I have a 2002 Xterra SE supercharged and about a week ago I noticed a knocking coming from the front end when I let off the accelerator...It does the same thing when parked and it sounds as if something is rattling. The higher the RPMs are the more intense the sound is... I am not familiar with cars whatsoever so I have not driven it for several days in fear it might get worse. It does have high mileage with a little over 200K, I have read on some forums that the rod bearing may need to be replaced but I want to get some additional advice!