210K KM's 2004 Sienna. The water pump was leaking and rattling at idle, and I knew it needed imminent replacement. Before I could order parts the belt tore and stranded a family member on side of hwy. My guess is that the worn pump bearing allowed the tbelt to walk on to the lip of the pulley and shred it.
The bearing was severely worn and had excessive play, and I was surprised to see a loose bearing technology (vs a sealed found in idler / tensioner). I only found 2 bearings, but there could have been more.
And here's tbelt aftermath:
The bearing was severely worn and had excessive play, and I was surprised to see a loose bearing technology (vs a sealed found in idler / tensioner). I only found 2 bearings, but there could have been more.
And here's tbelt aftermath: