2021 Tesla Model Y Problems

Separately, the system could not hold a consistent speed on open highway with no vehicle ahead. It would surge from a set 70 mph to roughly 72-73 mph and then drop back, repeatedly, producing a pulsing acceleration and deceleration. The system also hesitated frequently and issued repeated audible alerts without an identifiable hazard present. I previously filed a complaint regarding phantom braking on this same vehicle (ODI number 11450326, filed February 4, 2022), which described nearly identical behavior triggered by trucks on the same Georgia-to-New Jersey route. That complaint concerned FSD/Autopilot software from 2022. The behavior described here occurs on Tesla’s current v14 Lite software released to Hardware 3 vehicles in July 2026. The defect has persisted across more than four years and multiple software generations. Unexpected hard braking at highway speed with no hazard present creates a rear-end collision risk to my vehicle and to following traffic.

On June 7, 2026, my 2021 Tesla Model Y with approximately 37,131 miles became completely unresponsive and could not be driven. Tesla Mobile Service replaced the 12V low-voltage battery on June 11, 2026. The official repair notes stated that the battery was replaced, proper operation was verified, there were no active alerts, and the vehicle was in excellent condition. Shortly after this repair, multiple vehicle systems stopped functioning, including all cameras, navigation/GPS, and software/firmware updates. Tesla Service later diagnosed the vehicle as requiring replacement of the HW3 vehicle computer at a cost of approximately $3,066. The loss of camera functionality disabled or affected multiple driver assistance features that rely on the camera system. The vehicle has been unavailable for approximately one month while awaiting repair. During discussions with Tesla Service regarding the diagnosis, I was informed verbally by the Service Manager that they see similar HW3 computer-related issues on a regular basis (approximately every other week). I cannot independently verify that statement, but I am including it because it contributed to my concern that this may not be an isolated incident. I am not asserting the root cause of the failure. I am submitting this complaint because the loss of the vehicle’s camera system and related driver assistance functionality may represent a potential safety concern, and I believe NHTSA should be aware of this incident.

Phantom brake incident today,5/26/26. Traveling 35mph, brakes slammed on for no apparent reason. Seatbelt tightened and my head launched forward. Neck is very strained.

I was entering the on-ramp to [XXX] , from [XXX] , to merge onto the freeway east bound towards [XXX] , when my Tesla suddenly lost all power, the brakes did not work and the power steering completely failed making it feel like it was locked up. I was traveling approximately 40-50 mph at the time nearing the gore point to merge onto the freeway. Fortunately I was in the inside lane and I rolled to a stop away from other vehicles. I could not steer at all. Had I been completely on the freeway, I could have been rear ended badly. I had my two young boys in the vehicle with me, both [XXX] and [XXX] . We were completely trapped in the vehicle with no power. My [XXX] old remembered to use the manual latch to get out. I opened my door manually and It broke my driver side glass window. Vehicles were passing us rapidly to enter the freeway. I called my husband who is a police officer and he came and picked us up. We called Tesla who said they could not get a read on our battery whatsoever. We called a tow company and had this vehicle towed to Tesla repair center in [XXX] , after reporting our traumatic event. They claim our warranty is expired, but our vehicle only has 37,638 miles and should be covered under the 8 year, 120,000 mile warranty that covers a major malfunction like this. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

On 8/10/26, my Tesla experienced a complete low-voltage electrical failure while parked at my home. I owned the vehicle 34 days and put 1,054 miles on it after purchasing it directly from Tesla as a pre-owned vehicle. I entered the driver's seat, and closed the driver's door. The center touchscreen was completely black, the vehicle would not power on, and the Tesla mobile app could not control the vehicle. I attempted to exit the vehicle, but the electronic driver's-door release would not operate. My husband was outside the vehicle and was also unable to open the driver's door from the exterior. The outside temperature was approximately 80 degrees, and the interior of the vehicle became increasingly warmer. For several minutes, we attempted to open the driver's door, lower a window, or restore power without success. I had not been shown or instructed on the location or operation of the manual emergency door release when Tesla delivered the vehicle. I ultimately had to climb over the center console to the passenger side and push the passenger door open with both feet. Tesla Roadside Assistance was contacted and the vehicle was towed to the Tesla Service Center. Tesla's 8/12/2026 service record documents the concern as "Parked vehicle unable to power on" and states that the technician found the 12V battery inoperative. Tesla replaced the 12V lead-acid battery assembly. During the same service visit, Tesla also replaced the left-front door glass and upper trim. Tesla separately verified that the passenger-side window had come out of its track and scratched the trim and documented that the cause was a loose and improperly seated front-right door trim panel. I received no warning on the vehicle display or through the Tesla app before the low-voltage battery failed. My primary safety concern is that loss of low-voltage power disabled the normal electronic means of exiting the driver's door while I was inside the vehicle, with no advance warning.

The high-voltage battery failed unexpectedly shortly after the warranty expired (with only 9,000 miles past warranty). Tesla Service confirmed a main high-voltage battery defect and quoted a full battery replacement. A sudden high-voltage battery failure causes a complete loss of propulsion/power, creating a severe collision and safety hazard on public roads. There were no prior warnings until the system suddenly failed and rendered the vehicle inoperable. The vehicle is currently available for inspection. This appears to be a premature latent defect in 2021 model high-voltage battery packs.

The contact owns a 2021 Tesla Model Y. The contact stated that while the vehicle was parked, there was an abnormal sound while turning the steering wheel to the left or the right. There was no warning light illuminated. The vehicle was taken to an independent mechanic, and the contact was informed that the lower and upper control arms were failing. The contact was informed that the lower and upper control arms needed to be replaced. The contact was advised to take the vehicle to the dealer. The dealer was made aware of the failure. The contact stated that a service appointment was scheduled. The vehicle was not repaired. The manufacturer was made aware of the failure. The failure mileage was approximately 100,000.

Vehicle can become difficult to steer in certain situations

Front suspension makes creaking noises for a few months now. The car only makes noises when steering wheel is turned while reversing and sometimes when turning. Took the car to Tesla and they told me since the sound is not that loud and not really reproducible, then to bring it back when it gets worse. My car only has 34k miles on it.

Noises started coming from suspension and I had an independent shop verify the issue. The lower control arm had separated from bushing and rubbing against subframe.

My 2021 Tesla Model Y HW3 experienced complete failure of all cameras, GPS, Automatic Emergency Braking, and Adaptive Cruise Control following the installation of software update 2026.8.6.1 — the OTA remedy update issued by Tesla for NHTSA Recall 26V283000. The vehicle was fully functional prior to this update. The failure was confirmed and reproduced by Tesla's authorized service center. The service advisor confirmed in writing: "During the update, the computer failed to reboot properly. We attempted to perform a 12V reset but unfortunately it is still stuck in the boot loop state." The Autopilot ECU (Primary/Turbo A) is stuck in a permanent boot loop and cannot be recovered by software means. Safety impact: All cameras including rearview camera are completely non-functional. Automatic Emergency Braking and all ADAS features are disabled. The vehicle cannot safely detect obstacles or pedestrians. GPS navigation is frozen. Tesla has confirmed the computer requires replacement but is classifying it as a customer-pay repair citing expired warranty, despite the failure occurring during Tesla's own recall remedy software deployment. This vehicle meets every technical criterion of Recall 26V283000 — HW3 hardware, 2021 Model Y, software version 2026.8.6.1, complete camera failure — but does not appear in the recall VIN database. I am requesting NHTSA review whether this VIN should be included in recall 26V283000 or a related investigation.

The rear camera has failed posing a safety issue when reversing the vehicle.

This is for a recurring front passenger safety restraint system defect on a 2021 Tesla Model Y, VIN [XXX]. The defect has now resulted in at least six service visits or invoices involving the same front passenger restraint / occupancy system concern, and Tesla has now charged $1,582.18 for another repair involving the front passenger seat cushion trim and seat back trim even though prior repairs did not permanently correct the condition. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Hello, We have 46224 miles on the car currently. A couple of weeks back the whole battery died. Tesla replaced the battery and we picked up the car this past Friday, the XXX. After picking up the car the driver's seat does not slide. I looked it up online on the Tesla website as well as on the app and at both the places it was strongly recommended to bring the car back to Tesla as the problem was very very likely secondary to the battery replacement. the seat does not move at all. When I spoke to customer service at out local Tesla dealership in [XXX], the earliest date they could provide us was in the first week of August! This is an urgent issue. We happen to be away on vacation that week. So we were told to review the cost estimate and then find a date on the app to bring the car in. When I questioned the estimate price, I was told that this was the worst case scenario. But the invoice clearly states Calibration, and 3 prices for a switch package all amounting to $364.45 with tax!!! Again I questioned this huge charge, considering the battery replacement and I was told almost rudely, "That does not seem to be the issue." Just not right!! INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

My 2021 Tesla Model Y (VIN: [XXX]) experienced a serious safety malfunction during a 12V low‑voltage failure. When the vehicle displayed the 12V alert, it became non‑functional. Upon entering, no systems were operating. When I pressed the brake pedal, the interior lights flashed and both front windows began moving up and down automatically without any input. This uncommanded movement caused both windows to shatter violently inside the cabin. The glass broke along the lower section of the window, consistent with internal mechanical stress caused by the window motor cycling during a fault. This was not external impact. I have photos documenting the breakage pattern. This is a safety defect. Automatic window movement during electrical failure poses a risk of injury. Additionally, even if a customer closes a door with the window raised, the glass should not shatter. Tesla vehicles are designed with automatic window indexing and motor resistance protection. The system should adjust the window position to prevent breakage. The fact that the glass shattered indicates a failure of Tesla’s safety logic and window indexing system. Tesla denied responsibility and claimed “misuse,” but could not provide system logs to support this claim. Tesla also stated customers must ensure windows are lowered before closing doors, but this requirement does not exist anywhere in Tesla’s manual. Tesla’s explanation does not address the automatic window movement that caused the breakage. This malfunction presents a clear safety hazard: unexpected window movement, glass shattering inside the cabin, and risk of injury to occupants. I request NHTSA investigate Tesla’s window indexing behavior during 12V failures, the failure of safety protections, and the risk of glass breakage caused by system‑initiated movement. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

I am reporting two unresolved safety-related defects on my 2021 Tesla Model Y (VIN: [XXX] ) that occurred following paid service at Tesla's League City Service Center on 04/16/2026 DEFECT 1 — COMPUTER AND SENSOR SYSTEM FAILURE: The vehicle's onboard computer cuts in and out intermittently. Sensors fail during operation and the problem worsens significantly in high-temperature conditions. Tesla vehicles rely on their computer and sensor systems for core safety functions including collision avoidance, autopilot, and driver assist features. Intermittent failure of these systems while operating the vehicle is a safety hazard to the driver and the public. DEFECT 2 — GLOVE BOX INOPERABLE: The glove box does not open following Tesla service. The glove box in Tesla vehicles houses key vehicle documentation and is integrated into the vehicle's locking and security system. I paid $2,497.50 for service on [06/16/2026]. Both defects were either caused or left unresolved by that service. I have notified Tesla service staff directly and followed up multiple times over more than four weeks. Tesla has not responded, has not scheduled any repair, and has not refunded my money. I am filing this complaint because (1) the sensor and computer failures present an active safety risk during operation, (2) Tesla has ignored all attempts to resolve this, and (3) public reviews indicate this is a pattern affecting multiple consumers. I request that NHTSA investigate and determine whether a safety defect investigation or recall is warranted. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The high-voltage battery failed unexpectedly shortly after the warranty expired (with only 9,000 miles past warranty). Tesla Service confirmed a main high-voltage battery defect and quoted a full battery replacement. A sudden high-voltage battery failure causes a complete loss of propulsion/power, creating a severe collision and safety hazard on public roads. There were no prior warnings until the system suddenly failed and rendered the vehicle inoperable. The vehicle is currently available for inspection. This appears to be a premature latent defect in 2021 model high-voltage battery packs.

The vehicle’s secondary Autopilot Processor / car computer is internally faulted and stuck in a continuous wake/shutdown loop. This causes severe standby battery drain (~20 miles of range lost per day while parked) and completely prevents all over-the-air software updates - including federally mandated safety recall remedies. On April 4, 2024, Tesla Service diagnosed the fault and linked it to the drain and inability to update. On the same visit, Tesla added two safety recalls (23V-838 Autosteer controls and 24V-051 Brake/Park/ABS indicators) to the work order. They then demanded ~$3,000 customer payment for computer replacement before the recalls could be performed. After I declined the paid repair, Tesla marked both recalls as “completed” via software update despite the same invoice stating the vehicle could not receive updates and remained on software version 2023.38.9 (which predates both remedy firmwares they claimed was installed). Tesla is effectively paywalling federally required safety recall remedies by requiring the customer to first pay for computer replacement first. Two additional recalls remain open (21V-389 seat belt fasteners and 24V-554 hood latch). The problem has been confirmed and documented multiple times by Tesla Service.

Recurring front passenger safety restraint system fault causing incorrect occupant detection for airbag deployment. Failed and was ‘repaired’ 3 times since 2024, including 2 consecutive failed repairs of the same part within the last 3 months. Tesla service advisor also mentioned informally this is a common issue. Tesla is now refusing further no-cost repair despite both recent repairs remaining under Tesla’s own parts warranty.

We were trying to drive home and the middle seat belt, where my youngest child was sitting, would not latch. it would 'click' in, but if you pulled on it, it would pop out. This was terrifying because we had to drive home on a 2-lane highway with oncoming traffic. I checked online and found that many others have reported this issue because the seat belt latch sits rigidly upright in a divot in the seat, which acts as a funnel to direct any crumbs or dropped items to go into the seat belt latch, which then apparently causes the issue. This is a death trap design for children, because of course children drop things and make messes all the time, and applies to all three of the seat belt latches in the back. What is even worse about this issue is that as a parent I listen for the Click to know they have buckled, and I also check the seat belt indicator on the dash screen. Even when this model Y seatbelt latch isn't going to hold the seatbelt in place, it makes the Click sound and also shows as latched on the dash screen, giving parents a false sense of security. It looks like no children have been injured or killed yet because of this design flaw, but please do not wait for that to happen. Please make them fix this issue immediately before tragedy strikes a family. Please watch the video I linked to in the PDF to see how the seatbelt clicks into place, but then can be pulled free by a firm tug on the seatbelt.

Description of Safety Incident:The front passenger safety restraint system failed, displaying the warning alert: "Seats - Front passenger safety restraint system fault / Service is required." This alert disables or suppresses the front passenger airbag and seatbelt restraint system, creating a direct safety hazard for front-seat occupants.Service History & Recurring Defect:On February 26, 2025 (at 50,596 miles), Tesla Service Center diagnosed an open circuit in the front passenger seat harness/back frame. Under Service Bulletin / SRS Warranty, Tesla replaced the front seat back, seat harness assembly (PN: 1489060-03-G), occupancy sensor (PN: 1099592-00-F), and SBR sensor clip (PN: 1130363-00-B). On August 1, 2026 (at 63,583 miles)—less than 13,000 miles after the initial replacement—the exact same safety restraint system fault recurred.Safety Concern:The front passenger seat harness and Occupant Classification System (OCS) appear to suffer from design strain, pinching, or premature wiring degradation during normal seat movement. Because this defect disables critical safety restraint components and recurs shortly after replacement, I am submitting this report to request a federal safety review and investigation regarding Tesla Model Y front passenger seat wiring harness integrity.

Recurring front passenger safety restraint system fault causing incorrect occupant detection for airbag deployment. Failed and was ‘repaired’ 3 times since 2024, including 2 consecutive failed repairs of the same part within the last 3 months. Tesla service advisor also mentioned informally this is a common issue. Tesla is now refusing further no-cost repair despite both recent repairs remaining under Tesla’s own parts warranty.

Vehicle can become difficult to steer in certain situations

Tesla model y is experiencing a front passenger airbag sensor failure (OCS) covered by factory bulletin SB-23-20-002 alongside TMPS and EAEB alerts. Tesla corporate resolutions is refusing to fix these safety system failures with out charging $1400 out-of-pocket, citing warranty expired.

I parked my Tesla vehicle in a friend’s driveway. When I returned and opened the driver’s door, I entered the vehicle and attempted to put it into Drive. At that point, the vehicle display went completely blank and the vehicle became inoperable. I then attempted to open the door from inside the vehicle, but the door would not open and I was unable to exit the car. I was effectively locked inside the vehicle. I contacted Tesla customer support and remained on the call for approximately 1.5 hours before receiving assistance. Tesla customer support confirmed that the issue was caused by failure of the 12-volt battery. At the time of the incident, the outside temperature was below 0 degrees centigrade. The incident occurred in Cedar Rapids, Iowa. There was no prior warning or notification from the vehicle or the Tesla mobile app indicating that the 12-volt battery was at risk of failure. The failure resulted in loss of vehicle function and inability to exit the vehicle, creating a serious safety concern.

I am filing this complaint regarding a high-voltage battery defect in my 2021 Tesla Model Y. The vehicle has been diagnosed by Tesla Service, and both the technician and service advisor confirmed that the high-voltage battery has an internal short. This is a critical failure involving the primary energy/storage system of the vehicle. Despite acknowledging the internal failure, Tesla is denying warranty coverage for the battery replacement. They have stated that failure is internal, and is not caused by anything external The failure was not caused by an accident, environmental exposure, or improper use. This appears to be a component-level defect within the 2021 Tesla Model Y battery packs Considering Tesla has issued prior service bulletins for Model Y high-voltage battery quality issues in adjacent model years, this may indicate a broader pattern of battery defects. They are trying to charge people over $12,000 for battery replacements that should be covered by tesla due to poor workmanship and materials used. Many have had to have multiple battery packs replaced.

The high-voltage battery failed unexpectedly shortly after the warranty expired (with only 9,000 miles past warranty). Tesla Service confirmed a main high-voltage battery defect and quoted a full battery replacement. A sudden high-voltage battery failure causes a complete loss of propulsion/power, creating a severe collision and safety hazard on public roads. There were no prior warnings until the system suddenly failed and rendered the vehicle inoperable. The vehicle is currently available for inspection. This appears to be a premature latent defect in 2021 model high-voltage battery packs.

After charging the vehicle threw error code “BMS_a079 Unable to charge - Maximum charge level reached Reduced maximum charge level - Schedule service”. The car would no longer charge and had to be taken in for service. Tesla advised the High Voltage battery needed to be replaced. Replacing the High Voltage battery resolved the issue.

Low beams are too bright and aimed too high, constantly blinding other drivers. Automatic high beams are always turning on and will not automatically turn off when another vehicle is detected.

We Americans need you to stop auto manufacturers from using blinding headlights on their cars. This will cause accidents and you will be liable for allowing this to begin with.

A little background information, on Dec 2023 I installed 4 new Hankook Ion Evo AS (255/45R19) for my Tesla model Y at the Correa Tire shop in Dorado Puerto Rico and the manufacture date on those tires was 4422 and at the time the car had close to 30k miles.  On April 2025 one of the tires broke and I replaced it at the same place with the same tire model.  Less than a month after the new tire was installed, while riding on the highway at close to 65mph the recently replaced tire completely broke off leaving only the sides and the rest of the tire flew off the car (see pictures attached).  This happened suddenly with no previous indication or car notification of any issue with the tire.  Fortunately, I was able to stop the car without losing control and apparently the tire did not hit other oncoming cars.  This was a very scary situation, which could have resulted on a serous and even fatal accident.  When I checked the new tire, or what remained of it, I noticed it had the same manufacturing date (4422) as the tires I had replaced in 2023. The next day I went to the tire shop and explained the incident and they informed I had to buy a new tire while they investigated the situation and if there was any issue with the tire. At that time I also opened a complaint with Hankook US. After waiting various weeks for a response, and expecting reimbursement for the damage tire, I have not received any information from the tire shop and Hankook said they did not receive a claim from the tire shop.

The contact owns a 2021 Tesla Model Y. The contact stated that while driving on several occasions at various speeds, the TPMS warning light illuminated, with the “TPMS Fault” message was displayed on the instrument panel. The vehicle was taken to a dealer where it was diagnosed with TMPS failure. The vehicle was not repaired. The contact associated the failure with an undisclosed recall. The manufacturer was notified of the failure. The failure mileage was approximately 94,000.

The contact owns a 2021 Tesla Model Y. The contact stated on two separate occasions while idled in a parked position and the brake pedal depressed, he shifted into reverse position and the vehicle inadvertently lunged forward approximately 5ft without acceleration. The vehicle then performed as normal. The contact then stated that on a separate occasion while idled in a parked position and the brake pedal depressed, he shifted into drive without the accelerator pedal depressed and the vehicle lunged forward 15 ft without warning. As a result, the contact crashed into a restaurant window. No warning lights was illuminated. No medical attention was required. A police report was filed. The vehicle was currently being towed to the dealer. The vehicle was not diagnosed. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was approximately 15,000.