Two problems related to 12v/24v/48v battery have been reported for the 2021 Tesla Model Y. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2021 Tesla Model Y based on all problems reported for the 2021 Model Y.
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.