[JohnS3]

Have you run a scan with VCDS? Any errors reported?

 

[JohnS3]

I don’t think there are any parts you can buy for internal repairs. you would also have to cut the unit apart to gain access as they are sealed. Inside the light unit there is a shutter that moves to create high and low beam. Perhaps this is stuck or broken. I’ve not read about a similar issue before. Have you tried places like eBay for used parts?