Video tutorial on how to repair the leak on the power steering reservoir found on BMW vehicles. This is a very common issue with a simple fix. The sign of failure in this situation is you will notice an excessive amount of power steering fluid residue around the cap area slowly working it's way down the reservoir and finally to the components located directly underneath. This is normally caused by the failing gasket or o-ring in the cap and can be purchased for just a couple dollars. The gasket or o-ring is design to keep the oil in and keep the dirt out of the reservoir. This particular tutorial was done on a 1997 BMW 540i.