2021 Tesla Model S driver assistance problems

Filed Sep 29, 2026 · Acceleration, Driver assistance · WA

Tesla has taken away the ability to set maximum speed when using their Full Self Driving. THIS SHOULD BE ILLEGAL!!!! Now, the car can and will do 85 on a 60mph freeway! Sometimes you can't even tell you're speeding that fast until it's too late. INCREDIBLY DANGEROUS! They used to have that feature and they've taken it away. For the greed of collecting more data... AT THE EXPENSE OF EVERY DRIVER'S SAFETY

Filed May 13, 2026 · Brakes, Driver assistance · AL

I noticed it happened before but I couldn't quite figure out what happened! I was driving down the local road and got ready to go under a overpass and next thing u know my EV just slammed on brakes like I was about to hit someone! Seatbelt choked me and made me gag! But when I came through this time It caught me off but after that I realized there's a problem,especially going under that overpass! This couldn't been very dangerous to anyone! This is a VERY DANGEROUS and IMPORTANT SAFETY CONCERN! I STRIVE SAFETY AND THIS COULD BE FATAL!! I NEED TO REACH SONEONE IN SAFETY! ASAP

Filed May 11, 2026 · Driver assistance · CA · crash · 1 injury

I was in full self driving mode and was travelling North bound 110 freeway transitioning to 405 freeway Northbound. In the right lane. Transition curved left. looked at my speed for a split second and as i looked up we were a split second from hitting freeway barrier head-on. We crashed through the barrier and ended on the embankment of the freeway. My car front end was totally demolished, front airbags went off. I was ok, but my wife suffered a L1 vertebrae fracture and was taken to Harbor UCLA Hospital for treatment. She was released 9 hours later with a back brace and pain meds. The accident occured at 8:34 am Sunday April 5th, Easter sunday while on our way to church. Its been over a month and my wife is still in a back brace, but healing slowly. USB Drive taken out of the glove box showed that all cameras cut off about 10 seconds before the crash. Not sure if the whole system turned off.

Filed Oct 20, 2025 · Acceleration, Driver assistance · IL

On October 17, 2025, while using Full Self-Driving (FSD) mode on my 2021 Tesla Model S Plaid, the car failed to stop at two red lights within a three-hour period. In each case, the car attempted to drive through the intersection even though the signal was solid red. I intervened manually and applied the brakes to prevent a potential collision. There were no prior warnings or alerts, and I have not modified the vehicle. This behavior endangers my safety and the safety of others. I am willing to provide the vehicle and any available data logs for inspection if requested.

Filed Jun 29, 2025 · Driver assistance, Suspension · CA

GETTING WARNING ONDASH THAT SAYS "Adaptive ride control unavailable. Vehicle speed limited - Proceed with caution". On the internet many reports are noted of the same problem w Tesla vehicles, especially Model S cars. These have occurred soon after to taking delivery of after 20-30 K miles. Mine occurred at about 31,000 miles in my Model S 2021. Tesla says the need "diagnostics done first " at $275 and then the fix for another $300. This does not seem right.

Filed Nov 17, 2024 · Driver assistance · CA · crash

I engaged Tesla's Autopark to park my car in my usual spot. The car kept going after reaching the back of the parking space, crashing into a pole located around one foot behind the parking spot. The time between when it should have braked and the post was of such short duration that I had no time to apply the brakes and prevent the accident. The car lacks both radar and lidar, either of which would have detected the post. Instead it relies on a single video camera. What made this parking different from previous safe parking attempt in the same space was that the car was perfectly lined up. That meant that the camera could not make use of parallax to enable the AI to notice that the post was moving against the background and must, therefore by close behind instead of 40 feet away. For Tesla Autopark to function safely, it needs to "know" how far back possible obstructions are. It could do so by never backing up with perfect alignment. Instead, the car should move enough from side to side to generate enough parallax effect for it to be able to determine if it is about the crash. The service manager who called to tell me that Tesla decided the accident was my fault absolutely refused to even hear my opinion on what Tesla could do to prevent such accidents in the future. He told me he had be instructed to deliver Tesla's disclaimer and to not listen to anything I might have to say. As an engineer who has patents in the area of both aviation and automotive safety, I have an opinion that might have been worthy of Tesla's hearing. I now suggest you folks warn people that Autopark should not be used to complete the parking procedure unless and until Tesla decides to address this problem. In the meantime, drivers should be cautioned to either not use the feature or to tap the brakes lightly to disengage the feature several feet before reaching the back of a parking space. The driver can then complete the maneuver manually.

Filed Mar 23, 2024 · Driver assistance · AZ

Driving Southeast on [XXX] between Gallup, NM and Albuquerque, NM. I was traveling at 75 MPH on an open road, it was a sunny day. I had the adaptive cruise control engaged (ACC). Literally no traffic in front of me for as far as the eye can see. Nothing that would cause an alert or obstruction in front of the car. The Tesla was on ACC and suddenly braked, hard. I immediately disengaged the ACC and drove manually. It was a frightening incident. If there had been traffic behind me, it would have resulted in a crash, as I would have been rear ended. If the traffic had been a truck behind us, we would probably have sustained extreme injuries. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Feb 16, 2024 · Driver assistance · TX

I have never received an audible alert for my blind spot warning. There is no light on the outside mirrors or anywhere else inside the vehicle to catch your attention. If I am looking at my display in front of my steering wheel I will see a car that is in my blindspot change from GRAY to RED when I activate my blinker; however, the car has never beeped or alerted me beyond passively changing the car color to red on my display screen. If I'm changing lanes I am not looking at my screen which is directly in front of me, I'm looking at the road and I'm looking left or right. I have almost hit many other vehicles multiple times because my car will not audibly notify me that theres a car in my blind spot or a car that is speeding up behind me which I might have missed. This is a feature which I paid for and I feel is defective in it's current state. The car is available upon request for inspection. The lack of an audible BSW alert puts myself and others on the road at an increased risk of collision. I have mentioned it to the dealer but after over two years no update has been made. I have not made a big attempt to correct this issue with the dealer since it's difficult to speak to someone at Tesla. No, the issue has not been inspected by anyone. I discussed it with a rep shortly after I purchased the vehicle but it seems like an issue that Tesla knows about if they only programed the vehicle color to change and didn't program an audible alert. No, there have not been any alerts before this issue as it appears to be a simple programing issue.

Filed Dec 27, 2023 · Acceleration, Driver assistance · CO

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

Filed Aug 25, 2023 · Acceleration, Driver assistance · CO

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