Hello,
To remove the rear rotor, first you will have to remove the brake pads and caliper.
You will need a special tool to retract the piston for the rear caliper.
The tool will line up with the piston and needs to be turned to retract the piston back in the housing.
Here is a helpful article on rear brake replacement:
https://www.2carpros.com/articles/how-to-replace-rear-brake-pads-and-rotors
I have attached the complete rear brake replacement procedure below.
Please let me know of any questions.
Thank you.
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Saturday, October 9th, 2021 AT 2:06 PM