I came across this site while searching on Google about a Vanos error. It was great to learn about DrVanos.com and how I could save some money. I have a 2003 M3 with a little over 175K miles, power has been down at lower RPM's so it sounds like I have a Vanos issue. One of the post I read suggested that the problems often is with a bad solenoid. Should I try replacing the Solenoid first? I would appreciate any feedback! Does anybody on here have more mileage on an 03 than 175K ?