2000 Ford Focus - Squeaky belt

Squeaky noise on right front by belt

Most likely it is coming from the belt tensioner or idler pulley. I would replace both along with a new serpentine belt.

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Ask shop if it is advisable to remove belt and run engine briefly. If sound goes away, you’ll know it is something to do with the belt or the belt path. While belt is off, the shop tech can manually rotate the various accessories, idler pulleys, on the belt path, might glean a clue from that. Note: Running engine with accessory belt removed might disable something important like the water pump, so make sure shop believes that method is a safe test for the car’s configuration, and only briefly.