[aj555]

It will throw a shadow code to BMW when they hook your car up. Thats a no go for them. You can just look for the small vacuum cord that plugs into the muffler. Look under the drivers side rear wheel. Pull it some so there is a bunch of slack. Fold it in half, and zip tie it. Your hands will get a little dirty, but it takes 2 minutes. Plus if your car is still under BMW warranty all you have to do is cut the zip tie before you go in, and no one will know.