Had bearing noise coming from the front of the engine on my black coupe, pulled the belt and checked the idler and tensioner, the idler felt really rough. Ordered a new pulley and belt and put it back together, still noisy. Got back to it today, pulled the belt to check everything else and found the bearing to be bad in the supercharger pulley. I happened to have two spare oem pulleys so installed one and it’s nice and quiet now. I’ll get a new bearing for the one I took off. When I found the bad idler I figured I was done. Should have checked them all the first time.