Tip for not so DIY mechanicks. Check your car after geting it back from the shop ! I retorque my wheels after tire shop does any repair to them. Now I will do the same uder the hood as well.
Did a 120k service, 4k later the air pump puley went south.
Belt felt kind of tight when I was removing it to get to the airpump. Took a look at the tentioner... no pointer there ! I guess they just estimated the belt tention in the shop, thus $300 part and 2 days of agrevation. Why agrevation ? nothing was torqued to the specs so it took me forever to uscrew. Sorry had to went.

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Dmitry
90' 300CE
17" Intra Signums
Brulen mufler
Euro Headlights/Clear Blinkers
White gouges (made my own)