I bought a used 2001 Santa Fe in 2019. When I went to replace the brake pads and rotors, I noticed the backing plates were rusted through and 1 was hanging by a sliver of metal. the rotors were warped from cold rain splashing on hot rotor. Then I knew they warped from water exposure and the new ones will warp also until the backing plates are replaced.

I worked in parts at a gm dealership for 14 years and have been working on cars for 40 years and have never seen backing plates rust out like that, even after being 20 years old. I live in Columbus Ohio (considered the salt belt). I asked the dealer if there was a recall. but they said no.

I have looked at cars in the junk yard but they aren't rusted like that, but all the Santa Fes were rusted the same. As a car gets older, every month there are price changes, prices lower each month as the car ages. Its the popularity pricing system. New backing plates are normally $50 each. The ones for the Santa Fe are $97 each, but the price doesn't seem to go down, because they know its a manufacture defect and you have to have them to save your rotors and the rear hold the emergency brake cable. So all Santa Fe owners get screwed on them.