55 - sorry I don't have the specifics, but there was a post on here last year about major troubles with automatics on the earlier Sedonas. That would include 2002. And there is a Kia Sedona board somewhere associated with Edmunds.com, I think.
My 2004 has been fine, except for the belt-idler (tensioner?) that wasn't lubed correctly at factory. Replaced under warranty. The 2004 3.5L Hyundai engine does not idle smoothly regardless. It does run smoothly and has power.
Second buyers get the 60K warranty, and lose the 100K powertrain warranty that the original buyer gets.
Gov't mileage estimates on mine - 16/22.
Actual MPG - 16.7 / 22.4.
Amazingly close, I think.