I think he's referring to the brake caliper.  It would be covered for 5
years/60k miles if defective.  My experience is that most places that say
calipers are sticking either don't know what they're talking about or
don't know how to service them properly (i.e. lubricate the slides when
replacing the brake pads).  

In my opinion aftermarket brake chains sell calipers under the guise of
sticking because the pads on one side wear a little more than the other.
Unless there's a significant wear difference, the difference in probably
normal.  My experience with the Santa Fe is that the left front seems to
wear a little quicker than the right front-- and I would think it's a
vehicle design characteristic, because almost all I've seen are this way.

Your brake clip is not bad, the problem is in the slider pin (most likely
the botttom pin), hyundai will tell you the entire caliper must be replaced
(this is the only way you can get the pins), but you can remove the pin
(unscrews), clean the caliper hole with a gun barrel cleaning brush and some
brake cleaner, and clean the pin with emory cloth then lube both with brake
lubricating grease and reassemble. problem solved. P.S. you will probably
need to change the pads if one side is worn low.