Contact corrosion!
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2009 Audi A4, 2008 Audi A4, 2007 Audi A4, 2006 Audi A4, and 2005 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.
- Transmission housing of continuously variable automatic transmission Multitronic 01J consists of a magnesium alloy.
- Bolts and other components which have direct contact with transmission have a surface coating which is matched to magnesium transmission housing.
- On magnesium transmissions, bolts must always be replaced on following bolted connections: transmission cover to transmission housing and final drive cover to transmission housing.
- 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 whether used parts can be re-installed, always install new parts.
CAUTION:
- Use only Genuine Audi Parts!
- Damage resulting from contact corrosion is not covered by the warranty!