NHTSA Complaint #11604984 — 2022 TESLA MODEL 3

Tesla has confirmed that the firmware of the high-voltage controller of the Model 3 is known to occasionally go "missing in action", causing regenerative braking to entirely cease to function and the driving performance of the car to drop considerably. This was expected to be resolved in a firmware update, but the problem continues. The service representative advised that they (Tesla employees) are not allowed to refer to the problem as a defect and instead must use the euphemism "firmware characteristic". The impact of the issue occurring while driving is that braking and acceleration are significantly reduced, thus reducing the ability of the driver to respond to unexpected situations and operate the vehicle safely. The impact of the issue occurring while parked is that the vehicle cannot start until such time as the controller resumes responding. The driver has no control over when/if this will happen, and the car may ultimately require towing. We encountered the while-parked case on 2024-07-07 and the while-driving case on 2024-07-27.