No problems felt while driving the car, except for a creaking sound that I'm pretty sure is from a dirty piston. Other than that, I don't have any issues with my breaking. This only appears on the rear rotors, the brembos up front look shiny.

 

Are you pads good? Obviously only part of your pad is making contact. But these are pretty cheap so I suggest new rotors + pads and definitely check your calipers.....

 

I just replaced mine yesterday and the back side was extremely rusty and pitted. Th calipers were rusty as well and needed a good cleaning. When I turned the hub it made a slight grinding sound. After replacing the rotors that sound disappeared.

 

Pistons should creak. I'd make sure the pins slide smoothly.

Rear brakes are cheap, just get new pads and rotors. Cheap stuff is usually fine, the rear brakes don't do much work.

 

check your calipers!

 

More than you think....