Started car for first time in a week and was treated to this sound. After driving for about 15 minutes i got annoyed and recorded this video. Any thoughts on what it could be? I think it may be the belts as they sound and look like there bad. Theres no dash lights on and the cars performance has not been affected. Car starts up every time no matter the conditions and has been running on 91 octane fuel. The engine itself was replaced by Mazda not to long ago. But worse case sinero the car still has the extended warranty for 4 months or 6000 miles which ever comes first.