Contact Corrosion
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.
Contact corrosion can occur if incorrect fasteners (bolts, nuts, washers, etc.) are used.
For this reason, only fasteners with a special surface coating are installed.
In addition, rubber or plastic parts and adhesives consist of non-conductive materials.
If there are doubts about whether parts can be used or not, then use new parts. Refer to the Parts Information.
NOTE:
Only original replacement parts are recommended. They are checked and compatible with aluminum.
The use of Audi accessories is recommended.
Contact corrosion damage is not covered under warranty.