Hearing that the tires were fine and that the rims supposedly were good, according to the dealership, but IF all four tires are leaking air from over a day of sitting still, then there certainly IS a problem with the rims and/or the tires themselves... And Chrysler should be liable to have them replaced, regardless of the rim's age.

My in-laws have the same thing occurring with their van as well, so it isn't just an isolated instance with ours. Their van came from Tennessee while ours is from New York State.