Thanks! Wouldn't you know it, today when I got in it, I started it and while in park I pumped the brakes a few times then drove off. The braking felt a little strange for the first couple of stops, like the right caliper was cycling between braking and not braking, then it started working normally again. Full braking power and no pulling either direction. Weird.

I'm going to leave it alone for now since my wife drives the new X5d and almost never drives my old girl.