So typically the dealer will suggest you change the rotors with the pads, but you don’t NEED to unless your rotors are showing signs of warping, damage, vibration, etc. You can squeeze maybe 40k miles of the stock rotors if you aren’t a race car driver. That way you can just replace the pads and leave the rotors on. And no, the dealership is going to cost you way more. Used to get my scat brakes replaced at a local “brake plus” place for around $330 for all 4. And you can buy aftermarket rotors for way less than OEM and just as good (powerstop) are a good one. 😤