issues with summons for over 4 years $2200 damage to adjacent vehicle but Tesla no damage left front wheel caused damage on start.
Since the installation of software version 2024.27.25, which includes FSD version 12.5.4, on Sept 26, 2024, any driving which occurs on FSD results in emergency braking events for Green Lights, unprotected/unsignaled crosswalks without pedestrians present, Parallel Parked Cars not encroaching on the lane of travel, vehicles traveling the same direction and similar speed (+/- 5mph), not encroaching on my lane. These frequently reoccurring events were not remedied by any of the subsequent updates received: v2024.32.10 (FSD v12.5.4.1) on Oct 8, 2024 v2024.33.5 (FSD v12.5.4.2) on Nov 2, 2024 2024.44.25.2 (FSD v12.5.4.2) on Dec 10, 2024 While not all events occurred with surrounding traffic, those that did posed a hazard to not just occupants of my vehicle, but those in and around other vehicles, including pedestrians. Most other drivers do not expect and are unprepared for a vehicle to apply panic-level emergency braking and come to full stop at green lights, before unprotected crosswalks with no pedestrians present, or along well-traveled streets without significant errant other drivers. No warning lights, chimes, or other indications ever appeared on any of the displays or instrument clusters within the vehicle during any of the events. The FSD traffic display did not indicate or highlight any features of the surrounding area that were causing it to slow or stop. The problem has been regularly experienced by many other drivers, as evidenced by the large number of similar reports across the various Tesla driver communities online. I and my vehicle are available for inspection and I'm additionally willing to take an inspector on a ride-along to demonstrate the issue.
In all assisted driving modes except Full Self Driving (FSD), the car properly displays the speed Limit it has determined either by Map data or visual confirmation. In FSD, apparently only on pre-2021+ Model S cars, the determined speed limit is not displayed. In my town we have a US60 route. The car sees these signs and determines the speed limit is 60, even though it is only 35. The driver notices a rapid acceleration and may observe the set FSD speed has changed to 60. There is no Speed Limit displayed in this mode. Very dangerous to go this fast on a 35 MPH road. When not using FSD, the car does show this error in the speed limit as being 60, even though the car determined speed limit itself is in error.
The contact owns a 2020 Tesla Model S. The contact stated that while driving at various speeds between 40-50 MPH, the vehicle experienced phantom braking, causing the vehicle to abruptly stop in the middle of the road. The contact indicated that the failure had occurred on multiple occasions at the same road location. Also, the contact indicated that the vehicle had erroneously attempted to switch lanes and at one time attempted to switch lanes into oncoming traffic. The cause of the failure was not yet determined. The manufacturer and local dealer were notified of the failure. The failure mileage was 100.
Setting: Adaptive cruise control, 70 MPH, no nearby traffic, no nearby bridges or overpasses, no visible obstructions, straight highway, daytime, clear skies. Incidents (multiple): Unexpected, inexplicable braking. During one of the incidents, there was a splotch of some sort on the road (perhaps spilled paint). During all other incidents, there was nothing obvious which could explain a misperceived need to brake.
Error message popped on my screen steering might require extra force and shortly after that I lost power steering, cruise control, automatic emergency, braking, forward collision warning land departure etc. Contacted Tesla service to acquire about recalls since I remember reading about it.
From Aug 23 to 28, 2023, we traveled in our 2020 Tesla Model S Long Range Plus vehicle from Santa Fe, NM to San Diego, CA and back, for a total distance of approximate 2100 miles. We drove primarily interstates (I-25, I-10, I-8, I-5) where speed limits ranged from 55 to 75. We experienced numerous instances of what is known to Tesla owners as sudden, severe "phantom braking" [hereinafter PB] while the cruise control was activated (not AutoPilot, nor FSD, just cruise control). In ALL instances, no cars or other objects were visible within 1 mile ahead of our vehicle, and in ALL instances, these "phantom braking" incidents happened on absolutely flat, straight, smooth road surfaces, at all times of day, morning, noon, and night. This car has had PB problems since the day was purchased; in fact on that day, there were at least two sudden PB incidents while I drove home in the new car! At numerous times since, I've reported these problems to Tesla Service---to no avail. The problem is widely known among Tesla owners, and to my knowledge no owner has been able to get Tesla to do anything. On this most recent long-distance trip, our PB incidents happened typically at the posted speed limit of 75mph in all-clear situations---nobody else anywhere remotely nearby. The car would be operating smoothly when all of a sudden the brakes would engage and the vehicle would rapidly decelerate, throwing forward anything not fastened down inside the car. Because of the history of this problem, I NEVER activate cruise control whenever ANY vehicle is near the rear of the car, as I can never tell if my car will "phantom brake" at that moment, causing a possible accident. I consider this problem VERY dangerous. I have owned this car since 2020, and Tesla has refused to do anything to fix it, always coming up with one or other stalling technique or excuse. I consider this an extreme safety flaw of this car and hope the federal safety agency can help to force Tesla to fix it once and for all.
Driving on freeway speed 80mph with no other cars around the car slammed on brakes while on cruise control. It was able to accelerate and the next time I put the cruise control on a few minutes later it slammed on brakes again. Car clean no warning that it was trying to avoid an unseen object. Drove rest of the way without cruise control on and no problems.
Car repeatedly applied the brakes hard and suddenly while traveling at 75mph on the interstate. This occurred while in driver assist mode as well as in cruise control only. It did not happen when driving without any assisted driving modes activated. There were no other vehicles near us nor any objects in the road or on the side of the highway that could have been construed as a reason to emergency brake
Questions about the 2020 Tesla Model S driver assistance
Does the 2020 Tesla Model S have driver assistance problems?
Owners have filed 25 complaints about the driver assistance of the 2020 Tesla Model S, 31% of all its complaints, more than any other problem.
At what mileage do 2020 Tesla Model S driver assistance problems start?
Not enough complaints include the mileage to tell.
Was there a recall on the 2020 Tesla Model S driver assistance?
Yes, 3 recalls: 24V153000, 22V063000, 21V846000. Check your VIN to see if your car still needs the free repair.
What year does the Tesla Model S have the most driver assistance problems?
The Tesla Model S model years with the most driver assistance complaints are 2017 (101 complaints), 2016 (78 complaints) and 2015 (71 complaints).
Other 2020 Tesla Model S problems
Suspension 14Steering 10Acceleration 8Electrical 7Brakes 6Transmission 6Body 5Locks 4Wheels 4Seat belts 3Airbags 2Fuel system 1Tires 1
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