The difficulty in finding info is true. I'm a member of a couple of Kia forums, Sorentosite and Kia Forums, both mentioned here.
So far, the car has held up well. I almost sold it but decided to keep it for another year at least. It serves my purpose and it's paid for.
I've had relatively few problems, although the article seems to miss some of the more common ones yet does mention one I wasn't aware of: a generalized electrical systems problem.
Specifically, here are the problems which I have seen and which
might affect any given 2003-2004 Sorento:
1.
Drive shaft issue:----- Makes a clunking sound on occasion.
Might be a sign of serious failure or it could be normal.
2.
Digital Clock failure:----- Clock runs fast and eventually fails. Dealer will fix under warranty.
3.
Fuel gauge failure:----- Gauge will start jumping erratically before failing altogether. Dealer will fix under warranty.
4.
Dome light does not always come on automatically:----- Loose connection which seems to let in moisture. Intermittent.
5.
Headlights burning out quickly:----- Kias seem to go through headlight bulbs quickly. It could be because they double as DRLs but not sure.
6.
Faulty coil pack:----- One of the 6 coil packs failed in my Sorento. Dealer fixed under warranty. This is rather rare, I think.
Other than that, the beast has behaved itself. Gas consumption is worse than reported but that seems par for the course given the method of reporting in use prior to the upcoming 2008 model year.