Originally Posted by Railgun
I think some of you are trying to over engineer a solution. It's a design flaw that BMW needs to address. By shoving a clip or something in there is only a band-aid. My theory is that the arm is slowly being backed away from the wastegate journal. By shoving something in there, you may cause the issue to worsen/accelerate and possibly back the arm off altogether. There's no performance hit that I can see as any lateral movement at this point wouldn't affect the operation of the gate itself. It's more a nuisance than anything. Until, that is, it fails completely.
Just my $.02
This is why I added in the previous posts that I was worried with how my wastegates got this way.