Sounds like a loose or worn out alternator belt. check it out. if you can't see what's up with it. Here's a directory link for you: http://repairpal.com/mazda-repair-in-columbus-georgia
RepairPal Certified shops can diagnose and repair your 2003 Mazda 6. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.