2023 Tesla Model Y power train problems

“On the morning of 8-17, 2026, the vehicle experienced a total electrical power loss and high-voltage system deadlock immediately following an official Tesla Over-The-Air (OTA) software update pushed the previous night. Prior to this remote software update, the vehicle had zero operational issues or warning signs. Right after the update completed, the vehicle became completely unresponsive and undrivable. This issue directly compromised safety by causing a sudden, unpredictable loss of vehicle power and propulsion capability, creating a severe risk of stranded vehicle hazards and secondary collisions. The vehicle was brought to an official Tesla Service Center (Whitestone/Flushing, NY) for diagnosis. The manufacturer’s service center inspected the vehicle and confirmed a high-voltage Power Conversion System (PCS) deadlock failure (Repair Estimate ID issued). The failed PCS component remains at the Tesla Service Center awaiting replacement and is fully available for inspection upon request.”

“COMPONENT/SYSTEM THAT FAILED: The service brakes failed to stop the vehicle. While reverse-parking at low (parking) speed, I applied the brake pedal and the vehicle did not stop as expected, resulting in contact with an object and vehicle damage. The vehicle is available for inspection upon request; it has been preserved and driven only minimally since the event. HOW SAFETY WAS PUT AT RISK: The brakes failed with no warning. Had a person been behind the vehicle, the failure to stop could have caused injury. This is the only vehicle for a family with three children who are regularly transported in it, and I no longer feel safe driving them. REPRODUCED/CONFIRMED BY A DEALER OR SERVICE CENTER: Not yet. INSPECTED BY MANUFACTURER/POLICE/INSURANCE/OTHERS: The insurer opened and then denied the claim and stated that no vehicle telemetry/data was available to preserve. No independent forensic inspection has occurred yet. Police did not attend. WARNING LAMPS/MESSAGES/SYMPTOMS PRIOR TO FAILURE: NONE. There was no warning light, no alert message, and no audible signal before or during the event. The parking sensors did not beep as they normally do. No ABS or brake warning…”

“While driving on I-95 North in the fast lane at highway speed, my 2023 Tesla Model Y experienced a sudden loss of propulsion and displayed a warning indicating the vehicle was shutting down. The vehicle rapidly decelerated and would not respond to acceleration or drive engagement. Steering remained functional, which allowed me to maneuver the vehicle across lanes to the shoulder to avoid a potential collision. This required an emergency maneuver in active highway traffic with my family in the vehicle. A soft reset did not resolve the issue. After performing a hard reset, I was able to move the vehicle slowly off the roadway to a nearby location where it was later towed. This incident occurred without prior warning and created a significant safety hazard due to sudden loss of propulsion at highway speed.”

“The rear subframe wiring harness on my Tesla contains a significant design flaw that creates an unreasonable safety risk. The factory-installed corrugated protective tubing (wire loom) terminates prematurely, leaving approximately 1 inch of critical wiring completely exposed at the connector. This specific harness uses soy-based insulation, which is a known attractant to rodents. Because of the 1-inch gap in protection, rodents have been able to sever the same connector twice within a 30-day period Safety Risk: The exposed wires in the rear subframe harness are responsible for Rear Drive Unit communication / Wheel Speed Sensors / Brakes]. A failure of these wires while the vehicle is in motion could result in a sudden loss of propulsion, unexpected braking, or the loss of stability control systems. This creates a high risk of a collision, particularly at highway speeds.”

“On January 29, 2026 my 2023 Tesla Model Y was serviced by Tesla for windshield repair and routine maintenance. Within a week after the service visit, the vehicle began displaying a service warning message on the dashboard. I contacted Tesla and was advised to bring the vehicle back for inspection. Before I could return to the service center, while slowly reversing out of my garage, a large bolt fell from the vehicle and the front left wheel assembly dropped, causing the vehicle to come to an abrupt stop. Tesla service later confirmed that a bolt from the front suspension link assembly had detached, resulting in damage to the front halfshaft, steering gear, wheel speed sensor, and other related components. The vehicle had approximately 38,000 miles at the time of failure. This appears to be a critical suspension hardware failure. If this failure had occurred at highway speed it could have resulted in loss of vehicle control and a serious accident. The vehicle had been serviced by Tesla shortly before the incident and had displayed a warning message prior to the failure.”

“The vehicle display flashed red and then the vehicle turned off completely while in traffic with no ability to change gear, operate the electronic door releases, or turn the hazards on. Safety was put at risk because insufficient notice of failure was given so it was impossible to get out of traffic, the vehicle could not be put in neutral so could not be pushed out of traffic, further the hazard lights could not be turned on so I had to stand in traffic waiving people around the vehicle. Because the electronic door releases didn't work, the doors could not be opened from the outside, had a front window not been open, it would have been easy to trap our child in the car. The dealer confirmed that the failure took place from vehicle logs but was unable to reproduce the problem. The dealer/manufacturer inspected the vehicle. Prior to this happening the vehicle showed warnings that power was reduced and vehicle may not restart about 20 minutes prior to the event, but the warnings disappeared after a minute. Even though Tesla confirmed the failure, they refused to diagnose the problem or fix it so the vehicle remains dangerous.”