2021 Tesla Model Y: doors won't lock, open or latch

Filed Aug 27, 2026 · Electrical · CA

On August 27, 2026, the 12V/low-voltage battery in my Tesla completely failed without any prior low-voltage warning displayed on the screen or sent to the mobile app. After placing my infant/toddler in their car seat in the rear and closing the door, the vehicle's electronic systems shut down entirely. The electronic door handles and key access became completely inoperative from the outside, locking my child inside the vehicle with no way for me to open the doors or retrieve them. The manual override releases are inaccessible to a young child buckled in a car seat, and the vehicle provided zero advance warning that the low-voltage battery was at critical failure. This severe design flaw creates an immediate, life-threatening entrapment hazard.

Filed Jan 12, 2026 · Electrical, Engine · IA

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.

Filed Nov 5, 2025 · Electrical, Locks · 60,000 miles · OH

The contact owns a 2021 Tesla Model Y. The contact stated that while driving uphill at an undisclosed speed, there was an abnormally loud pop coming from the vehicle. No warning light was illuminated. In addition, the contact stated that the vehicle lost automotive power and rolled away in reverse downhill towards oncoming traffic. The contact was able to avoid oncoming traffic and reverse onto the shoulder of the road; however, the driver’s side rear driver’s door failed to unlatch or open as intended while using the interior door handles. A local tow truck arrived on scene, and the passenger’s side door failed to open as intended with the exterior door handle. The vehicle was towed to a local dealer, where it was diagnosed, and determined that the 12-Volt battery needed to be replaced. The vehicle was repaired but remained at the local dealer. The manufacturer was made aware of the failure. The failure mileage was approximately 60,000.

Filed Nov 3, 2025 · Body, Electrical · CA

This incident appears to relate to the federal safety agency ongoing investigation at Tesla's low voltage battery system failure causing door handle malfunction. (September 26, 2025) 2021 Model Y front and rear doors (all four) was locked down with a seven years old child inside the car at home garage driveway. Mom unable to open up doors from exterior. A few hours later, left driver door was able to open but other passengers door remained locked down. (October 2, 2025) Sent Model Y to Tesla service center and identified low voltage battery and vehicle controller failure. Tesla technician replaced those electrical components with service fee charged.

Filed Sep 19, 2025 · Body, Electrical · CA

On July 5, 2025, I entered my vehicle parked in my home garage and the door latched shut. Upon putting my foot on the brake. Center screen was blank (did not power on). I attempted to press the unlock button on the door and there was no sound from the motor to open the door. The door was still locked from the inside of the vehicle and I was locked inside. I waited around 5 minutes (after attempting to call my wife to try to let me out of car and tried the open the drivers door again by pressing the exit button. The door unlatched by normally the window rolls down partially to exit. This time the window did not move and I have to force the door open by pressing my shoulder hard against the interior door panel. I hear a popping sound from inside the door and the window would not roll up. I did not drive the vehicle fearing that the car would not start and my family could be trapped inside the car. I created an appointment for Tesla service for July 7, 2025 for the door locks and the driver's window that would not roll up completely and also would roll down but return to a 70% rolled up position automatically. I did received an error warning on the late evening of July 6, 2025 that the 12 volt battery voltage was low on the main center screen of my vehicle. I took the vehicle to Tesla service on July 7, 2025 and it was determined that the 12 volt auxiliary battery that was faulty and my window was repaired and recalibrated. I never saw an alert for the 12 volt auxiliary battery low voltage prior to when I was locked inside the car.

Filed Sep 18, 2025 · Body, Electrical · CA

- Open rear passenger door and secured child in car seat. - Try to open driver side rear passenger door - which would not open. - Tried to open rear passenger door where child was in, and the door would not open. - Car was powered off and none of the doors opened. - After approximately 5 minutes, front passenger door opened, and child was removed form the car through the front door. - Requested roadside assistance with the diagnosis of 12V battery failure. - No warning that 12V battery was near end of life - Software updated the previous night.

Filed Sep 17, 2025 · Body, Electrical · NJ

On [XXX], the car was parked at my regular parking garage. The valet entered to the car to bring it down for pick up. After he entered, the power on the vehicle went out and the door would not open. He did not know about the manual door release. I walked up to see what the delay was and found him locked inside. The car was parked on an upper floor and the it was over 100 degrees in the car. We contacted 911 but eventually found the door release. Tesla was notified and towed the car several hours later. They jumped the car to get it open. It seems that the 12V battery had died without warning. Notes from Tesla Concern: Car won't power on/enter drive - Case MergedCustomer States : vehicle will not power on or drive Originating Phone Number : [XXX] IVR Context - No Results. Please check AutoDiag. | Repair Notes: Verified customer concern. Diagnosed and Found An internal short in the 12v battery: One or more of the six internal series cells has been bridged, resulting in five or less cells now being in series, reducing the voltage by at least 17%. This resulted in the e-fuse for the VCLEFT to trip and shut down the left side of the vehicle. Replaced 12V Battery. Proactively Perform 12v Disconnect procedures. Update vehicle software to the latest available firmware. Performed Validation Test Drive. Vehicle operating currently within Tesla Specifications. Verified Proper Operation. No further action is needed at this time. Correction: General Diagnosis Correction: Battery - 12V (Lead Acid) (Remove & Replace) - Remove and Replace INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Aug 22, 2023 · Electrical, Fuel system · AZ

I was accelerating out of a parking lot and was up to 30 MPH when the vehicle suddenly shut down and the rear end began shaking. The control screen went completely black/off. I could not accelerate at all. A semi truck was coming from behind and the vehicle came to a sudden stop within a few seconds. I could not coast and pull into a parking lot. It felt like an emergency brake was turned on or the back wheels locked up. I had to turn into the center turn lane. Vehicle doors would not open and hazard lights would not turn on. Opened manual door handle and forced my way out. Shut door as I ran to safety and the window cracked. I could have been severely injured if that semi hit me from behind and especially if this would have happened on the freeway. Very scary that a car can suddenly shut off like that while driving. After repair I was informed that the 12V battery had failed. They said it’s very rare and they have not seen that happen while the car was driving.

Filed Aug 20, 2023 · Electrical · NV

Model Y Battery Problem. The battery died while my baby was inside the car. Phone app, remote control, key card, etc. did not work. We live in Las Vegas & August is very hot. Today is Sunday and nobody in Las Vegas was able to help. Customer Service took over 30 minutes just to connect, and was no help. I got transferred around numerous times because they have no solution. The frustrating part was that tesla employee wasn't willing to help. I understand that they might not be able to do anything, but their attitude and the unwillingness to help was just shocking. One of them even told me that there's nothing they can do and I need to contact someone in Las Vegas. Other employee who had no knowledge of the car told me to jump start the car. He gave me an attitude when I told him I cannot open the frunk. He told me to read the manual to manually open the frunk. I replied stating I already did read the manual already and do not have the tool to pop open the side frunk. I'm just disappointed with being transferred around and the waste of time while my child was stuck inside the car. Currently, there's no manual door unlock from the outside! There's no manual frunk or trunk unlock either from the outside. All Japanese cars, including hybrid and electric has emergency door lock built into their car. I believe this needs to change for Tesla, as it is putting kids and babies in danger. Thank you for listening to my concern.

Filed Jul 9, 2023 · Electrical · FL

1.What component or system failed or malfunctioned, and is it available for inspection upon request? After closing the passenger side door, The 12v battery that controls the Tesla cabin died without any prior warning or car notification that it needed to be replaced, as a result the car instantly powered down , disabling the a/c, windows and door locks and we were unable to open the doors to access the car. 2. How was your safety or the safety of others put at risk? At the time of the event no, just our personal belongings were trapped inside the car but as a parent of a small child I usually put my child in her car seat first and close the door then get in my seat, if this had occurred with my child being in the car , my only option would be to smash in the window to get her out as the car has no back up system to open the car doors if the 12v battery dies. 3. Has the problem been reproduced or confirmed by a dealer or independent service center? Yes , the tesla had to be towed to the service center we’re they had to run system test and replace the 12v battery. 4. Has the vehicle or component been inspected by the manufacturer, police, insurance representatives or others? Yes by Tesla , they ran test and determined that the 12v battery was the issue. 5. Were there any warning lamps, messages or other symptoms of the problem prior to the failure, and when did they first appear? No warnings or notifications were given prior , teslas are suppose to receive a notification to alert the owner the battery needs to be replaced as their cars have a lot of 12v battery drain.

Filed Apr 12, 2023 · WA

The plugs and door latches on both rear doors have repeatedly failed, endangering the safety of my family and other occupants of the vehicle. I am concerned about the safety of drivers and passengers and believe that this issue requires your immediate attention. The plugs and door latches on both rear doors of my Tesla Model Y have failed repeatedly. The failure of the door latches and plugs has repeatedly endangered the safety of the occupants, particularly children who may be unable to exit the car in an emergency situation. The door trim falls out of place, locking the occupants in the back of the car. This problem has been reproduced and confirmed by the dealer, as evidenced by my car's multiple visits to the service center for the same issue. Attached are the documents, they are all for the same issue - though tesla classified them inconsistently. The vehicle has been inspected by the service center, but the problem has persisted despite their attempts to fix it. There were no warning indicators prior to the failure, making the problem even more dangerous as it can occur without the driver's knowledge. I am deeply concerned about this safety issue, particularly given that the 2021 Tesla Model Y is a popular vehicle that is widely used by consumers across the United States. It is vital that action is taken to address this issue and ensure that all affected vehicles are recalled and repaired. I strongly urge the federal safety agency to investigate this issue and require a recall of all affected vehicles. The safety of drivers and passengers must be the top priority in the design and manufacture of all vehicles, and it is clear that the Tesla Model Y's rear door latches and plugs are failing to meet necessary standards of safety.

Filed Jan 28, 2023 · Body · NY

Rear doors are stuck and locked shut, the known defect is on youtube with experts explaining this safety flaw where the door handles get stuck and locked and now TESLA REFUSING TO SERVICE.