Contact Corrosion
WARNING: This page is about a different car, the 2023 Volkswagen Atlas. However, it is still accessible from the selected car via links, so may be relevant.
Contact corrosion can occur if incorrect fasteners (bolts, nuts, washers, etc.) are used.
For this reason, only fasteners with a special surface coating may be installed.
Furthermore, only rubber/plastic parts and adhesive made of electrically non-conductive materials are used.
If there are doubts about whether the parts are suitable, then use new parts. Refer to the appropriate Electronic Parts Information.