04 Sport V6 4wd with 168k. Only problems were a/c compressor, front calipers, and xreas. Just installed a hidden hitch receiver to accept the weight distribution hitch in order to pull a 23' travel trailer. Also, replacing the radiator and adding an additional transmission cooler for the hot temps here when towing.
I wouldn't be adding all of the extras if I didn't trust it could go at least another 100k or so pulling a 5000 lb trailer.