there are a couple of garages that do import work that is guaranteed not to void warranties, and they are cheaper than the dealerships. It would be worth a sit-down with the local phone book in hand, make some calls, and see if there are any alternatives. Incidentally, we've never done all that at 45,000 miles!
"Live in such a way that you would not be ashamed to sell your parrot to the town gossip." --Will Rogers