Hello,
It could be the brake pads rubbing against the rotors.
Inspect the brake pads. Make sure that they are secured. As is the anti-rattle clips are loose or missing on the pad it can move around and run against the rotor.
But when you depress the brake pedal the pads gets firmly pressed against the rotor and the noise goes away as the pads are unable to move around.
https://www.2carpros.com/articles/how-to-replace-front-brake-pads-and-rotors-fwd
I have attached diagrams for your reference.
Please let me know if you have any questions.
Thank you.
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Saturday, October 16th, 2021 AT 2:59 PM