Contact Corrosion

Contact Corrosion

General:

• Contact corrosion can occur if non-approved fasteners are used on vehicle (bolts, nuts, washers, etc.).

• For this reason, all fasteners used in production are specially treated.

• In addition, rubber or plastic parts and adhesive are made of materials that do not conduct electricity.

• If you are not sure about the suitability of parts, install new parts.

The following points should be observed especially for transmission:

• Through approximately 2004, the transmission housing for the multitronic 01J transmission was made out of magnesium alloy; from 2005 it is made out of aluminum.

• Bolts and other components which have direct contact with the transmission have a surface coating which is matched to the transmission housing.

• On magnesium transmissions, bolts must always be replaced on the following bolted connections: Transmission housing cover and final drive cover on transmission housing as well as engine bolts on transmission.

• Contact corrosion occurs when incorrect components (bolts, nuts, washers, etc.) are used. The transmission housing will be damaged.

• Transmission housing, transmission cover and differential cover must all be of same material.

• If you are not sure about the suitability of parts, install new parts.

Note:

• Original replacement parts are recommended because they have been tested.

• We recommend using Audi accessories.

• Damage resulting from contact corrosion is not covered by the warranty.