Hello, I'm Danny.
The sound might be metal on metal noise from the pads being worn out contacting the brake rotor. Here is a tutorial on how to remove and replace rear brake pads and rotors:
https://www.2carpros.com/articles/how-to-replace-rear-brake-pads-and-rotors
Here is a youtube video from our site on how to compress the rear caliper piston when performing a rear brake job:
https://youtu.be/j8YwfSKEzZo
I've attached picture steps below on how to replace the brake pads and rotors on your car. Hope this helps and thanks for using 2CarPros.
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Friday, March 5th, 2021 AT 10:11 AM