I have an 05 Sedona and this van is surprisingly the most reliable van I have ever seen. Kia's cars are crap but this van has 306,234 miles on it right now and still runs like the day it came off the showroom floor. The engine is so quiet you can't hear it run and the transmission still shifts like it should. I love the room inside and the seats are easy to remove. I've even hauled my jetski in it a few times! I keep the oil changed with 10 w30 Mobil 1 synthetic. That may also account for the great gas mileage I get in this van. It only uses a quarter tank up and back from my house to my mother's house which is about 80 miles away as long as you keep the mph fairly steady. Keep that in mind.
This Van Currently has 123,000+ miles on it and counting, we've used it to haul all my kids to their games and meets, move their stuff to their college dorms and apartments. We have moved furniture, appliances, taken trips, been all over in it, she's been old reliable. Haven't had any problems with this van, I would buy another one were it not for the fact that in another year I wont need to be moving anymore kids and I can downsize again finally.
Bought the van fully loaded: leather, DVD, ABS, moonroof, etc. Comparatively equipped mini-vans were much more expensive. Currently has about 58k miles after 8 years. The brakes went out by 20k miles and the ABS never seemed to work right. Replaced tires with Hankook (factory) tires the first couple of times. The inner walls on the front tires kept wearing out. Went with Michelins the last time and they seem to be working better. Haven't had any major problems but looking at around $900 for timing belt replacement at 60k miles. Also, spark plugs are very difficult to change out. I average about 13 mpg city and 20 freeway. Paint is fading. Mirrors and bumpers are first to go.
We bought the van from our friend whose wife had died. The van was 2 years old, low mileage and well maintained. All went pretty well until the warranty expired! We had done routine maintenance and minor problems. Went for the inspection sticker and it failed (first time in my life that's happened and been driving over 50 years!) Went to Kia per our mechanic. After 2 or 3 visits and megabucks, it finally passed (replace the 2-yes, two- catalytic converters and some other problems they found). Since then we've replaced the compressor - twice, replaced rear heating lines, and the final blow - the engine broke (thought it sounded like the compressor went again. The 2005 Sedona has less than 55,000 miles!!! Guess we won't get another like we planned.