The factory put spacers between the calipers and the spindles on our cars. There are usually a couple of them for each caliper. What is their purpose? I am assuming that they help center the caliper on the rotor to help ensure that the brake pads wear evenly on both sides.
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Correct, they are shims of different thickness to center the caliper on the rotor.
Those are shims to center the calipers. It can be an indication of a "tuned" brake system.
Not all manufacturers use them. It can also be an indication that the calipers and spindles were not originally intended for each other and need to be somewhat adapted.
To be fair, on all of my systems I've shimmed the calipers for better centering.
