Brake Caliper, Removing And Installing: Notes
WARNING: This page is about a different car, the 2021 Audi S4 and 2021 Audi A4 Quattro. However, it is still accessible from the selected car via links, so may be relevant.
Always replace the self-locking nuts and bolts.
Replace damaged bolts and nuts.
Clean the bolts and nuts before reusing.