NHTSA Complaint #11706126 — 2021 TESLA MODEL 3

After Tesla replaced my high voltage battery in May of 2024 all of the following started to happen. Prior to the replacement none of these issues were present. While driving under normal conditions, my 2021 Tesla suddenly and violently steered into an oncoming lane or toward the roadside without any driver input. The steering wheel physically turned on its own with force. Full Self-Driving was NOT engaged at the time of the incident. This was not lane assist correction and occurred without warning. Importantly, the vehicle did NOT issue a warning at the time of the steering event. A “Take Control Immediately” message appeared several minutes AFTER the incident, not before or during, indicating a delayed or failed system response. This defect began immediately after a High-Voltage Battery replacement performed by Tesla Service in May 2024 and has occurred multiple times since. The incident presents a serious safety risk, including loss of vehicle control, roadway departure, or head-on collision. In addition to the steering defect, the vehicle began exhibiting multiple electronic and control anomalies immediately after the High-Voltage Battery replacement. These include navigation/map screen failures, windows adjusting themselves while driving, random “cannot shift into drive” warnings, system failure messages, camera malfunctions, and unexpected screen reboots. These issues did not exist prior to the battery replacement and support the presence of an underlying electrical or control system instability related to the steering defect.