For a clicking or creaking sound take off the front wheels and check the metal spring clips that stick out of the brake caliper by the rotor edge. If you wiggle them they might seat better. That spring clip could creak or clink.
The only other brake part that comes to mind that might make that sound is the metal slide that’s in the groove that the rear brake pads sit in.
Both these parts are shiny spring-steel that can be noisy if they rub on a pad or disc.
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'18 F80 Base 6MT | '19 F82 Exec DCT | '18 F82 Comp Exec DCT | '23 G80cx
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