i guess some models didn't have the ABS reluctor ring on the cv driveshalft...
http://www.nicoclub.com/FSM/Quest/1999_Quest/ax.pdf
scroll to page AX-6 the bottom pic where it's showing you the cotter pin/ and nut on the lower ball joint; right above it is the ABS reluctor ring and to the front of that you should see the sensor mounted w/ one screw on the hub & that one single wire. some on this forum says to remove / move this sensor out of the way to prevent accidental breakage when doing this job. of course, the FSM isn't too clear about this part of the job...
generic pic of a similar nissan driveshalft/ cv shalft
notice that reluctor ring next to the slpined shaft that mates to the hub?
another generic pic of the ABS ring...
the premium is BRAND NEW, not remanufactured from a core return. Hey, maybe some CA models went cheapo and didn't require/need the ABS system <shrugs> they ALL carry a lifetime warranty so your choice really. i don't have problems with the reman units of my autozone / advance auto parts stores in my area
keep a copy of the receipt in your glovebox, eventhough they linked your records w/ a phone number...