RepairPal Certified shops can diagnose and repair your 2003 INFINITI M45. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
remove the belts,start the engine for a couple minutes,see if you still hear it..if not,then cut engine off..turn all pulleys by hand,see if one is hard to turn/in a bind,got the wobbles?..