2017 Tesla Model S: brakes engage by themselves (phantom braking)

Filed Sep 23, 2025 · Driver assistance · CO

Software version 2025.32.3.1. Using Tesla’s auto-steer / enhanced autopilot (not fsd) causes many “phantom braking” events when going through several intersections on my commute. It’ll say a message “Curve Assist Active”, however I’ll be on a very straight and flat road with no curves. It’s 65 mph road and it will brake / slow down the car very hard and fast, if I don’t catch it in time it’ll get down to ~45 mph within a second. Even when traffic is going slow already, like 40 mph, it’ll still bring up the message and try to brake and slow down, though not as hard. Typically to about 25-30 mph. I usually can catch it and use the accelerator to prevent it, but sometimes it’ll happen so sudden and I worry about getting rear-ended by someone behind me. Very repeatable. Very startling and concerning when it happens when I don’t expect it to. I believe it’s a mapping issue as it has not been fixed in over a year and after several software updates.

Filed Nov 10, 2023 · Driver assistance · IL

5 times on a cross country trip, I experienced the phenomenon of "phantom braking" . As I was driving with Adaptive Cruise on, doing approximately the speed limit, the brakes were automatically applied and the car started to rapidly slow down. Luckily there was no one behind me so I was not rear ended ! I immediately took the car to the local Tesla service center thinking there was a problem with the car, but they told me this is a know issue with no solution at present. One tech told me he has a Tesla himself and has experienced the same issue ! He told me that he just punches the accelerator and keeps on driving !

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

During a road trip (May 2023) with cruise control activated, I had at least 5 phantom braking events. The most serious was in Las Vegas on the freeway with a very severe braking event. I now no longer use cruise control in crowded traffic so that I won't get rear ended when a phantom braking event happens.

Filed May 26, 2023 · Driver assistance · KS

When using the automated cruise control or full self driving, it will unexpectedly phantom brake. Seems to happen more when there is full sun. I have the latest updates. Did much better when cloudy, but it would still phantom break a few times during a 12 hour trip. But when in full sun, it did brake 10+ times.

Filed Feb 18, 2023 · Acceleration, Brakes · MN

This alert is about "phantom braking", which is well known to Tesla owners, and the subject of much online discussion among owners who seem to all experience this and are furious that it continues to exist. Here's what happens, very, very often yet: with adaptive cruise control engaged (with or without "autopilot", ie 'autosteer' also engaged), the brakes are applied suddenly without any need for braking (no objects in the way of travel, etc). We just completed a trip on I-94 from Billings/Red Lodge, Montana across North Dakota, where phantom braking was experienced probably 50 times, with no other vehicles ahead of us, and on perfectly dry pavement, etc. There had also been very dangerous icy conditions (lots of even "skating rink ice") on the stretch of I-94 in Montana, from Billings into North Dakota. Had the phantom braking occurred on one of the sporadic ice patches further east, it could have easily caused a serious accident, not just been a scary nuisance. In situations with heavy traffic, phantom braking could easily result in rear-end collisions by cars that may be following too close to react before we, the Tesla drivers, override the phantom braking by hitting the accelerator--even that simple maneuver cannot be executed before the car has suddenly decelerated 10-20 mph or more. Some of the phantom braking seems to have been somewhat corrected where we'd first encountered it, on I-394 west of dntn Minneapolis--it doesn't happen as often now as it did a few years ago. There we'd suspected it may have been triggered by the shadows cast on the pavement ahead of us by overhead bridges. But this rash of events across North Dakota this week brought our worst memories and fears back with a vengeance--and with zero theories that could explain it. On a recent online discussion about this issue, there were several pleas for Tesla to give us a "dumb cruise control" option till this gets fixed. Please help foster solutions to this difficult situation! Thank you.

Filed Dec 23, 2022 · Driver assistance · MI · crash

I have reported several comparable incidents that this recent article describes https://www.theguardian.com/technology/2022/dec/22/tesla-crash-full-self-driving-mode-san-francisco?CMP=Share_AndroidApp_Other to Tesla in 2020. Our Model S doesn't have full-autonomy software, and in our case the described "braking for no reason" happen in cruise-control mode, without the (semi) auto-pilot engaged. In one of our incidents the sudden emergency-like braking caused a rear-end collision with the car behind me, it was however light enough that no visible damage was caused to either vehicle. We had paid $5,000 for the (semi) auto-pilot feature when we purchased the vehicle in 2017. I reported these incidents to Tesla (I have the emails and their responses) and after several rejections from Tesla that the issues were not reproducible I asked them to take the vehicle back (trade-in) and remove it from the streets because it was unsafe to drive. I further argued that I can't sell this vehicle to someone with good conscience without letting them know that they should not use cruise control. Tesla never acknowledged an issue and also never took ownership of the problem, we are still driving this vehicle today. I'm available to provide further detail if needed.

Filed Nov 17, 2022 · Driver assistance · OR

On 10/25/2022 at approximately 2:54pm I was traveling north on I-5 through Salem Oregon in the middle lane. Autopilot was engaged as I approached slower traffic 1 block in front of me in the middle lane. A pickup was approx 1 block behind me in the left lane. I activated the left turn signal. The vehicle initiated the transition from middle to left lane. Halfway between both lanes the vehicle applied hard braking action while continuing forward halfway between lanes. I tried to take over with application of the accelerator and force on the steering wheel to return to the middle lane. The steering wheel fought against me and the vehicle made a series of s-turns while braking. I tapped on the brake pedal and the system deactivated. The vehicle decelerated from 65-70mph to what I would guess to be 20-25mph with maximum braking (objects in the cockpit flew forward). The pickup behind me was very close when I regained control. If any vehicles had been closer or had the roadway been slick, the incident could have caused a major accident. I filed a ticked with Tesla and they advised this was known as a "phantom braking" event. There is no known fix, timeline for a fix, or mechanism to advise when there is a resolution. Tesla closed the service request. I'm a commercial pilot (former Part 135 Captain) and former flight instructor. I've been driving for 38 years with zero accidents. I have not used the Tesla autopilot since this incident. It is not safe in the current configuration. Tesla tech characterized the vehicle response as "conservative". There is no reason for maximum braking when nothing is in front of the vehicle. I would like Tesla to provide me with updates on resolving whatever is causing this. I would like Tesla to provide notification when the software patch is applied. Until such point in time when I'm notified the trouble is resolved, I will not be using the autopilot. Tesla charged several thousand dollars for this system.

Filed Sep 26, 2022 · Driver assistance · MN

numerous incidents of phantom braking on open unobstructed highway, causing potential rear end collision. Reported to Tesla on several occasions. Currently on my 3rd MCU(media control unit). Service scheduled with Tesla but I am not optimistic since it has been a persistent issue since owning the car in 2017

Filed Jun 6, 2022 · Driver assistance · OH

I have experienced an increase in the number of phantom braking incidents when my autopilot is engaged. It's been on hilly roads but the car would just decelerate extremely fast when nothing was there. I also had two incidences on the highway where the screens froze and I couldn't control the instrument panels or see my speed etc.

Filed Jun 6, 2022 · Brakes · 37,798 miles · CO

The contact owns a 2017 Tesla Model S. The contact stated while driving approximately 70 MPH, the vehicle experienced phantom braking. The contact stated that the vehicle quickly decelerated without warning to 50 MPH. The vehicle was taken to the dealer but was not repaired. The manufacturer was notified of the failure. The approximate failure mileage was 37,798.

Filed Feb 21, 2022 · Acceleration, Driver assistance · CA

I experienced the "Phantom Braking" phenomenon while driving on freeways. It has happened 3 or 4 times in the last year or so. I did not see any obvious reason for the car to have slowed down dramatically because there wasn't a car in front of me at such instances. it occurred while Autopilot was engaged. It has happened on different freeways (I-680, I-880), traversing in different directions and at different times of the day.

Filed Feb 18, 2022 · Driver assistance, Electrical · 48,000 miles · AL

The contact owns a 2017 Tesla Model S. The contact stated that on three separate occasions while driving at highway speeds with cruise control engaged, the vehicle would suddenly brake on its own. The contact was uncertain if any warning lights would appear on the instrument panel prior to the failure. The service center nor the manufacturer had yet to be notified of the failure. The contact stated that he was able to document the exact time that the latest failure occurred on the vehicle. The vehicle had yet to be repaired. The failure mileage was approximately 48,000.