2016 Tesla Model S acceleration problems

VEHICLE SPEED CONTROL

This complaint covers a 13-month continuous chain of severe electrical system failures stemming from a deficient federal safety recall remedy on my vehicle's Media Control Unit (MCU) architecture. Tesla's corporate policy has been to replace only the isolated center screen explicitly tracked by the recall while leaving connected legacy components intact on mismatched architecture. This creates an uneven electrical strain loop that has systematically destroyed my vehicle’s electronics over the last year.In July 2025, the initial recall failure required a VCM processor card swap. In September 2025, the resulting voltage strain forced a center navigation screen upgrade, during which the facility held my car for two full weeks. In December 2025, this continuous parasitic power drain burned out my 12V auxiliary system, forcing me to pay out of pocket for a replacement battery. Now, in August 2026, the 2016 dashboard instrument cluster has completely blacked out while traveling at highway speeds (70 MPH), leaving the vehicle completely illegal and unsafe to drive with zero speedometer visibility.The service facility is actively attempting to evade its 12-month workmanship and parts warranty obligations. Their official technician notes confirm the dashboard screen arrived completely black, yet their recorded remedy was to execute a temporary software reboot and officially instruct me in writing to 'perform scroll wheel resets as needed' while actively operating the vehicle on public highways. Following my official written rejection of the vehicle due to this safety hazard, the local facility even attempted an unauthorized forced delivery transport of the vehicle to my house to hide their failed repair before turning back. They are using temporary software patches to run down the remaining days on my parts warranty and dodge an incomplete federal recall remedy. I am requesting a formal federal investigation into this facility.

NHTSA complaint #11757143 — an unverified report by a vehicle owner.

VEHICLE SPEED CONTROL

On 6/11/26, around 2:10 pm, when i was slowly pulling over to park on a road side, the car suddenly rushed forward unexpectedly. It was so powerful, at the time I could only hear the panic reactions from the two passengers and sense the imminent collision with the parked bmw in the front of several car length away. Right before the collision i steered the wheel to the right to avoid the bmw and my car came to violent halt less than a foot next to the bmw. I came out of my car to check the tire position before backing out to park a bit behind. This was on a country road, a Thursday afternoon with not much traffic. There was no distraction. If not were the enough spacing i would have no doubt crashed into the bmw in the front. When the dust settled, I did a "power off" reset to the model S and drove the rest of the day normally without any incidents. I went to Tesla service center near where i live the next morning, 6/12/26, to report it. They asked the precise time the incident occurred. But did not inspect the car. I was told an inner inquiry will be opened and it would take at least a few days. They said i could continue to drive the car normally which i have not because of not knowing what had caused it. I went to the service center today 6/29/26 after more than two weeks of no feedback. I was very disappointed in the answers given. The guy said basically based on the design of the car the incident could not have been caused by the car ,without providing any info as to what had been found from the promised inquiry. There was no written report on this. The person offered to check the brakes but also said he did not think its necessary. Just to made me feel better he said. At last, he provided the tesla web site to request "private data" during time window of the incident. I told him i will seek help from NHTSA now that tesla is not. I was told by AI, tesla has collected data on every car they sold to the details that can reveal how the paddles were pressed.

NHTSA complaint #11747285 — an unverified report by a vehicle owner.

VEHICLE SPEED CONTROL

I own three 2016 Tesla vehicles with the same known safety defect: two Model S P100D and one Model X P100D, all equipped with the Large Drive Unit (LDU). The component that fails is the rotor coolant seal in the rear drive unit motor. Coolant leaks internally into the motor and inverter, causing bearing wear, corrosion, isolation faults, and eventual complete drive unit failure. The affected drive units are still installed and available for inspection upon request. This defect puts my safety and the safety of others at risk because it can cause sudden loss of propulsion (especially at highway speeds), power reduction, or total drivetrain shutdown, potentially leading to a crash. Coolant in high-voltage areas also raises electrical fault/FIRE risks. The problem is widely reproduced and confirmed: Tesla service centers are familiar with it and replace failed units with updated “-U” revisions that include a coolant bypass. Independent EV shops confirm the exact root cause (rotor seal failure) via encoder inspections showing coolant intrusion and through disassembly. This is a documented pattern failure in all 2012–2020 LDU vehicles. No police or insurance inspections have occurred yet, as no crash or total failure has happened. Tesla is aware of the recurring issue through service records on similar vehicles. Early symptoms before full failure typically include rear motor whining/grinding (especially under load), reduced power warnings, “Rear Drive Unit Fault” messages, and visible coolant on the speed sensor. These can appear gradually. My vehicles have not yet experienced total failure, but the defect is known to be inevitable. I am proactively monitoring encoder sensors. Because this is a systemic design defect affecting thousands of vehicles with clear safety implications, I request NHTSA open an investigation and require Tesla to issue a recall for free repairs/replacements on all affected 2012–2020 LDU vehicles.

NHTSA complaint #11735429 — an unverified report by a vehicle owner.

VEHICLE SPEED CONTROL

I own a 2016 Model S P100D equipped with the Large Drive Unit (LDU). The component that fails is the rotor coolant seal in the rear drive unit motor. Coolant leaks internally into the motor and inverter, causing bearing wear, corrosion, isolation faults, and eventual complete drive unit failure. The affected drive units are still installed and available for inspection upon request. This defect puts my safety and the safety of others at risk because it can cause sudden loss of propulsion (especially at highway speeds), power reduction, or total drivetrain shutdown, potentially leading to a crash. Coolant in high-voltage areas also raises electrical fault/fire risks. The problem is widely reproduced and confirmed: Tesla service centers are familiar with it and replace failed units with updated “-U” revisions that include a coolant bypass. Independent EV shops confirm the exact root cause (rotor seal failure) via encoder inspections showing coolant intrusion and through disassembly. This is a documented pattern failure in all 2012–2020 LDU vehicles. No police or insurance inspections have occurred yet, as no crash or total failure has happened. Tesla is aware of the recurring issue through service records on similar vehicles. Early symptoms before full failure typically include rear motor whining/grinding (especially under load), reduced power warnings, “Rear Drive Unit Fault” messages, and visible coolant on the speed sensor. These can appear gradually. My vehicles have not yet experienced total failure, but the defect is known to be inevitable. I am proactively monitoring encoder sensors. Because this is a systemic design defect affecting thousands of vehicles with clear safety implications, I request NHTSA open an investigation and require Tesla to issue a recall for free repairs/replacements on all affected 2012–2020 LDU vehicles.

NHTSA complaint #11735433 — an unverified report by a vehicle owner.

VEHICLE SPEED CONTROL

My car slams on the brakes consistently at green lights when FSD is activated. This is version 12.5.4.2 of FSD. Tesla is not responding to my inquiries.

NHTSA complaint #11630835 — an unverified report by a vehicle owner.

VEHICLE SPEED CONTROL

The accelerating pedal is the one that was affect it is available upon request for inspection. It put me in danger because while I was driving, it snapped off. Has not been inspected by others. There was no warning lamps and it just happened out of nowhere as well. I was driving.

NHTSA complaint #11627727 — an unverified report by a vehicle owner.

VEHICLE SPEED CONTROL

While driving reduced power light came on. On Highway speed reduced to a crawl.

NHTSA complaint #11521914 — an unverified report by a vehicle owner.

VEHICLE SPEED CONTROL

To whom it may concern, On July 26, 2021, my Tesla was hijacked remotely and controls were overridden while I was on the highway (I almost crashed). This happened sometime between 11:30am and 4pm. I reported the issue to the NY State AG consumer affairs office. In December 2021, the car suddenly turned off and locked me out. It was then towed to another State and I’ve been unable to get it back in my possession. Regards, Gaetano

NHTSA complaint #11472555 — an unverified report by a vehicle owner.

VEHICLE SPEED CONTROL

CPU compatibility to existing OS and memory system causing multiple failures during driving with: 1. instrument cluster reset or reboot (temporarily disables all controls related to buttons/knobs on steering wheel and possibly other safety functions), 2. main nav/computer screen reset or reboot (temporarily disables all controls), 3. auto braking activation (cannot be disabled by user) enabled at dangerous and unpredictable times of city traffic, 4. backup camera picture not updating/frozen during backing uo vehicle, creating illusion of: a. not moving when in reverse while driving, b. not showing objects that may be directly behind vehicle when in reverse Manufacturer (Tesla) service ticket opened and closed as “resolved with memory reset” without follow-up if problems still occur

NHTSA complaint #11472049 — an unverified report by a vehicle owner.

VEHICLE SPEED CONTROL

- when using TACC / "autopilot", especially when cruising at speed limit on the rightmost lane of the highway, i have experienced quite some occurrences of "phantom braking". this happens especially more frequent when approaching freeway on ramps (even with no incoming vehicle) and when there is vehicle parked on the right shoulder. - the automatically actuated brake really shocked me. if i hadn't reacted quickly enough to step on the accelerator pedal, i would had been rear ended really badly. - i thought that was a one off situation, but since it happened more than once and now that this issue has become headlines, i think it needs to be seriously investigated and fixed. - i have reported this issue to TESLA. the service manager of the local service center promptly responded that unfortunately this is a software issue which is still in "beta". - vehicle did have problem with the left repeater camera which TESLA replaced as goodwill. but i believe that was not the cause of the "phantom braking" episodes. the vehicle was purchased with the (now $12k) "Full Self-Driving" package. now, almost 6 years later, the development of the software is still not done. TESLA promised to upgrade the cameras suite, but several requests of service were cancelled due to, i believe, lack of parts, and/or they need to upgrade the MCU to be able to deploy the latest FSD package. i appreciate TESLA efforts to push the boundary of ADAS to reach full autonomy. i just wish they communicate better to the early adopters and provide us all with clearer timelines (with best/worst case scenarios). (i also appreciate my local TESLA service manager for responding quickly to my initial report of concerns. i acknowledge that completely fixing the issue is beyond his control at this time.) (date provided in this report is approximate, i think TESLA can review the logs of such emergency braking occurrences)

NHTSA complaint #11453040 — an unverified report by a vehicle owner.

VEHICLE SPEED CONTROL

Instrument cluster screen was suddenly black despite the center touchscreen being on. I can't read speed meter, winker, transmission, and tire pressure.But the car moves. I have never hard that Most of Vehicles (Toyota,GM,Ford etc')have instrument screen is Black . I'm not doing any harm, no accidents. Tesla gave the invoice is $3235.96

NHTSA complaint #11434891 — an unverified report by a vehicle owner.

VEHICLE SPEED CONTROL

I was stopped at a red light, left signal on, when the car suddenly accelerated forward through the intersection in an aggressive 0-60 kind of start. I braked safely and was about to execute a U-turn a minute or two later when the car bolted forward again. There was no traffic other than the car behind me at the light, thankfully. There were no warnings or other signals and the car was not operating in AutoPilot. I reported the incident immediately to Tesla and the car is now out of state in their custody while an escalated investigation is conducted. They have, however, told us that the car is safe to drive and that it is not possible for this to have occurred. They also assert that all sudden acceleration cases to date have been related to AutoPilot and all have been driver error.

NHTSA complaint #11431049 — an unverified report by a vehicle owner.

VEHICLE SPEED CONTROL

Sudden unintended acceleration: When pressing the brake on uneven paved roads the vehicle will suddenly accelerate while my foot is on the brakes. This has been an ongoing issue since I received the car and I was told this has to do with regenerative braking but it is definitely a safety issue. There are two commonly visited places on the freeway where this happens to me so I can definitely demonstrate the problem if needed.

NHTSA complaint #11422835 — an unverified report by a vehicle owner.

VEHICLE SPEED CONTROL

WHEN STATIONARY OR IN MOTION, BOTH ON CITY STREETS AND HIGHWAYS, AND EVEN TURNING THE FOLLOWING IS TRUE. THE CENTER INFOTAINMENT STACK BECOMES COMPLETELY FROZEN AND UNUSABLE. FOLLOWING THIS, IT WILL AUTOMATICALLY RESTART, HOWEVER DURING THIS ENTIRE TIME, VITAL SAFETY FEATURES CONTROLLED THROUGH THE CENTER INFOTAINMENT STACK ARE UNAVAILABLE, INCLUDING BACK UP CAMERA FUNCTIONALITY. I HAVE APPLIED FOR THE WARRANTY PROGRAM TESLA HAS FOR REPLACING THE MCU1, HOWEVER, EACH TIME THEY INFORM ME MY CAR DOES NOT MEET THE REQUIREMENT WITHOUT ELABORATING ANY FURTHER. HOWEVER, THIS IS CLEARLY A SAFETY ISSUE THAT THEY ARE IGNORING.

NHTSA complaint #11390231 — an unverified report by a vehicle owner.

VEHICLE SPEED CONTROL

MY VEHICLE HAD THE MCU FAILURE THAT IS WELL KNOWN. NO BLINKERS, NO AUTOPILOT, NO AC/HEATING, NO DEFOGGER ETC ETC. JUST BLANK SCREEN. SOUNDED LIKE THE RECENTLY ACKNOWLEDGE ISSUE WITH THE EMMC BUT TESLA REQUIRED ME TO PAY FOR AN UPGRADED MCU SAYING MY ISSUE WS NOT COVERED BY THE EXTENDED WARRANTY.

NHTSA complaint #11375147 — an unverified report by a vehicle owner.

VEHICLE SPEED CONTROL

THE EMMC FLASH MEMORY IS FAILING, LEADING TO THE MAIN SCREEN BLACKING OUT FOR SEVERAL MINUTES HAPPENS RANDOMLY WHILE DRIVING AND WHEN AT STOP AND WHEN THE CAR IS BOOTING UP. THIS PREVENTS ADJUSTMENT OF SEVERAL COMPONENTS INCLUDING CLIMATE CONTROL, MANUAL LIGHTING, CRUISE CONTROL/AUTOPILOT, MUSIC IT HAS BEEN HAPPENING FOR OVER A MONTH, PROGRESSIVELY GETTING WORSE. SERVICE CAME OUT TO JUST RESET THE 12V AND UPDATE THE SOFTWARE AND SAID EVERYTHING IS GOOD BUT IT DEFINITELY IS NOT BECAUSE ITS GETTING WORSE DAY BY DAY

NHTSA complaint #11361923 — an unverified report by a vehicle owner.

VEHICLE SPEED CONTROL

THE EMMC FLASH MEMORY IS FAILING, LEADING TO THE MAIN SCREEN BLACKING OUT FOR SEVERAL MINUTES BOTH WHILE DRIVING AND WHEN AT STOP AND WHEN THE CAR IS BOOTING UP. THIS PREVENTS ADJUSTMENT OF SEVERAL COMPONENTS INCLUDING CLIMATE (FANS, DEFOG, AC), MANUAL LIGHTING, CRUISE CONTROL/AUTOPILOT, ETC. IT HAS BEEN HAPPENING FOR OVER A MONTH, PROGRESSIVELY GETTING WORSE. TESLA IS TELLING US WE HAVE TO REPLACE THE FLASH MEMORY (~$500, BUT THERE IS NO GUARANTEE THE PROBLEM WON'T REOCCUR), OR REPLACE OR UPGRADE THE MCU (~$1500-2500). THE CAR WAS RECENTLY UPGRADED TO FULL SELF DRIVE HARDWARE (PAID FOR IN 2016) AND OTHERS HAVE REPORTED THAT THIS CONTRIBUTES TO THE MEMORY DYING, SO WE CONTEND THIS DESIGN FLAW SHOULD BE REPAIRED BY TESLA FOR FREE.

NHTSA complaint #11352816 — an unverified report by a vehicle owner.

VEHICLE SPEED CONTROL

THE MAIN COMPUTER TURNS RIGHT OFF A COUPLE TIMES A DAY. WHEN THIS HAPPENS WHILE DRIVING, MOST SAFETY FEATURES ARE DISABLED AND THE CARS ELECTRONIC STOP WORKING. THE CPU IS KNOWN TO HAVE ISSUES BECAUSE A CHIP INSIDE GETS OVERLOADED AND DOES NOT CLEAR ITSELF PROPERLY. A RECALL SHOULD BE HAD TO REPLACE THIS CHIP THAT DOES NOT REMOVE THE CASHE PROPERLY.

NHTSA complaint #11341047 — an unverified report by a vehicle owner.