Tesla has released an update for all of its Model Y models and some of its Model 3 units. It turned out that a problem occurred, in which in some of the cars the rear lights blinked due to a bug.

The update has been out for more than another week, according to a report to the US National Highway Traffic Safety Administration. According to Tesla, the automaker discovered the problem in October through reports from various countries. “Under certain circumstances, the tail lights light up intermittently. That’s because of a bug in the software that causes incorrect detections in the process of booting.”

According to the automaker, it is only about tail lights and not about brake lights and turn signals, among other things. The update itself comes to the attention of car owners. These are Model Y models from 2020 to 2023 and 2023 models of the Model 3. In total, in the US alone, there are about321, 000 cars that drove around with the bug, the carmaker says. It is the eleventh time Tesla has reported a similar problem to the NHTSA this year. In most cases, the problems affected fewer cars.