Issues in my 04 S60R M66. Over the past month or so I have noticed a tiny leak from under the ps reservoir/pump area. I did some research and found the known issues with the vent on the reservoir. I ordered the new one from IPD but have not installed it yet. Yesterday on my way home my steering got very heavy and was groaning when turning the wheel. I pulled over and found the reservoir nearly empty. I filled it and nursed it home. When I got home I looked again and found it was half empty after 5 miles or so with a drip line coming from the seam on the side of the box. I would think that it was the box but when I open the cap there is positive pressure in the reservoir. I am going to replace it today but was hoping someone here had some insight for me. Thanks for the help.