Hey guys, I have had the same issue on my X3, and I bought new led tail light replacement driver board from a UK website. The quality of the product was super fine, and the price was quite low. I would recommend you guys to give it a try. Here is the product I’ve been using for 6 months and it’s working perfectly.
https://xenons4u.co.uk/bmw-x3-f25-le...b003809-2.html