41 00... Spot-Weld Bonding Steel Parts

WARNING: This page is about a different car, the 2010 BMW 550i, 2009 BMW 550i, and 2008 BMW 550i. However, it is still accessible from the selected car via links, so may be relevant.

The spot-weld bonding process is used starting from the E65 to increase vehicle rigidity. In partial bodywork areas, a 1- component adhesive is applied to the spot flanges and this is followed by resistance pressure spot welding. The adhesive is hardened only after the paint drying process (at approx. 180°C).
In the case of repairs, adhesive is not applied to the spot flanges. The number of welding spots is doubled as a substitute for the omitted adhesive.
The following processes are used as a substitute for spot-weld bonding:
- MAG welding (Metal Active Gas welding)
- Resistance pressure spot welding (referred to in the following and in the repair instructions as spot welding).
Adhesive is not applied between the spot flanges on new parts in the case of 2- or multi-sheet joints. Areas which cannot be reached by the spot-welding tongs can be joined by MAG spot welding. The number of welding spots is doubled as a substitute for the omitted adhesive.

CAUTION: Extract smoke and fumes during welding work.