12v/24v/48v Battery Problems of Tesla Model Y

On August 20th, 2025 at 2:50pm, my eight-month-old infant was trapped inside my Tesla Model Y for approximately 30 minutes due to a critical systems failure. The vehicle experienced an error with the 12v battery that rendered the doors, windows, and trunk completely inoperable, preventing any means of access or escape. My infant was flushed, diaphoretic, and crying while stuck in his car seat with an indoor temperature exceeding 104 degrees fahrenheit. Despite all attempts to override the system, the car remained locked, and the battery dead, and emergency services had to be contacted. Officers from the santa barbara sheriff’s department, California highway patrol, and montecito fire department arrived on scene and, in order to rescue my baby, were forced to smash a window to gain entry. The police officer was advised by a Tesla representative to do so, as he confirmed there would be no way to override the system to open the doors. My baby was found screaming in a pool full of sweat and was carried to an ambulance, where the paramedic warned me of concerning vital signs and advised me to go to the santa barbara cottage hospital to have his condition assessed and treated, if necessary. I have obtained a copy of the police report (case no. Mto25025051) and will provide it upon request. Tesla confirmed that this problem with the 12v battery is common, nonetheless we were made to pay for a new window and a battery replacement. There were no warning signs leading up to the shutdown and not notifying us of this system failure and the risk involved is complete negligence on behalf of Tesla.

See all problems of the 2021 Tesla Model Y 🔎.

The contact was an attorney calling on behalf of the owner of a 2025 Tesla Model Y. The contact stated that the owner was driving on a neighborhood street at an unknown speed with autopilot engaged when vehicle control was lost. As a result, the vehicle crashed into a traffic light pole where it came to a stop and caught on fire. The owner was unable to exit the vehicle and was pronounced deceased on the scene. The origin of the fire was the lithium battery. The location of the fire was under the front end of the engine compartment where the battery was stored. The fire was extinguished by the fire department. A police report was filed. The vehicle was towed currently in the possession of the police department pending the cause of the crash. The vehicle was destroyed. The light pole was damaged. It was unknown if the air bags were deployed. The manufacturer was not notified of the failure. The failure mileage was unknown.  .

The contact owns a 2021 Tesla Model Y. The contact stated after placing the children in the vehicle, he was unable to enter the vehicle. The contact stated that the vehicle lost electric power while attempting to open the door with the key fob and with the phone app however, the door remained closed. The local fire department was contacted, and the contact was advised to break the window to remove the children from the vehicle. The contact broke the driver's side front window to remove the children as recommended by the fire department. The contact stated that the 12-volt battery had overheated; however, a report was not filed. The vehicle was taken to the dealer, but the vehicle was not diagnosed. The contact stated that the window was replaced, and the 12-volt battery was also replaced. The manufacturer was made aware of the failure. The failure mileage was approximately 72,175.

The contact owns a 2021 Tesla Model Y. The contact stated while driving 20–45 mph on a six-lane highway, the contact attempted a hard acceleration, and there was an abnormal banging sound heard. The battery was disconnected. The pyrotechnic fuse went into failure mode. There were no warning lights illuminated. The vehicle slowed down, pulsated, and then shutdown. The hazard lights, steering, and brake system became inoperable. The brake pedal was depressed to stop the vehicle from rolling. Additionally, while closing the driver's side door, the glass window fractured. The local dealer was contacted and retrieved a system failure with the 12-volt battery. The vehicle was not repaired. The manufacturer was not contacted. The failure mileage was approximately 58,044.