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4

This appears to be a dust shield (or sometimes called a backing plate) for the rotor on the disk brake system. It would cover the back side of the rotor. You would be able to see it if you got under the car and looked at the rotor from the back side. I'm not positive about this, though, as this piece is pretty mangled.


2

Where is the rust at? If it is on the outer edges and/or on the hat area (part in the center where the brake pad does not ride), there's probably absolutely nothing wrong with the brake rotor in the first place. As long as the wear area where the pad does it's business is clear, you have no issues. Only brake rotors which have been treated with some type of ...


1

If it's light enough that it'll scrape off with a toothbrush then it'll be scrubbed off by the pads the first time you use the brakes - i.e. don't worry about it. It's quite normal on any car that has been sitting for more than a few days.



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