[Warp Ten]

I had a similar problem on my 2019 540xi with an intermittent lane departure warning in March of 2019. It would go off at times even though I was changing lanes without a signal it wouldn't warn me. Happened on a long trip on the highway in good weather with clear roads and a clean car. Had it checked at my dealer and they couldn't find a problem. The RO said somewhat cryptically: "5272 Performed vehicle test has lack of visibility fault which is caused by rain, snow, dirty windshield, fog no other faults were stored." Even though none of those conditions existed when I had the problem. Perhaps a loose electrical connector? But for all that, I have not noticed it malfunctioning since. --Bob