So, the rear knuckle bushes were replaced (with Febest bushes), but the noise remains.
There are corrosion spots on the inside of the rear discs. They are clean on the outside, but have become very grooved. The front rotors are OK on both sides.
Now there is also a light pulsation on the brake pedal, along with the noise. But the steering wheel does not pull left or right when stopping.
The shop now suspects that the rear calipers are corroded and not pressing the pads evenly, and suggested replacing them.
Can it be the rear calipers?
If I choose to rebuild them, is it enough to replace the seals and the o-rings, or better get the pistons and slides as well? I want to have everything ready before taking them apart.