Gallivant,
I found after I'd bought my Sorento at Christmas that the front propshaft was missing. So I looked on Ebay and found this one, brand new, for less than £200.
Kia Sorento Mk1 2.4 [2002-2009]. Kia Sorento Mk1 2.5 CRDi [2002-2009]. Kia Sorento Mk1 3.5 V6 4WD [2002-2009]. Fitting Position : Front. For the Following Cars 491003E070 / 49100-3E070 / 15922549 / 15922550.
www.ebay.co.uk
I've since fitted it and it's fine. The fitting bolts are 6 allen bolts at the front end (where it joins to the front diff), and 4 hex head bolts at the back end, where it joins to the output flange on the transfer box.
I found the job relatively easy to do, but required me being on my back under the car, with the front end raised up around 2ft in the air.
If you want to run your car without the front propshaft you can do that easily, but you may find the tapered fit of the shaft at the front end, where it joins the front diff, can be difficult to get out of the cup it sits in.
With the shaft either in place or removed you won't notice any difference at all in the way the car drives on normal roads. The only time you'd ever know it was there is if you're going across a muddy field and the back wheels start sliding around. At that point, with the shaft in place you can stop the car, select 4WD Low on the switch, and as soon as you pull away you'll feel the front wheels begin to bite if the rear wheels slide again.