That is very hard to believe unless you would have your foot on the brake pedal constantly
Sounds fishy, but need more information: 3000 miles after What?
Once you assest the actual wear and decide to replace or not, you need keep in mind that the work is not hard, but you need the proper tools and don't want the caliper to close when doing the replacement. Check some of the video to determine if is a DIY for you... For a mileage, if you are a technical driver that prefer speed management over constant acceleration breaking, the rotors & pass should last around 15k miles and you can see up to 30k or slightly more.
Hard to believe. Unless you bought this car with existing issues.
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