If there are two different sizes of rear rotors, the best option would be to call the dealer and provide them with your VIN, the parts department would be able to look up the brake rotors and pads that is for your specific car and should be able to provide you with the part numbers. Those numbers can be cross-referenced by your local auto parts store to get aftermarket rotors and pads. Or you can just get the factory parts if you like.
Here is a helpful guide:
I have attached the replacement procedure below.
Let me know if you have any questions.
Images (Click to enlarge)
Tuesday, October 4th, 2022 AT 6:16 PM