Heat the front radar to keep it free of snow or ice in cold conditions.
If you have snow or ice build-up on the bumper, it may prevent the radar from working.
Tesla has added a heater in later models. Tesla is moving away from radar systems and has removed it entirely from the Model 3 and Y, and is expected to be removed from the Model S and X cars later in 2021. The latest generation of Tesla Vision no longer uses radar as input.