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With the new EPDM micro V belts, you cannot judge their condition by looking at them - these belts wear out like the tread on a tire.
They do not crack or lose material like older belts
You need a gauge to test their wear.
Volvo dealers change these belts according to your maintenance manual, not by trying to see how they look, my dealer does not use a gauge.
If I remember correctly, I thought the schedule was 60K, check your manual.
See - https://www.gates.com/us/en/vehicle-engine-systems/power-transmission/micro-v-belts-serpentine-belts/c/344
View this video on youtube - GATES TRAINING: Inspecting Serpentine Belt Wear with Gates' New Belt Wear Gauge
They were offering a free gauge - I got 3 of them, one for my son-in-law who is a Subaru tech - he had never heard of them.
My indie mechanic has a Gates display on micro-v belts and does use a gauge
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