Well, I've been loosing coolant as of late, but not enough to cause overheating. So this morning I took it in and they say my water pump is out.

Luckily, I already have a water pump that I purchased to put into my 323ci and never did... So i'm going to have that done, but I'm wondering if I should just go ahead and replace the t-stat and hoses too as I believe is the general consensus on the e46 forums.

Also, I'm running near 150k miles so I'd rather not push having to redo this mess with the t-stat again soon.