One problem related to sensing system camera has been reported for the 2021 Tesla Model 3. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2021 Tesla Model 3 based on all problems reported for the 2021 Model 3.
Since the v11 user interface update, when you put the car into reverse, the rear camera sometimes does not show up, or often shows up only after a delay. Sometimes the delay is just a second or two, other times it is a minute or seems to hang forever. Today I was parked in front of my kid's school dropoff zone, and needed to back up after they got out to leave. When I went into reverse the cameras were just black and stayed that way. This was especially worrying in this scenario since small children could be walking behind me that I wouldn't be able to see without the camera. This was never a problem until the v11 user interface update, which also causes other safety problems, by burying important functions behind menus. For instance you now have to dig into a menu and reach all the way to the right side of the screen to operate the wipers, you have to dig into menus to operate basic climate control functions that used to be immediately available, etc.