A new rear differential (AWD) and labor. Because apparently going down the drive-way when water is flowing across it will flood your diff. I forgot I was in a car and not my Jeep, basically, and figured if the water didn't come up to the door sills, it was safe. You know, live I've done with my Mustang GT, Trans Am, and a P71 interceptor. But no. That was NOT the case, and it ruined the diff. The Mazda dealer begrudgingly covered it, and forever earned my loyalty as far as I can extend it to them and be financially competent.
*I paid $2K for what amounts to a bumper to bumper 6/100 warranty through my CU, and rolled it into the note. I'm glad I did! Noone really knows how these things hold up 80-100K miles, TBH, as the sample size hitting that is still pretty small, so I figured it was smart money. If a rear diff is $26XX including labor, I'm inclined to be happy I did!