Peaches returned to the bosom of Casa de la Hoya this evening. So far, so good. It seems like I'm sitting a foot higher now with the suspension repaired, but that may be because I was growing accustomed to the Altima loaner I've had the last couple days.
Kudos to the dealer. They did all the work promised, plus a bit more, and delivered the vehicle a day early.
What they did: front brake sensor; differential gasket, shaft seal and oil seal; suspension control unit (p/n 37-14-6-773-999 in case you're wondering). All under warranty. Oh, and since nobody could figure out what was up with the rear washer they replaced the hose and put it back together as a "goodwill repair".
Go home happy.