I see, thanks for answering. I read that you changed your rotors and I interpreted that to be brake related.
I've never seen the need for regular resurfacing of rotors, and needed to replace one, in about 35 years of owning cars. With this Prius and it's very light brake usage, I'm sure they're good for the lifetime of the car, whatever that might be. 3rd Gen brake rotor specs: Front: Thickness new: 25.0 mm Thickness min: 22.0 mm Runout max: 0.05 mm Rear: Thickness new: 9.0 mm Thickness min: 7.5 mm Runout max: 0.15 mm