All 4 of my factory rotors had rusted like that or worse by early 20 some thousand miles on it.Just wanted to add to this that I replaced the rotors recently and found the issue immediately. The problem was worse than I thought:
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Would have had to replace within the year based on my pad wear:
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Reminder that Jeep only gives you a warranty 12 months or 10,000 miles on brakes, which is a total joke in my opinion.
It does look like a sticking caliper too with one pad worn thinner then the other.