I believe camber can cause tire wear through this process:

(consider everything perfect other than right front camber being less cambered than the left - same example @flyingdutchman has here)

camber asymmetry causes a pull to the left or right. The right in this example.

driver wants to stay on the road, go straight, so on average he steers to the left to counter the pull

the constant turning input scrubs the tread on the left front tire that is always fighting the camber pull.


I recently had this exact situation on one of my other non-BMW cars. Pull was slight and it took me so long to get around to it, but the camber and tire wear lined up perfectly, so I conclude this was definitely the situation for my case. New tires, and driving straight again.

__________________
2001 X5 3.0i, 203k miles, AT, owned since 2014