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I’ve a Tesla model 3 (2019) where the driver’s side led light started to flicker and then it totally stopped working. It’s not the whole head light, only the led light.
LEDs typically flicker when they are about to die, and then cease working entirely. Consider a service request if still under warranty. If not, they can be bought second-hand for ~$250-300 on eBay if you are comfortable changing it yourself.